{"id":1666,"date":"2026-09-10T02:26:44","date_gmt":"2026-09-10T02:26:44","guid":{"rendered":"https:\/\/superiortransmissioninc.com\/?post_type=product&#038;p=1666"},"modified":"2026-09-10T02:28:21","modified_gmt":"2026-09-10T02:28:21","slug":"ep-carbon-steel-double-helical-gear","status":"publish","type":"product","link":"https:\/\/superiortransmissioninc.com\/sv\/produkt\/ep-carbon-steel-double-helical-gear\/","title":{"rendered":"Dubbelspiralv\u00e4xel i EP-kolst\u00e5l"},"content":{"rendered":"<div style=\"width: 100%; max-width: 100%; min-width: 100%; font-family: Georgia,serif; color: #222; line-height: 1.75; box-sizing: border-box;\">\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: linear-gradient(135deg,#f4f6f0 0%,#e6ede0 100%); padding: 36px 24px 32px; box-sizing: border-box; border-bottom: 3px solid #2d5016;\">\n<p style=\"color: #3a5c1a; margin: 0 0 10px;\">Material: Carbon Steel \u00a0|\u00a0 Thickness: 50 \u2013 150 mm \u00a0|\u00a0 Hobbing Capacity: 5 \u2013 100 mm \u00a0|\u00a0 Pressure Angle: 20\u00b0<\/p>\n<p style=\"color: #3a5c1a; margin: 0;\">Material Grade: SS304 (base stock) \u00a0|\u00a0 Fully Customizable \u00a0|\u00a0 Factory-Direct Supply<\/p>\n<\/div>\n<p><!-- 5 Key Advantages --><\/p>\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Tekniska specifikationer<\/h2>\n<p>The following table summarizes the standard parameters of the EP-Carbon Steel <strong>double helical gear<\/strong>. All values marked as customizable can be specified per customer drawing or application requirement. Contact our engineering team for non-standard module, helix angle, or surface treatment requirements.<\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch;\">\n<table style=\"width: 100%; min-width: 580px; border-collapse: collapse; table-layout: fixed;\">\n<thead>\n<tr style=\"background: linear-gradient(90deg,#2d5016 0%,#5a8a2e 100%); color: #fff;\">\n<th style=\"padding: 12px 14px; text-align: left; border: 1px solid #b0c890;\">Parameter<\/th>\n<th style=\"padding: 12px 14px; text-align: left; border: 1px solid #b0c890;\">Standard Value<\/th>\n<th style=\"padding: 12px 14px; text-align: left; border: 1px solid #b0c890;\">Customizable Range<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">V\u00e4xeltyp<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Dubbelspiralv\u00e4xel<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">\u2014<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Material<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Carbon Steel (C45, 40Cr, 20CrMnTi)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Alloy steel, customized per spec<\/td>\n<\/tr>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Material Grade (Base Stock)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">SS304 \/ Carbon steel, customized<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Per customer drawing<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Thickness (Face Width)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">50 \u2013 150 mm<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Customized per application<\/td>\n<\/tr>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Hobbing Capacity<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">5 \u2013 100 mm<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">\u2014<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Pressure Angle<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">20\u00b0<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">14.5\u00b0 available<\/td>\n<\/tr>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Modul<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">M1 \u2013 M20 (standard)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Non-standard module on request<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Helix Angle (each half)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">15\u00b0 \u2013 35\u00b0 (opposing)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Up to 45\u00b0 per requirement<\/td>\n<\/tr>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Antal t\u00e4nder<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">10 \u2013 300 (custom)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Per specification<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Tooth Flank Hardness<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">HRC 50 \u2013 62 (case-carburized)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Through-hardened or normalized<\/td>\n<\/tr>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Precision Grade<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">DIN 6 \u2013 8 \/ AGMA 