{"id":1603,"date":"2026-09-08T03:07:43","date_gmt":"2026-09-08T03:07:43","guid":{"rendered":"https:\/\/superiortransmissioninc.com\/?post_type=product&#038;p=1603"},"modified":"2026-09-08T05:18:22","modified_gmt":"2026-09-08T05:18:22","slug":"ep-aircraft-double-helical-gear","status":"publish","type":"product","link":"https:\/\/superiortransmissioninc.com\/id\/produk\/ep-aircraft-double-helical-gear\/","title":{"rendered":"Roda Gigi Heliks Ganda Pesawat EP"},"content":{"rendered":"<div style=\"width: 100%; max-width: 100%; min-width: 100%; font-family: Georgia,'Times New Roman',serif; color: #1a2030; line-height: 1.8;\">\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: linear-gradient(135deg,#f0f3fb 0%,#f7f8fc 55%,#eaedf8 100%); border-left: 5px solid #2a3a8a; padding: 36px 32px 32px 32px; margin-bottom: 32px; box-sizing: border-box;\">\n<h1 style=\"color: #1a2050; margin: 0 0 14px 0; letter-spacing: -0.4px;\">EP-Aircraft Double Helical Gear \u2014 Precision-Engineered Double Helical Gear for Aerospace and High-Reliability Drive Systems<\/h1>\n<p style=\"color: #2a3060; margin: 0 0 18px 0;\">The EP-Aircraft Double Helical Gear represents the most demanding tier of our gear manufacturing programme. Designed to meet the dimensional, material, and quality standards required in aircraft auxiliary drives, rotorcraft transmission systems, and defence-grade mechanical assemblies, this double helical gear eliminates the axial thrust loads that constrain standard helical gear designs \u2014 while delivering the smooth, high-contact-ratio meshing that precision aerospace applications demand. With dimensions spanning \u03a63 mm to \u03a6120 mm and modules from M0.15 to M2.0, this series covers the miniature and small-module double helical gear range used extensively in avionics actuation, fuel system drives, and aircraft instrument geartrains.<\/p>\n<p><a style=\"display: inline-block; background: #2a3a8a; color: #fff; padding: 13px 32px; text-decoration: none; border-radius: 4px; letter-spacing: 0.5px; margin-top: 6px;\" href=\"https:\/\/superiortransmissioninc.com\/id\/double-helical-gear\/\">Roda Gigi Heliks Ganda<\/a><\/p>\n<\/div>\n<p><!-- Product Introduction --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #fff; border: 1px solid #d0d8ef; border-radius: 6px; padding: 32px; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 16px 0;\">What Is a Double Helical Gear \u2014 and Why Does Aircraft Engineering Demand It?<\/h2>\n<p style=\"margin: 0 0 16px 0;\">A double helical gear \u2014 sometimes referred to as a double helix gear or herringbone gear in broader engineering usage \u2014 is a parallel-shaft gear whose tooth geometry consists of two opposing helical sections cut on the same gear body, one with a right-hand helix and one with a left-hand helix. The result is a characteristic V-shaped or chevron tooth pattern. The mechanical consequence of this geometry is fundamental: the axial thrust forces generated by the two halves cancel each other within the gear body itself, producing net-zero axial load on the shaft bearings. This is the defining advantage of the double helical gear over standard single-helix helical gear designs, and it is the primary reason why high-power, high-speed aerospace and marine transmission engineers have favoured double helical configurations for over a century.<\/p>\n<p style=\"margin: 0 0 16px 0;\">In aircraft applications specifically, where weight, space, and reliability margins are all simultaneously constrained, the double helical gear design solves a problem that otherwise requires heavy, complex thrust-bearing arrangements. By eliminating the need to react axial gear loads through dedicated thrust bearings, the gearbox designer can use smaller, lighter bearing assemblies \u2014 reducing total drive weight without compromising load capacity. For miniature aircraft auxiliary drive units, this space-efficiency advantage is often decisive. The EP-Aircraft series operates from M0.15, covering instrument drives and precision actuator mechanisms, up to M2.0 for larger actuation and accessory gearbox stages.<\/p>\n<p style=\"margin: 0;\">Understanding the difference between double helical vs herringbone gear is relevant here: in strict engineering usage, a true herringbone gear has continuous teeth that meet at the centreline without a groove, while a double helical gear has a relief groove at the centreline between the two helical sections to allow hobbing tool runout. The EP-Aircraft series is produced as a double helical gear with a centre groove, enabling the tooth-grinding operations that achieve the precision meshing grades \u2014 ISO6, AGMA 13, DIN 5 \u2014 required for flight-critical and defence applications. The double helical gear design in this configuration retains all the thrust-cancellation advantages of a herringbone while supporting the manufacturing accuracy that aerospace-grade gearing demands.<\/p>\n<\/div>\n<p><!