{"id":1662,"date":"2026-09-10T02:18:17","date_gmt":"2026-09-10T02:18:17","guid":{"rendered":"https:\/\/superiortransmissioninc.com\/?post_type=product&p=1662"},"modified":"2026-09-10T02:28:14","modified_gmt":"2026-09-10T02:28:14","slug":"ep-industrial-double-helical-gear","status":"publish","type":"product","link":"https:\/\/superiortransmissioninc.com\/pl\/produkt\/ep-industrial-double-helical-gear\/","title":{"rendered":"EP-Industrial Double Helical Gear"},"content":{"rendered":"
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Industrial Power Transmission \/ Gear Solutions<\/p>\n

Precision-engineered double helical gears built for continuous heavy-duty industrial operation \u2014 delivering smooth torque transmission, reduced axial thrust, and exceptional service life across demanding global applications.<\/p>\n

Podw\u00f3jne ko\u0142o z\u0119bate \u015brubowe<\/a><\/p>\n<\/div>\n

Gear Type: Herringbone \/ Double Helical<\/span>
\nMaterial: Steel \/ Customized<\/span>
\nTooth Form: Herringbone<\/span>
\nShape: Round<\/span>
\nCapacity: Customized<\/span>
\nISO 9001:2015 Certified<\/span><\/div>\n

Technical Specification Parameters<\/h2>\n

The table below summarises the core technical parameters for the EP-Industrial double helical gear<\/strong> series. Because these gears are manufactured to customer drawings, values shown as “Customised” indicate dimensions that are specified per order. Standard ranges are provided as a reference for application engineers during early design stages. Requests outside these ranges can be assessed on an individual basis.<\/p>\n

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Parametr<\/th>\nEP-Industrial Double Helical Gear<\/th>\n<\/tr>\n<\/thead>\n
Typ przek\u0142adni<\/td>\nHerringbone \/ Double Helical<\/td>\n<\/tr>\n
Tooth Form<\/td>\nHerringbone (V-groove or continuous)<\/td>\n<\/tr>\n
Usage \/ Application<\/td>\nIndustrial heavy-duty power transmission<\/td>\n<\/tr>\n
Tworzywo<\/td>\nSteel (alloy, carbon, stainless); customised per specification<\/td>\n<\/tr>\n
Shape<\/td>\nRound (standard); custom flange or shaft-integrated forms available<\/td>\n<\/tr>\n
Module Range<\/td>\nM1 \u2013 M50 (metric); CP equivalent for inch helical gears<\/strong><\/td>\n<\/tr>\n
Helix Angle (each row)<\/td>\n15\u00b0 \u2013 45\u00b0 (symmetric opposing rows)<\/td>\n<\/tr>\n
Liczba z\u0119b\u00f3w<\/td>\nCustomised (typically 10 \u2013 300 T)<\/td>\n<\/tr>\n
Outer Diameter<\/td>\nCustomised (reference range: \u00f850 mm \u2013 \u00f82 000 mm)<\/td>\n<\/tr>\n
Face Width (total, both rows)<\/td>\nCustomised (reference range: 40 mm \u2013 800 mm)<\/td>\n<\/tr>\n
Bore Diameter<\/td>\nCustomised (solid, through-bore, or shrink-fit hub)<\/td>\n<\/tr>\n
Surface Hardness (typical)<\/td>\n58 \u2013 62 HRC (case-hardened); 280 \u2013 320 HB (through-hardened)<\/td>\n<\/tr>\n
Accuracy Grade<\/td>\nISO 1328 Grade 5 \u2013 9 (application-dependent)<\/td>\n<\/tr>\n
Obr\u00f3bka powierzchni<\/td>\nAs-ground, phosphated, blackened, or custom per requirement<\/td>\n<\/tr>\n
Capacity<\/td>\nCustomised (rated torque per project calculation)<\/td>\n<\/tr>\n
Standard jako\u015bci<\/td>\nISO 9001:2015; AGMA \/ DIN \/ ISO inspection available<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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What Is a Double Helical Gear?<\/h2>\n