10 \u2013 12<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">DIN 5 on request (ground)<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Ytbehandling<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Blackening \/ phosphating<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Zinc plating, nickel plating, bare<\/td>\n<\/tr>\n<tr style=\"background: #f4f6f0;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Max Pitch-Line Velocity<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Up to 25 m\/s (ground grade)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Per gear grade and lubrication<\/td>\n<\/tr>\n<tr style=\"background: #fff;\">\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Outer Dimensions (L \u00d7 OD)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Per drawing (e.g., 100 mm \u00d7 250 mm)<\/td>\n<td style=\"padding: 11px 14px; border: 1px solid #c8d8b0;\">Fully customizable<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #f4f6f0; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Five Key Advantages of the Carbon Steel Double Helical Gear<\/h2>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; display: flex; flex-wrap: wrap; gap: 16px; box-sizing: border-box;\">\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-top: 3px solid #5a8a2e; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">High Torque Capacity<\/h3>\n<p style=\"margin: 0;\">Carbon steel grades used in this <strong>double helical gear<\/strong> achieve significantly higher bending strength and surface hardness than many alternative materials after heat treatment. Through-hardening or case-carburizing brings the tooth flank hardness to the range needed for heavy continuous-duty drives \u2014 conveyor systems, large parallel shaft gearboxes, and mill drives \u2014 without the geometric distortion risk of bulk through-hardening in thicker sections. The result is a <strong>double helical gear<\/strong> that sustains high torque loads reliably over long service intervals.<\/p>\n<\/div>\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-top: 3px solid #5a8a2e; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Self-Balancing Axial Thrust<\/h3>\n<p style=\"margin: 0;\">Like every <strong>double helical gear<\/strong> in this family, the carbon steel variant features two mirror-image helical tooth rows whose axial force vectors cancel each other. Shaft bearings carry radial load only, extending their operating life and removing the need for dedicated thrust bearing arrangements. This is one of the core <strong>advantages of double helical gear<\/strong> geometry over single helical designs and is especially valuable in heavily loaded applications where thrust bearing maintenance is costly or operationally disruptive.<\/p>\n<\/div>\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-top: 3px solid #5a8a2e; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Wide Thickness Range \u2014 50 to 150 mm<\/h3>\n<p style=\"margin: 0;\">The available face width range of 50 to 150 mm makes this <strong>double helical gear<\/strong> adaptable across a broad spectrum of drive sizes. Narrower face widths suit compact gearbox stages where space is constrained; wider faces increase torque capacity and load sharing across the helical tooth contact. Selecting the right face width for a given application is part of the <strong>double helical gear design<\/strong> process our engineering team supports, ensuring the gear you order is correctly proportioned for the transmitted power and required service life.<\/p>\n<\/div>\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-top: 3px solid #5a8a2e; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Precision Hobbing to 100 mm<\/h3>\n<p style=\"margin: 0;\">Hobbing capacity of 5 to 100 mm covers the range from small-module pinion gears through to medium-large industrial gear stages. Hobbing is the preferred process for <strong>helical gear machining<\/strong> at scale because it generates consistent involute profiles with repeatable accuracy across a production batch. Our gear hobbing machines are calibrated to deliver tooth profile and lead deviations within DIN tolerance bands, and post-hobbing grinding is available for applications requiring the tightest precision grades.