-- 5 Key Advantages --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 20px 0;\">Five Key Advantages of the EP-Aircraft Double Helical Gear<\/h2>\n<div style=\"display: flex; flex-wrap: wrap; gap: 16px; width: 100%; max-width: 100%; min-width: 100%; box-sizing: border-box;\">\n<div style=\"flex: 1 1 calc(33% - 16px); min-width: 240px; background: linear-gradient(160deg,#eef2fb 0%,#e4ecf8 100%); border-radius: 6px; padding: 24px; box-sizing: border-box; border-top: 3px solid #2a3a8a;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Zero Net Axial Thrust \u2014 Bearing Load Eliminated<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">The opposing helix sections of a double helical gear cancel axial forces internally. Shaft bearings see only radial and tangential loads \u2014 not the axial thrust that a single-helix helical gear imposes and that requires larger, heavier thrust bearing arrangements. In aircraft auxiliary gearboxes, this thrust elimination is a direct weight-saving and reliability improvement simultaneously.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(33% - 16px); min-width: 240px; background: linear-gradient(160deg,#eef8f2 0%,#e4f5ea 100%); border-radius: 6px; padding: 24px; box-sizing: border-box; border-top: 3px solid #2a7a4a;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Highest Overlap Contact Ratio \u2014 Superior Load Distribution<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">With two helical tooth sets engaging simultaneously, the effective overlap contact ratio of a double helical gear is approximately double that of a comparable single-helix helical gear. More teeth in simultaneous mesh means lower peak tooth stress, extended fatigue life, and significantly lower transmission error \u2014 the root cause of gear noise and vibration in precision drives.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(33% - 16px); min-width: 240px; background: linear-gradient(160deg,#fdf8ee 0%,#faf2e0 100%); border-radius: 6px; padding: 24px; box-sizing: border-box; border-top: 3px solid #a07820;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Multi-Material Flexibility \u2014 ODM\/OEM Customisation<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">The EP-Aircraft series is available in a comprehensive material range: metal alloy steels, stainless steel helical gears, bronze, aluminium, POM, zinc, brass, and copper \u2014 selected by the customer based on operating environment, corrosion requirements, and weight constraints. Full ODM\/OEM customisation is supported, including custom made helical gears produced to customer-supplied drawings or samples.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(50% - 16px); min-width: 240px; background: linear-gradient(160deg,#f8eef8 0%,#f4e8f4 100%); border-radius: 6px; padding: 24px; box-sizing: border-box; border-top: 3px solid #8030a0;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Aerospace-Grade Meshing Quality \u2014 ISO6 \/ AGMA 13 \/ DIN 5<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">The meshing grades certified for the EP-Aircraft double helical gear \u2014 ISO6, JGMA 1, JIS 6, AGMA 13, DIN 6, DIN 5, AGMA 12 \u2014 represent the upper tier of international gear quality standards. AGMA 13 in particular is rarely achievable without CNC tooth grinding and post-grind inspection using gear measurement equipment traceable to national standards. These grades are mandatory for flight-critical and military-grade gear applications.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(50% - 16px); min-width: 240px; background: linear-gradient(160deg,#eef8fb 0%,#e2f4f8 100%); border-radius: 6px; padding: 24px; box-sizing: border-box; border-top: 3px solid #1880a8;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Miniature Module Range \u2014 M0.15 to M2.0<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">From M0.15 for precision instrument drives through to M2.0 for auxiliary power unit accessory gearboxes, the EP-Aircraft series covers the complete miniature and small-module double helical gear range. Very few gear manufacturers are equipped to produce double helical gear design at M0.15 with consistent tooth geometry \u2014 this requires specialised hobbing tooling, precision temperature-controlled machining environments, and skilled gear measurement technicians.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Working Principle --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #f5f7fc; border: 1px solid #d0d8ef; border-radius: 6px; padding: 32px; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 16px 0;\">Working Principle of the Double Helical Gear<\/h2>\n<p style=\"margin: 0 0 14px 0;\">The double helical gear transmits power between parallel shafts through two sets of involute helical teeth \u2014 one set cut with a right-hand helix angle, the other with a left-hand helix angle of equal magnitude. As the gear rotates, both helical sections engage with their counterparts on the mating double helical gear simultaneously. Each helical section generates an axial thrust force, but because the two sections have opposing helix directions, their axial forces act in opposite directions along the shaft axis and cancel at the gear hub. The shaft and its bearings experience only the radial (separating) force and the tangential (driving) force \u2014 not the axial component that engineers must accommodate with thrust bearings in single-helix helical gear arrangements.