A double helical gear<\/strong> \u2014 also widely recognised as a herringbone gear \u2014 features two rows of helical teeth cut in opposing helix angles on a single gear body. This V-shaped or chevron tooth arrangement is what sets the double helical gear design<\/strong> apart from a standard helical gear or spur gear. When the mating gears mesh, the thrust force generated by each angled tooth row is cancelled out by the equal and opposite force from the mirrored row. The result is a near-zero net axial load on bearings, a factor that is critically important in large industrial gearboxes, turbine drives, and parallel shaft transmissions where bearing longevity and shaft alignment are non-negotiable.<\/p>\n

The EP-Industrial series applies this time-proven double helical gear design<\/strong> philosophy to a precision-manufactured product line built for global industrial buyers. Every blank is machined from quality steel stock and subjected to rigorous dimensional inspection before tooth cutting. The final tooth profile \u2014 whether generated by hobbing, grinding, or a combination of both \u2014 meets international accuracy grades appropriate for the intended load and speed range. Customers working in steel rolling mills, mining conveyors, cement kilns, marine propulsion, and heavy industrial processing have relied on this type of gear for decades precisely because the advantages of double helical gear<\/strong> configurations are hard to replicate with any other gear geometry.<\/p>\n

Compared with a single helical gear, the double helical gear<\/strong> eliminates the need for thrust bearings to absorb axial loads, reduces vibration and acoustic emission, and enables the transmission of higher torque for a given centre distance. Compared with a spur gear, contact ratio is substantially improved, meaning each tooth carries load for a longer arc of engagement. These properties, taken together, explain why engineers consistently select the double helical gear<\/strong> wherever smooth, high-capacity, long-life power transmission is required.<\/p>\n<\/div>\n<\/div>\n

\"superiortransmissioninc-products-EP-Industrial<\/p>\n

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Five Key Advantages of Double Helical Gear<\/h2>\n
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\u2460 Axial Thrust Cancellation<\/h3>\n

One of the defining advantages of double helical gear<\/strong> is the self-balancing of axial forces. Because each half of the gear carries equal but opposing helix angles, thrust loads cancel internally rather than being transferred to shaft bearings. This protects bearing seats, extends bearing service intervals, and makes the double helical gear<\/strong> the preferred choice wherever axial load management is critical \u2014 including turbine-driven compressors, mill pinion drives, and high-speed parallel shaft gearboxes. Engineers who have migrated from single helical designs consistently report measurable improvements in bearing operating temperatures after switching.<\/p>\n<\/div>\n

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\u2461 Higher Torque Capacity per Unit Volume<\/h3>\n

The angled tooth geometry of a double helical gear<\/strong> enables a higher contact ratio than straight-cut spur gears, distributing the applied load across more tooth surface area at any given instant. This translates directly into a higher torque capacity for the same overall gear diameter and face width. When space and weight budgets are tight \u2014 as they are in gearboxes for wind turbines, rolling mill drives, and marine propulsion systems \u2014 the volumetric efficiency of the double helix gear<\/strong> geometry provides a meaningful engineering advantage over competing forms.<\/p>\n<\/div>\n

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\u2462 Smooth, Low-Noise Operation<\/h3>\n

The gradual tooth engagement characteristic of helical teeth \u2014 multiplied by the two-row arrangement in a double helical gear<\/strong> \u2014 produces exceptionally smooth power flow. Vibration amplitudes and noise signatures are substantially lower than those produced by spur gears at equivalent speeds and loads. This quality is particularly valued in food processing lines, pharmaceutical manufacturing, and precision machine tools where vibration can compromise product quality or process accuracy. The helical gear design<\/strong> achieves low noise not by accident but because the inclined tooth entry distributes impact energy over time rather than concentrating it at the moment of mesh.<\/p>\n<\/div>\n