<\/p>\n<\/div>\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-top: 3px solid #5a8a2e; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Full Custom Configuration<\/h3>\n<p style=\"margin: 0;\">Gear module, pressure angle, number of teeth, helix angle, bore diameter, keyway dimensions, surface treatment, and material grade are all open to specification. Our manufacturing team can work from customer drawings, sample gears, or a set of operating parameters \u2014 speed, power, ratio, centre distance \u2014 and back-calculate the required <strong>double helical gear<\/strong> geometry. Custom made helical gears are a core part of what we do, and first-article samples with dimensional inspection reports can be supplied before production quantities are released.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- How It Works --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Working Principle of the Double Helical Gear<\/h2>\n<p>To understand why the <strong>double helical gear<\/strong> occupies the upper tier of parallel-shaft gear technology, it helps to trace exactly what happens during mesh. As the driving gear rotates, engagement with the mating pinion begins at a single point on one edge of the tooth \u2014 not across the entire face simultaneously, as occurs with a spur gear. This point of contact then travels diagonally along the tooth flank in a smooth rolling motion until it exits at the opposite end. Meanwhile the next tooth pair has already begun to engage, so the load is always shared across at least two tooth pairs and often more. This is the contact ratio advantage that helical teeth deliver regardless of whether the gear is single or double helical.<\/p>\n<p>What distinguishes the <strong>double helical gear<\/strong> is the second set of helical teeth, angled in the exact opposite direction to the first. As the left-hand helix tries to push the gear axially to the left, the right-hand helix generates an equal and opposite force to the right. These cancel, leaving the gear shaft in a state of near-zero axial thrust. No external thrust bearings are required to absorb this load. In a heavily loaded carbon steel <strong>double helical gear<\/strong> transmitting hundreds of kilowatts, the forces that would otherwise stress the thrust bearing arrangement are entirely resolved within the gear mesh itself \u2014 a mechanically elegant solution that directly improves drivetrain reliability.<\/p>\n<p>The relief groove visible at the center of most <strong>double helical gears<\/strong> is a feature of the manufacturing process rather than a structural element. It allows the hobbing cutter to exit the tooth space after generating each helix without interfering with the opposing set. This groove makes the carbon steel <strong>double helical gear<\/strong> straightforward to manufacture on standard gear-cutting equipment and easy to inspect dimensionally, without compromising its mechanical performance.<\/p>\n<\/div>\n<p><!-- Material & Quality --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #eef2e8; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Material, Heat Treatment &amp; Quality Assurance<\/h2>\n<p>Carbon steel is selected for the EP-Carbon Steel <strong>double helical gear<\/strong> because it provides an optimal balance between raw material strength, heat-treatment response, machinability, and economy. Depending on the application duty and required hardness profile, we work with medium-carbon grades such as C45 or 40Cr, and high-alloy case-hardening grades such as 20CrMnTi or 17CrNiMo6 for demanding high-cycle applications. The specific helical gear material grade is confirmed at the quotation stage based on the transmitted torque, required hardness, and operating environment the customer describes.<\/p>\n<p>The heat treatment sequence for a typical carbon steel <strong>double helical gear<\/strong> begins with normalizing or annealing after forging to relieve residual stresses in the blank. Rough machining and semi-finishing follow, after which the gear undergoes carburizing, quenching, and low-temperature tempering \u2014 or induction hardening where surface hardness is required without full-depth carburization. After heat treatment, gear grinding corrects any thermal distortion in the tooth profile, ensuring the finished gear meets the declared DIN or AGMA precision grade. All stages are documented in our process traveller, and customers requesting material test certificates, hardness reports, and dimensional inspection data can have these included as part of the delivery package.<\/p>\n<p>Our facility holds ISO 9001:2015 certification and applies this quality framework to every batch of carbon steel <strong>double helical gears<\/strong>. Traceability from raw material heat number through to final inspection record is maintained for every order, making this product a credible choice for OEM programs with rigorous supplier qualification requirements as well as for one-off replacement gear orders in European, North American, and Asia-Pacific markets.