<\/p>\n<p style=\"margin: 0 0 14px 0;\">The effective contact ratio of a double helical gear is the sum of the transverse contact ratio and twice the overlap contact ratio of a single helical section. In a well-designed double helical gear at a typical aerospace helix angle of 30\u00b0\u201335\u00b0 per side, the total contact ratio exceeds 3.0 \u2014 meaning at least three tooth pairs are simultaneously carrying load at any point in the mesh cycle. This high contact ratio is why double helical gears achieve substantially lower transmission error than single helical gears of the same module, which is the quantitative explanation for their quieter, smoother operation in high-speed aircraft gearboxes.<\/p>\n<p style=\"margin: 0;\">The double helical gear design also provides a natural self-centering action: because the axial forces from the two tooth sets balance within the gear, the gear will shift axially to the position of minimum gear mesh force \u2014 effectively self-adjusting to the optimum contact position without requiring precision axial location of the gear on its shaft. This self-centering behaviour is particularly valuable in aircraft accessory drives where thermal expansion during flight operations can cause differential shaft growth between the gear housing and the rotating components.<\/p>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; text-align: center; margin-bottom: 28px; box-sizing: border-box;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1604\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-products-EP-Aircraft-Double-Helical-Gear.webp\" alt=\"superiortransmissioninc-products-EP-Aircraft Double Helical Gear\" width=\"800\" height=\"800\" title=\"\" srcset=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-products-EP-Aircraft-Double-Helical-Gear.webp 800w, https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-products-EP-Aircraft-Double-Helical-Gear-480x480.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 800px, 100vw\" \/><\/div>\n<p><!-- Material Section --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #fff; border: 1px solid #d0d8ef; border-radius: 6px; padding: 32px; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 16px 0;\">Helical Gear Material Options &amp; Manufacturing Process<\/h2>\n<p style=\"margin: 0 0 14px 0;\">The helical gear material selected for any aircraft double helical gear must satisfy a matrix of requirements that differ substantially from general industrial gear applications. In aerospace, the weight penalty of choosing a denser material is penalised across the entire service life of the aircraft. The corrosion resistance of the chosen material must survive the humidity cycling, altitude exposure, and fluid contamination environments of aircraft systems. And the fatigue strength of the material must be adequate for the high-cycle stress reversals experienced in continuous-duty accessory drives.<\/p>\n<p style=\"margin: 0 0 14px 0;\">The EP-Aircraft series addresses this with a fully flexible helical gear material programme: alloy steels (including 20CrNiMoA, 42CrMo4, and aerospace-specific grades), stainless steel helical gears for corrosion-critical environments, aluminium alloy for weight-critical applications, bronze for self-lubricating and non-sparking requirements, POM engineering polymer for instrument drives requiring electrical isolation, and brass or copper for specific specialist applications. The manufacturing process \u2014 how helical gears are made at this precision level \u2014 follows a sequence of: material selection and bar\/billet qualification \u2192 CNC turning \u2192 gear hobbing or milling (helical gear machining) \u2192 heat treatment (carburising, nitriding, or through-hardening as specified) \u2192 tooth grinding \u2192 dimensional inspection against drawing tolerances \u2192 surface treatment as required.<\/p>\n<p style=\"margin: 0;\">The tooth-grinding stage is what distinguishes this product from standard hobbed helical gear manufacturing. Machining helical gears to AGMA 13 or ISO6 requires CNC gear grinding machines with sub-micron positional resolution, temperature-controlled workholding, and traceable measurement \u2014 capabilities that very few helical gear manufacturers worldwide possess for the miniature module range (M0.15\u2013M2.0). The result is a double helical gear that meets the surface finish, profile accuracy, pitch accuracy, and runout specifications demanded by aviation and defence procurement specifications globally.<\/p>\n<\/div>\n<p><!-- Specifications Table --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 18px 0;\">Technical Specifications \u2014 EP-Aircraft Double Helical Gear<\/h2>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; box-sizing: border-box;\">\n<table style=\"width: 100%; border-collapse: collapse; table-layout: fixed; min-width: 480px;\">\n<thead>\n<tr style=\"background: linear-gradient(90deg,#1a2050 0%,#2a3a8a 60%,#3a50b0 100%);\">\n<th style=\"color: #fff; padding: 12px 14px; text-align: left; white-space: nowrap;\">Parameter<\/th>\n<th style=\"color: #fff; padding: 12px 14px; text-align: left; white-space: nowrap;\">Spesifikasi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f0f3fb;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Overall Dimension Range<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">\u03a63 mm \u2013 \u03a6120 mm<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Standard Dimension (nominal)<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">\u03a68 mm<\/td>\n<\/tr>\n<tr style=\"background: #f0f3fb;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Module Range<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">M0.15 \u2013 M2.0<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Standard Module<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">M0.2<\/td>\n<\/tr>\n<tr style=\"background: #f0f3fb;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Material Type<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Metal, Bronze, Steel, Alloy, POM, Zinc, Aluminium, Iron, Stainless, Brass, Copper<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Meshing Grade<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">ISO6, JGMA 1, JIS 6, AGMA 13, DIN 6, DIN 5, AGMA 12<\/td>\n<\/tr>\n<tr style=\"background: #f0f3fb;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Primary Applications<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Automotive, Military, Aircraft, Mechanical, Industrial, Medical<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Customisation<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">ODM \/ OEM \u2014 drawings, samples accepted<\/td>\n<\/tr>\n<tr style=\"background: #f0f3fb;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Sample Availability<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Sample available prior to batch order<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Packing Method<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Vacuum-packed with Plastic Tray<\/td>\n<\/tr>\n<tr style=\"background: #f0f3fb;\">\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">Delivery Modes<\/td>\n<td style=\"padding: 11px 14px; border-bottom: 1px solid #d0d8ef;\">DHL, UPS<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px;\">Quality Certificate<\/td>\n<td style=\"padding: 11px 14px;\">ISO 9001:2008 \/ TS16949<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<p><!-- Design and Context Section --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #f5f7fc; border: 1px solid #d0d8ef; border-radius: 6px; padding: 32px; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 16px 0;\">Double Helical Gear Design \u2014 Single vs Double Helical, and Comparison with Herringbone<\/h2>\n<p style=\"margin: 0 0 14px 0;\">Engineers choosing between single vs double helical gear configurations face a trade-off between simplicity and performance. A standard single helical gear is simpler to manufacture and easier to assemble, but requires thrust-bearing arrangements to react its axial force. The double helical gear eliminates that axial force \u2014 at the cost of greater manufacturing complexity and the need for a central groove or relief for tool runout during machining helical gears at this geometry.<\/p>\n<p style=\"margin: 0 0 14px 0;\">The double helical vs herringbone gear distinction is more than semantic. A continuous herringbone tooth (no groove) cannot be ground after hobbing \u2014 the grinding wheel cannot exit the tooth at the centreline. As a result, herringbone gears are limited to hobbed accuracy levels (typically DIN 7 or lower). The double helical gear \u2014 with its machined centre groove \u2014 can be finish-ground to AGMA 13 \/ ISO6, making it the only practical option for flight-critical precision applications. The centre groove also permits direct visual inspection of the tooth centreline and facilitates magnetic particle or dye-penetrant inspection along the full tooth length, an important consideration for aerospace quality assurance programmes in the United States, United Kingdom, Germany, and Japan.<\/p>\n<p style=\"margin: 0;\">In terms of double helical gear applications, this gear type appears in aircraft main rotor transmission gearboxes, turboprop reduction drives, aircraft accessory gearboxes (hydraulic pump, generator, fuel pump drives), naval propulsion gearboxes, large industrial turbine gearboxes, and precision medical imaging drives. The common thread across all these applications is the requirement for high power density, low noise, long maintenance intervals, and freedom from axial shaft loading. For engineers asking <em>what is a double helical gear used for<\/em> in a practical procurement context \u2014 the answer is: wherever a standard helical gear&#8217;s axial thrust force is unacceptable or where the contact ratio needs to be maximised without adding face width.<\/p>\n<\/div>\n<p>&nbsp;<\/p>\n<p><!-- Applications --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 20px 0;\">Application Scenarios \u2014 Where EP-Aircraft Double Helical Gears Are Used<\/h2>\n<p style=\"margin: 0 0 18px 0;\">The double helical gear application range covered by the EP-Aircraft series spans miniature precision instrument drives through to medium-duty aircraft accessory gearboxes. The following scenarios represent the primary deployment environments where the combination of thrust-free operation, high meshing grade, and multi-material flexibility deliver measurable engineering value.