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\u2463 Extended Operational Lifespan<\/h3>\n

Lower axial loading, improved load distribution, and reduced vibration collectively produce a gear that simply wears more slowly than comparable alternatives. Steel helical gear<\/strong> sets manufactured from appropriate alloy steel, heat-treated to achieve the right core toughness and surface hardness, and finished to accurate tooth profiles will routinely deliver many years of service in continuous-duty industrial installations. Proper lubrication \u2014 matched to the operating speed and temperature \u2014 sustains the elastohydrodynamic film on tooth flanks that is responsible for keeping metal-to-metal contact to a minimum throughout the service life of the double helical gear<\/strong>.<\/p>\n<\/div>\n

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\u2464 Fully Customisable to Application Requirements<\/h3>\n

Unlike catalogue gears with fixed dimensions, the EP-Industrial double helical gear<\/strong> series is engineered to order. Module, number of teeth, helix angle, face width, bore diameter, keyway geometry, and surface treatment are all specified per project. Custom made helical gears<\/strong> are produced with CNC hobbing and precision grinding equipment, and dimensional reports accompany each shipment. Whether a customer requires inch helical gears<\/strong> to metric-to-imperial conversion, stainless steel helical gears<\/strong> for corrosive environments, or high-capacity double helical gear<\/strong> sets for a rolling mill rebuild, the manufacturing process adapts to the brief.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

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How a Double Helical Gear Works<\/h2>\n

Understanding the working principle of a double helical gear<\/strong> begins with the geometry of a single helical tooth. When a helical gear rotates, each tooth enters mesh at one edge of the face width and progressively engages across the full tooth width before disengaging at the opposite edge. This gradual engagement is what produces the smooth, quiet running that characterises helical gear<\/strong> operation. The trade-off is that the inclined tooth generates a side load \u2014 an axial thrust force \u2014 proportional to the tangential tooth force and the tangent of the helix angle.<\/p>\n

In a double helical gear<\/strong>, this problem is resolved by pairing two helical sections with equal but opposite helix angles on the same gear body, separated by a central groove or cut into a continuous V-profile. As the gear rotates, the axial thrust from the left-hand helix section is continuously balanced by the equal thrust from the right-hand section. The internal cancellation means the net force transmitted to the shaft and bearings is purely tangential \u2014 the useful driving force \u2014 with no residual axial component to be absorbed by thrust bearings.<\/p>\n

From a lubrication standpoint, the double helical gear<\/strong> benefits from the same EHD film mechanism as other precision gear types. At normal industrial pitch-line velocities, the sliding and rolling motion at the tooth contact zone generates sufficient pressure to maintain a separating oil film. This film \u2014 thicker at higher speeds, thinner at very low speeds \u2014 is what converts what would otherwise be metal-to-metal sliding contact into a predominantly hydrodynamic interaction, dramatically reducing wear rates. Proper lubricant viscosity selection for the operating temperature and speed range is the single most important maintenance factor in maximising double helical gear<\/strong> service life.<\/p>\n

The distinction between double helical vs herringbone gear<\/strong> is largely semantic in modern usage. Historically, a herringbone gear had no central groove \u2014 the two helix rows met at a sharp ridge \u2014 while a double helical gear had a machining groove between the two rows. Modern CNC gear cutting equipment can produce both forms, and the terms are frequently used interchangeably in industrial practice. Both operate on identical principles and deliver comparable performance; the central groove version simply allows easier hobbing tool runout during helical gear machining<\/strong>.<\/p>\n<\/div>\n

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Material, Quality & Manufacturing Standards<\/h2>\n

The material selection for a double helical gear<\/strong> is determined by the application’s torque, speed, operating environment, and required service life. The EP-Industrial series accommodates a broad range of helical gear material<\/strong> specifications. The most commonly specified base materials include:<\/p>\n