<\/p>\n<p style=\"text-align: center; margin-top: 22px;\"><a style=\"display: inline-block; background: #5a8a2e; color: #fff; padding: 13px 32px; border-radius: 4px; text-decoration: none; letter-spacing: 0.04em;\" href=\"https:\/\/superiortransmissioninc.com\/sv\/double-helical-gear\/\">Dubbelspiralv\u00e4xel\u00a0<\/a><\/p>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; padding: 32px 24px; box-sizing: border-box;\">\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-1667\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-products-EP-Carbon-Steel-Double-Helical-Gear.webp\" alt=\"superiortransmissioninc-products-EP-Carbon Steel Double Helical Gear\" width=\"800\" height=\"800\" title=\"\" srcset=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-products-EP-Carbon-Steel-Double-Helical-Gear.webp 800w, https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-products-EP-Carbon-Steel-Double-Helical-Gear-480x480.webp 480w\" sizes=\"auto, (min-width: 0px) and (max-width: 480px) 480px, (min-width: 481px) 800px, 100vw\" \/><\/div>\n<\/div>\n<p><!-- Double Helical Gear Design Considerations --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #f4f6f0; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Double Helical Gear Design: Engineering the Right Solution<\/h2>\n<p>Good <strong>double helical gear design<\/strong> starts with a clear picture of the operating conditions: transmitted power, input speed, gear ratio, duty cycle, and any constraints on center distance or housing envelope. From these inputs, the gear designer calculates the required module \u2014 which controls tooth size and bending strength \u2014 and selects a helix angle that delivers an adequate contact ratio without making the gear unnecessarily wide or difficult to machine. For carbon steel <strong>double helical gears<\/strong> in heavy-industrial service, helix angles between 25\u00b0 and 35\u00b0 per half are common, as they balance load distribution, noise performance, and the practicalities of helical gear milling at large face widths.<\/p>\n<p>Material selection follows from the stress calculations. Medium-carbon grades like C45 are adequate for moderate-speed, moderate-load applications where cost matters and surface hardness requirements are not extreme. For higher duty \u2014 higher pitch-line velocities, shock loading, or longer required life \u2014 case-hardening alloy steels like 20CrMnTi or 17CrNiMo6 are specified. The <strong>helical gear material<\/strong> choice and heat treatment sequence are not independent decisions: the carburizing depth, quench severity, and tempering temperature all interact to set the final hardness profile across the tooth, and getting this right is central to achieving the rated load capacity of the finished <strong>double helical gear<\/strong>.<\/p>\n<p>Tooth profile modifications \u2014 tip relief, profile crowning, and lead crowning \u2014 are increasingly standard practice on precision carbon steel <strong>double helical gears<\/strong> for high-speed or heavily loaded applications. Tip relief reduces the dynamic load spike that occurs at tooth entry and exit, which otherwise causes noise and accelerates tooth surface fatigue. Lead crowning compensates for minor shaft deflections and housing bore misalignment, ensuring the load is not concentrated at the tooth edges. These modifications are straightforward to implement during gear grinding and contribute meaningfully to the service life of the finished gear.<\/p>\n<\/div>\n<p><!-- Applications --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Application Scenarios for Carbon Steel Double Helical Gears<\/h2>\n<p>Carbon steel <strong>double helical gears<\/strong> cover the broadest range of heavy industrial drive applications. Their combination of high strength, established heat-treatment pathways, and competitive material cost makes them the workhorses of industrial power transmission worldwide \u2014 from German steel mills to mining operations in Australia, from cement plants in the Middle East to paper mills in Scandinavia. The following application categories represent where the EP-Carbon Steel <strong>double helical gear<\/strong> is most frequently specified.