<\/p>\n<div style=\"display: flex; flex-wrap: wrap; gap: 16px; width: 100%; max-width: 100%; min-width: 100%; box-sizing: border-box;\">\n<div style=\"flex: 1 1 calc(33% - 16px); min-width: 210px; background: #f0f3fb; border: 1px solid #c8d0e8; border-radius: 6px; padding: 22px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Aircraft Accessory Gearboxes<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">The accessory gearbox mounted on an aircraft turbine engine drives hydraulic pumps, AC generators, fuel control units, and starter-generators \u2014 all simultaneously, from a single input shaft driven by the engine. Double helical gear stages are used in the accessory gearbox&#8217;s internal layshaft drives to eliminate axial bearing loads that would require oversized thrust bearings, adding weight that directly translates to reduced payload or fuel efficiency over the aircraft&#8217;s service life. The EP-Aircraft series modules from M0.5 to M2.0 cover the typical tooth sizes found in these drives.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(33% - 16px); min-width: 210px; background: #f0f3fb; border: 1px solid #c8d0e8; border-radius: 6px; padding: 22px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Rotorcraft Transmission Systems<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">Helicopter main rotor gearboxes operate under continuous high-torque loads at relatively low output speeds. The double helical gear is well-suited to these transmission stages: its self-centering axial float allows the gear to accommodate the flexural deflection of the gearbox housing under flight loads without imposing additional bearing misalignment loads. Rotorcraft gearbox engineers in Canada, the United States, and Europe have long specified double helical stages for the high-speed input shaft stages where noise and vibration transmission into the airframe must be minimised.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(33% - 16px); min-width: 210px; background: #f0f3fb; border: 1px solid #c8d0e8; border-radius: 6px; padding: 22px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Avionics &amp; Instrument Actuator Drives<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">At the miniature end of the module range \u2014 M0.15 to M0.5 \u2014 double helical gears appear in precision instrument drives: angle-of-attack sensors, autopilot actuators, radar antenna positioning drives, and navigation instrument geartrains. At these scales, stainless steel helical gears or POM material variants are often specified for their corrosion resistance or electrical non-conductivity. The EP-Aircraft series at this module range is produced to JGMA 1 or AGMA 13 meshing grade, ensuring consistent velocity transmission for sensor-class accuracy requirements.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(50% - 16px); min-width: 210px; background: #f0f3fb; border: 1px solid #c8d0e8; border-radius: 6px; padding: 22px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Military &amp; Defence Mechanical Systems<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">Military ground vehicle drives, naval auxiliary machinery, and weapons system actuation mechanisms all use double helical gear stages where quiet operation is a tactical requirement as much as an engineering preference. The double helical gear design&#8217;s inherently low transmission error and high contact ratio suppress gear noise harmonics at frequencies that acoustic sensors can detect. Defence programmes in Australia, the UK, and South Korea routinely specify double helical gearing for submarine and surface ship auxiliary drives, drone actuator systems, and armoured vehicle transmission subassemblies.<\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(50% - 16px); min-width: 210px; background: #f0f3fb; border: 1px solid #c8d0e8; border-radius: 6px; padding: 22px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 10px 0;\">Medical Imaging &amp; Surgical Robotic Drives<\/h3>\n<p style=\"margin: 0; color: #2a303a;\">Medical computed tomography (CT) scanners, MRI gantry drives, and surgical robotic arm joints require the same qualities as aircraft drives: high precision, low noise, long maintenance-free intervals, and thrust-free shaft loading. The compact outer diameter range \u2014 \u03a63 mm to \u03a6120 mm \u2014 of the EP-Aircraft double helical gear series accommodates the spatial constraints of medical instrument gearheads. Aluminium material variants are specified for weight-limited scanning array drives; stainless material variants are used where the gear may be exposed to surgical sterilisation cycles.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Related Products --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 20px 0;\">Related Products \u2014 Complete Helical Drive System from a Single Source<\/h2>\n<p style=\"margin: 0 0 18px 0;\">We manufacture the full range of helical gear types alongside the EP-Aircraft double helical gear series, enabling procurement teams and design engineers to source complete matched drive systems \u2014 gear, pinion, rack, and gearbox \u2014 without the quality and dimensional mismatches that arise from multi-supplier sourcing. Both products below complement the double helical gear series and are available on the same order.