<\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; display: flex; flex-wrap: wrap; gap: 16px; margin-top: 20px; box-sizing: border-box;\">\n<div style=\"flex: 1 1 240px; max-width: 100%; background: #f4f6f0; border: 1px solid #c8d8b0; border-radius: 4px; padding: 18px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Rolling Mill &amp; Metalworking Drives<\/h3>\n<p style=\"margin: 0;\">Hot strip and plate rolling mills place enormous shock and overload demands on gear trains. Carbon steel <strong>double helical gears<\/strong> in these applications are typically case-carburized to achieve a hard wear surface over a tough core \u2014 a hardness profile that resists both tooth face pitting and bending fatigue. The large face widths available in this product range, up to 150 mm, allow the torque to be distributed across a wide tooth contact zone, keeping Hertz contact stresses within design limits even under peak rolling loads.<\/p>\n<\/div>\n<div style=\"flex: 1 1 240px; max-width: 100%; background: #f4f6f0; border: 1px solid #c8d8b0; border-radius: 4px; padding: 18px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Mining, Quarrying &amp; Bulk Materials Handling<\/h3>\n<p style=\"margin: 0;\">Conveyor drive gearboxes, ball mill pinions, and crusher gear stages in the global mining sector rely on carbon steel <strong>double helical gears<\/strong> for their toughness and repairability. When a gear does eventually wear in a remote mining operation in Western Australia, the Andes, or sub-Saharan Africa, carbon steel is the most readily replaceable material with the broadest local support network for heat treatment and machining. The self-balancing axial thrust of the <strong>double helical gear<\/strong> also reduces the total bearing count required in multi-stage conveyor gearboxes, simplifying maintenance.<\/p>\n<\/div>\n<div style=\"flex: 1 1 240px; max-width: 100%; background: #f4f6f0; border: 1px solid #c8d8b0; border-radius: 4px; padding: 18px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Cement &amp; Minerals Processing<\/h3>\n<p style=\"margin: 0;\">Kiln drives, raw mill gearboxes, and finish mill gear stages in cement plants are among the highest-torque, lowest-speed continuous-duty applications in industry. Carbon steel <strong>double helical gears<\/strong> in these drives are typically large in diameter with wide faces, and are specified with normalized or through-hardened tooth profiles to maximize toughness under the slow-rolling, high-load conditions typical of a cement plant drivetrain. The <strong>double helical gear uses<\/strong> in this sector span both helical pinion gears driving large bull gears and fully matched <strong>double helical gear<\/strong> sets within multi-stage speed reducers.<\/p>\n<\/div>\n<div style=\"flex: 1 1 240px; max-width: 100%; background: #f4f6f0; border: 1px solid #c8d8b0; border-radius: 4px; padding: 18px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Power Transmission &amp; Speed Reducers<\/h3>\n<p style=\"margin: 0;\">The carbon steel <strong>double helical gear<\/strong> is a natural fit for helical gear reducers and parallel shaft gearbox assemblies serving general manufacturing, water treatment, chemical process, and agricultural industries globally. Mid-range module carbon steel <strong>double helical gears<\/strong> in the 5 to 15 m module range cover most industrial speed reducer requirements, and the 20\u00b0 pressure angle standard in this product range is compatible with the majority of existing parallel shaft gearbox designs \u2014 simplifying replacement or upgrade projects without requiring a complete housing redesign.<\/p>\n<\/div>\n<div style=\"flex: 1 1 240px; max-width: 100%; background: #f4f6f0; border: 1px solid #c8d8b0; border-radius: 4px; padding: 18px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Marine Auxiliary Drives<\/h3>\n<p style=\"margin: 0;\">Beyond main propulsion systems \u2014 which often use stainless or higher-alloy steels \u2014 marine auxiliary drives for anchor winches, deck machinery, and cargo handling equipment frequently specify carbon steel <strong>double helical gears<\/strong> for their cost efficiency and availability. The balanced axial load and smooth mesh behavior of the <strong>double helical gear<\/strong> reduce vibration transmission to the ship&#8217;s structure, which matters both for structural fatigue and for crew comfort on passenger vessels and ferries operating in European and Asia-Pacific routes.<\/p>\n<\/div>\n<div style=\"flex: 1 1 240px; max-width: 100%; background: #f4f6f0; border: 1px solid #c8d8b0; border-radius: 4px; padding: 18px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\">Agricultural Machinery &amp; PTO Gearboxes<\/h3>\n<p style=\"margin: 0;\">High-ratio PTO (power take-off) gearboxes on large tractors and combine harvesters increasingly incorporate <strong>double helical gear<\/strong> stages at the high-speed input end, where noise and efficiency are critical. Carbon steel grades are the standard choice for agricultural gearbox applications because they withstand the intermittent overloads and dusty operating conditions of field equipment without the cost premium of alloyed or stainless grades. Inch helical gears for North American OEM programs can also be produced to AGMA inch standards as part of the custom service offering.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- Comparison Section --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Carbon Steel vs Stainless Steel Double Helical Gear \u2014 Which Should You Choose?<\/h2>\n<p>When specifying a <strong>double helical gear<\/strong>, the material choice between carbon steel and stainless steel is driven primarily by the operating environment rather than by mechanical performance targets. Carbon steel <strong>double helical gears<\/strong> outperform stainless on raw load capacity at comparable cost \u2014 medium and high-carbon grades respond better to case-carburizing, achieving surface hardness levels above HRC 60 that are difficult to sustain in austenitic stainless grades. For the same module and tooth count, a carbon steel gear will typically carry more torque for longer before the onset of tooth surface pitting.<\/p>\n<p>Stainless steel <strong>double helical gears<\/strong>, conversely, are the right choice when corrosion resistance is the dominant design driver \u2014 food processing, pharmaceutical, marine environments with chloride exposure, and wash-down-intensive production lines. The superior corrosion resistance of austenitic stainless grades means the tooth flanks remain smooth and dimensionally stable over service intervals where a carbon steel gear would corrode, roughen, and generate debris that contaminates the lubricant and accelerates wear throughout the gear stage.<\/p>\n<p>For buyers comparing <strong>single vs double helical gear<\/strong> options within a carbon steel range, the double helical configuration adds manufacturing complexity \u2014 the hobbing sequence is more involved and a relief groove must be carefully positioned \u2014 but the elimination of axial thrust and the gain in contact ratio make it the superior engineering choice for any application where shaft and bearing loads need to be minimized and noise levels are a specification requirement. In a properly designed parallel shaft gearbox, carbon steel <strong>double helical gears<\/strong> deliver a compelling combination of strength, longevity, and smooth operation that spur gears at comparable cost simply cannot match.<\/p>\n<\/div>\n<p><!-- Related Products --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #f4f6f0; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Related Products \u2014 Complete Drivetrain from One Source<\/h2>\n<p>Our manufacturing capability spans the full range of components that work alongside the <strong>double helical gear<\/strong> in a complete drivetrain assembly. Specifying matched components from a single manufacturing source simplifies engineering documentation, guarantees dimensional compatibility, and streamlines procurement across your project.<\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; display: flex; flex-wrap: wrap; gap: 20px; margin-top: 20px; box-sizing: border-box;\">\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\"><a style=\"color: #5a8a2e; text-decoration: none;\" href=\"https:\/\/miter-gear.com\/helical-gear\/\" target=\"_blank\" rel=\"noopener\">Spiralv\u00e4xel<\/a><\/h3>\n<p>Our full range of standard and precision helical gears covers single helical profiles in both metric and inch module, including helical pinion gears, helical spur gear variants, and helical gearsets for matched pair installation. Whether a project calls for a small helical gear driving an encoder shaft or a large hobbed gear in a multi-stage speed reducer, our helical gear manufacturing process produces consistent tooth profiles across the entire size range. These gears are dimensionally compatible with our carbon steel <strong>double helical gear<\/strong> range and are available in the same alloy steel grades, making mixed-stage gearbox builds straightforward. Our engineering team can supply complete gearset drawings and mating tooth specifications for system-level verification.