<\/p>\n<div style=\"display: flex; flex-wrap: wrap; gap: 18px; width: 100%; max-width: 100%; min-width: 100%; box-sizing: border-box;\">\n<div style=\"flex: 1 1 calc(50% - 18px); min-width: 260px; background: #fff; border: 1px solid #d0d8ef; border-radius: 6px; padding: 24px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 12px 0;\"><a style=\"color: #2a3a8a; text-decoration: underline;\" href=\"https:\/\/miter-gear.com\/helical-gear\/\" target=\"_blank\" rel=\"noopener\">Roda Gigi Heliks\u00a0<\/a><\/h3>\n<p style=\"margin: 0 0 14px 0; color: #2a303a;\">Our standard single-helix helical gear series spans module M0.5 through M6, in both right-hand and left-hand configurations, hobbed and ground variants. Where an application does not require the axial thrust elimination of a double helical gear, the standard helical gear provides a cost-effective parallel-shaft transmission option at the same material and quality grades. Matched helical gear sets \u2014 gear and helical pinion gear \u2014 are available from the same production run for tightest pair quality.<\/p>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px; display: block; margin-top: 14px;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-product-helical-gear.webp\" alt=\"Standard helical gear series for industrial and aerospace drives\" title=\"\"><\/p>\n<\/div>\n<div style=\"flex: 1 1 calc(50% - 18px); min-width: 260px; background: #fff; border: 1px solid #d0d8ef; border-radius: 6px; padding: 24px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0 0 12px 0;\"><a style=\"color: #2a3a8a; text-decoration: underline;\" href=\"https:\/\/superiortransmissioninc.com\/id\/gear-rack\/\">Gear Rack \u2014 Helical Rack and Pinion<\/a><\/h3>\n<p style=\"margin: 0 0 14px 0; color: #2a303a;\">For linear motion axes in aerospace ground support equipment, military vehicle traversing drives, and medical imaging scanner tables, our helical rack and pinion systems provide smooth, accurate linear displacement with the same quiet-running characteristics as their rotary helical gear counterparts. The helical rack tooth geometry is matched to our helical gear pinion series for correct helix angle pairing and consistent backlash control across the full stroke of the linear axis.<\/p>\n<p><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px; display: block; margin-top: 14px;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-related-product-gear-rack.webp\" alt=\"Helical rack and pinion for aerospace and precision linear drives\" title=\"\"><\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- About Us --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: linear-gradient(135deg,#f0f3fb 0%,#eaecf8 100%); border-radius: 6px; padding: 32px; margin-bottom: 28px; box-sizing: border-box; border-top: 3px solid #2a3a8a;\">\n<h2 style=\"color: #1a2050; margin: 0 0 16px 0;\">Tentang Fasilitas Manufaktur Kami<\/h2>\n<p style=\"margin: 0 0 14px 0;\">With over ten years of focused expertise in precision mechanical transmission manufacturing, our facility integrates design engineering, CNC gear machining, heat treatment, gear grinding, and coordinate-measuring inspection within a single production environment. Our core manufacturing programme covers agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, chains, and motors \u2014 produced across a broad range of materials including ductile iron, cast iron, cast steel, precision cast steel, and cast aluminium.<\/p>\n<p style=\"margin: 0 0 14px 0;\">The facility holds ISO 9001:2008 \/ TS16949 certification \u2014 the quality system standard adopted across automotive and aerospace supply chains globally. We design and produce custom gears, sprockets, worm gears, pulleys, shafts, and non-standard mechanical parts to customer-supplied drawings or samples, with full material and process traceability supporting the documentation requirements of aerospace and defence procurement standards.<\/p>\n<p style=\"margin: 0;\">Our export teams support procurement and engineering customers across Australia, the United Kingdom, Germany, Japan, South Korea, Canada, the Netherlands, and North America more broadly \u2014 providing technical data packages, material certifications, and sample evaluation units before batch order commitment. The helical gear factory is equipped for both standard catalogue supply and fully custom made helical gear production across the miniature-to-medium module range.<\/p>\n<\/div>\n<p><!-- Workshop Images --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; margin-bottom: 32px; box-sizing: border-box;\">\n<h3 style=\"color: #1a2050; margin: 0px 0px 16px; text-align: center;\">Bengkel<\/h3>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; box-sizing: border-box;\">\n<div style=\"display: flex; gap: 14px; width: max-content; padding-bottom: 10px;\"><img decoding=\"async\" style=\"height: 200px; width: 300px; object-fit: cover; border-radius: 4px; flex-shrink: 0;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/07\/superiortransmissioninc-factory-Workshop.webp\" alt=\"Gear manufacturing workshop floor\" title=\"\"><br \/>\n<img decoding=\"async\" style=\"height: 200px; width: 300px; object-fit: cover; border-radius: 4px; flex-shrink: 0;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/07\/superiortransmissioninc-factory-Drilling-and-Milling-Composite-Machining-Center.webp\" alt=\"Pusat permesinan komposit pengeboran dan penggilingan\" title=\"\"><br \/>\n<img decoding=\"async\" style=\"height: 200px; width: 300px; object-fit: cover; border-radius: 4px; flex-shrink: 0;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/07\/superiortransmissioninc-factory1.webp\" alt=\"Gambaran umum fasilitas produksi\" title=\"\"><br \/>\n<img decoding=\"async\" style=\"height: 200px; width: 300px; object-fit: cover; border-radius: 4px; flex-shrink: 0;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/07\/superiortransmissioninc-factory-Cylinder-Composite-Maching-Center.webp\" alt=\"Pusat permesinan komposit silinder\" title=\"\"><\/div>\n<\/div>\n<\/div>\n<p><!-- FAQ Section --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; margin-bottom: 28px; box-sizing: border-box;\">\n<h2 style=\"color: #1a2050; margin: 0 0 20px 0;\">Pertanyaan yang Sering Diajukan<\/h2>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #d0d8ef; border-radius: 6px; margin-bottom: 10px; background: #fff; overflow: hidden; box-sizing: border-box;\">\n<details style=\"width: 100%; box-sizing: border-box;\">\n<summary style=\"padding: 18px 22px; cursor: pointer; color: #1a2050; font-weight: bold; list-style: none; background: linear-gradient(90deg,#f0f3fb 0%,#f5f7fc 100%); display: flex; align-items: center;\">What are the main advantages of a double helical gear over a standard helical gear in an aircraft accessory gearbox application?<\/summary>\n<div style=\"padding: 18px 22px; color: #2a303a; border-top: 1px solid #d0d8ef;\">The primary advantage of a double helical gear in an aircraft accessory gearbox is the elimination of net axial thrust load on the shaft bearings. A single-helix helical gear generates an axial force proportional to the tangential force and the helix angle \u2014 in an engine accessory gearbox running multiple loads simultaneously, these axial forces accumulate and require dedicated thrust bearing arrangements that add weight and potential failure modes. The double helical gear cancels axial force internally, allowing smaller, lighter radial bearings throughout the gearbox. The secondary advantage is a higher total contact ratio \u2014 at least double that of a comparable single-helix stage \u2014 which reduces transmission error, lowers the vibration amplitude transmitted into the airframe, and extends gear surface fatigue life. Both advantages directly support the key performance metrics of aircraft gearbox design: low weight, low noise, and long time-between-overhaul intervals.<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #d0d8ef; border-radius: 6px; margin-bottom: 10px; background: #fff; overflow: hidden; box-sizing: border-box;\">\n<details style=\"width: 100%; box-sizing: border-box;\">\n<summary style=\"padding: 18px 22px; cursor: pointer; color: #1a2050; font-weight: bold; list-style: none; background: linear-gradient(90deg,#f0f3fb 0%,#f5f7fc 100%); display: flex; align-items: center;\">How is a double helical gear different from a herringbone gear, and which one is better suited for precision aerospace drives in the UK or Germany?<\/summary>\n<div style=\"padding: 18px 22px; color: #2a303a; border-top: 1px solid #d0d8ef;\">The practical difference between double helical vs herringbone gear comes down to manufacturability and achievable accuracy. A true herringbone gear has continuous teeth that meet at the centreline without a gap \u2014 this prevents the use of a tooth grinding wheel, which cannot exit at the centreline. Herringbone gears are therefore limited to hobbed accuracy (typically DIN 7 or coarser). A double helical gear has a machined centre groove between the two helical sections, which allows a tooth-grinding operation after hobbing. This grinding step enables the gear to achieve AGMA 13, DIN 5, or ISO6 meshing grade \u2014 levels required by UK and German aerospace procurement standards such as DEF STAN and Luftfahrtnorm specifications. For precision aerospace applications in these markets, the double helical gear is consistently the correct specification.<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #d0d8ef; border-radius: 6px; margin-bottom: 10px; background: #fff; overflow: hidden; box-sizing: border-box;\">\n<details style=\"width: 100%; box-sizing: border-box;\">\n<summary style=\"padding: 18px 22px; cursor: pointer; color: #1a2050; font-weight: bold; list-style: none; background: linear-gradient(90deg,#f0f3fb 0%,#f5f7fc 100%); display: flex; align-items: center;\">Which material should Australian or Canadian defence procurement engineers specify for a double helical gear used in a naval auxiliary drive exposed to salt-spray environments?<\/summary>\n<div style=\"padding: 18px 22px; color: #2a303a; border-top: 1px solid #d0d8ef;\">For naval auxiliary drive gears exposed to salt-spray environments \u2014 common in Australian and Canadian naval vessel auxiliary machinery \u2014 stainless steel helical gears are the most direct material solution when the load and speed conditions fall within the strength capability of stainless grades (typically 17-4PH, 15-5PH, or 316L for lower-stress applications). Where higher tooth load capacity is required alongside corrosion resistance, a conventional alloy steel double helical gear with a nickel-based surface coating or cadmium plating (for military-qualified applications) is the alternative approach. Bronze material variants are occasionally used for non-sparking requirements in explosive-atmosphere naval spaces. The EP-Aircraft series supports all of these material variants and can supply material certification traceable to the required defence standards on request.<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #d0d8ef; border-radius: 6px; margin-bottom: 10px; background: #fff; overflow: hidden; box-sizing: border-box;\">\n<details style=\"width: 100%; box-sizing: border-box;\">\n<summary style=\"padding: 18px 22px; cursor: pointer; color: #1a2050; font-weight: bold; list-style: none; background: linear-gradient(90deg,#f0f3fb 0%,#f5f7fc 100%); display: flex; align-items: center;\">Where can South Korean or Japanese aerospace OEMs source custom made double helical gears at module M0.2 with AGMA 13 meshing grade and sample approval before batch production?<\/summary>\n<div style=\"padding: 18px 22px; color: #2a303a; border-top: 1px solid #d0d8ef;\">South Korean and Japanese aerospace OEMs sourcing miniature double helical gears at module M0.2 to AGMA 13 quality need a helical gear factory that combines CNC hobbing at miniature scale, post-hobbing heat treatment, and CNC gear grinding \u2014 all with gear measurement equipment capable of resolving the sub-micron profile deviations that define AGMA 13. Our facility supports the full ODM\/OEM custom made helical gear process for miniature modules, including sample production and dimensional reporting against customer-supplied drawing tolerances before any batch commitment. Samples are packed in vacuum-sealed plastic trays and shipped via DHL or UPS with a full dimensional inspection report. This sample-first approach is standard practice for aerospace-grade procurement in these markets and is supported by our ISO 9001 \/ TS16949 quality system documentation.<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #d0d8ef; border-radius: 6px; margin-bottom: 10px; background: #fff; overflow: hidden; box-sizing: border-box;\">\n<details style=\"width: 100%; box-sizing: border-box;\">\n<summary style=\"padding: 18px 22px; cursor: pointer; color: #1a2050; font-weight: bold; list-style: none; background: linear-gradient(90deg,#f0f3fb 0%,#f5f7fc 100%); display: flex; align-items: center;\">What are the different types of helical gears and when should a double helical gear be used instead of a crossed helical or bevel helical configuration?<\/summary>\n<div style=\"padding: 18px 22px; color: #2a303a; border-top: 1px solid #d0d8ef;\">The main helical gear types in engineering practice are: standard parallel-shaft helical gears (single helix, left or right hand), double helical gears (opposing helix on the same gear body, parallel shafts, zero net axial thrust), crossed helical gears (non-parallel shaft transmission, lower efficiency, used in instrument drives), and bevel helical gears or helical bevel gearmotor configurations (intersecting shafts, right-angle drives). A double helical gear is the correct choice when three conditions coincide: parallel shafts (not bevel or crossed), high speed or power density requiring maximum contact ratio, and a bearing or housing arrangement where axial thrust force is undesirable or weight-prohibitive to accommodate. When shafts intersect at a right angle, a bevel helical or spiral bevel configuration is used instead. When shafts cross at a non-90\u00b0 angle, crossed helical gears apply. The double helical gear is specifically the parallel-shaft, high-performance option when thrust elimination and maximum tooth engagement are both required simultaneously.<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/div>\n<p style=\"text-align: right;\">Editor: PXY<\/p>","protected":false},"excerpt":{"rendered":"<p><span class=\"qk-md-text complete\" data-spm-anchor-id=\"5176.28103460.0.i10.cd8d2988p6MY7f\">Itu\u00a0<\/span><strong class=\"qk-md-strong complete\"><span class=\"qk-md-text complete\">Roda Gigi Heliks Ganda Pesawat EP<\/span><\/strong><span class=\"qk-md-text complete\">\u00a0is a high-precision transmission component engineered for demanding aerospace, automotive, and medical applications. Available in diameters from \u03a63mm to \u03a6120mm and modules ranging from M0.15 to M2.0, these gears are manufactured from versatile materials including steel, bronze, aluminum, and POM to meet specific weight and strength requirements. Designed to eliminate axial thrust, the double helical configuration ensures smooth, quiet operation at high speeds. The gears adhere to stringent international meshing standards, including ISO6, JGMA 1, DIN 5\/6, and AGMA 12\/13, guaranteeing exceptional accuracy. Fully customizable via ODM\/OEM services and certified under ISO 9001:2008\/TS16949, each unit is vacuum-packed for protection. Ideal for critical systems requiring reliable torque transmission and minimal vibration.<\/span><\/p>","protected":false},"featured_media":1604,"template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[62,60],"product_tag":[],"class_list":["post-1603","product","type-product","status-publish","has-post-thumbnail","product_cat-double-helical-gear","product_cat-helical-gear","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/product\/1603","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/media\/1604"}],"wp:attachment":[{"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/media?parent=1603"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/product_brand?post=1603"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/product_cat?post=1603"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/id\/wp-json\/wp\/v2\/product_tag?post=1603"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}