<\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; text-align: center; margin-top: 14px;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-product-helical-gear.webp\" alt=\"Helical gear range\" title=\"\"><\/div>\n<\/div>\n<div style=\"flex: 1 1 280px; max-width: 100%; background: #fff; border: 1px solid #c8d8b0; border-radius: 4px; padding: 20px; box-sizing: border-box;\">\n<h3 style=\"color: #2d5016; margin-top: 0;\"><a style=\"color: #5a8a2e; text-decoration: none;\" href=\"https:\/\/superiortransmissioninc.com\/sv\/gear-rack\/\">Kuggst\u00e5ng<\/a><\/h3>\n<p>Precision gear rack manufactured to match our helical pinion gear range, enabling helical rack and pinion systems for linear motion applications. Our gear rack is produced in carbon and alloy steel grades with hobbed or ground tooth profiles, and is available in metric module to complement the EP-Carbon Steel <strong>double helical gear<\/strong> series where a rotary-to-linear conversion stage is required downstream of the gearbox output. Typical applications for matched helical rack and pinion sets include CNC gantry systems, automated guided vehicle drive modules, heavy-duty sliding gates, and machine tool carriages operating in manufacturing plants across Europe, North America, and the Asia-Pacific region. Supplying both the gearbox <strong>double helical gear<\/strong> stages and the downstream gear rack from a single source ensures consistent module, pressure angle, and surface quality across the entire drive system.<\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; text-align: center; margin-top: 14px;\"><img decoding=\"async\" style=\"max-width: 100%; height: auto; border-radius: 4px;\" src=\"https:\/\/superiortransmissioninc.com\/wp-content\/uploads\/2026\/09\/superiortransmissioninc-related-product-gear-rack.webp\" alt=\"Gear rack linear motion product\" title=\"\"><\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><!-- About Us --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; background: #2d5016; color: #e8ede0; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #fff; border-left: 4px solid #a0c870; padding-left: 14px; margin-top: 0;\">About Our Gear Manufacturing Facility<\/h2>\n<p>With more than ten years of focused experience in mechanical power transmission, our factory has developed the process capability and engineering depth to serve demanding customers in heavy industry, marine, agricultural, and general manufacturing sectors worldwide. Our product range spans agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, chains, and motors \u2014 all manufactured under the same quality framework and available through a single point of contact.<\/p>\n<p>We are ISO 9001:2015 certified and design and manufacture a comprehensive range of industrial and agricultural gearbox assemblies using ductile iron, cast iron, cast steel, precision cast steel, and cast aluminum, alongside machined gears, sprockets, worm gears, pulleys, worms, shafts, and both standard and non-standard mechanical parts. Our helical gear factory is equipped with CNC gear hobbing machines, gear grinding centers, coordinate measuring machines, and a dedicated heat treatment facility \u2014 the complete production chain required to deliver a <strong>double helical gear<\/strong> from raw bar stock to finished, inspected, and documented component. Customers across Europe, North America, Australia, Southeast Asia, and the Middle East source carbon steel <strong>double helical gears<\/strong> from us as a factory-direct helical gear supplier, benefiting from engineering support, transparent documentation, and the quality consistency that ISO certification brings.<\/p>\n<\/div>\n<p><!-- FAQ --><\/p>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; padding: 32px 24px; box-sizing: border-box;\">\n<h2 style=\"color: #2d5016; border-left: 4px solid #5a8a2e; padding-left: 14px; margin-top: 0;\">Vanliga fr\u00e5gor<\/h2>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #c8d8b0; border-radius: 4px; margin-bottom: 10px; overflow: hidden;\">\n<details style=\"width: 100%; max-width: 100%; min-width: 100%;\" open=\"open\">\n<summary style=\"padding: 16px 18px; background: #f4f6f0; cursor: pointer; font-weight: bold; color: #2d5016; list-style: none;\">What are the main advantages of using a carbon steel double helical gear over a standard spur gear in a heavy-duty industrial gearbox in Europe or North America?<\/summary>\n<div style=\"padding: 16px 18px; background: #fff; color: #333;\">\n<p style=\"margin: 0;\">For heavy-duty gearboxes in European or North American industrial plants, the carbon steel <strong>double helical gear<\/strong> delivers three primary advantages over a spur gear: significantly higher contact ratio \u2014 meaning more teeth share the load at any instant \u2014 elimination of net axial thrust on the shaft and bearings, and notably quieter operation at speed. Spur gears engage abruptly across the full tooth face, which generates a dynamic impact force at each mesh cycle. Helical teeth enter progressively, smoothing that load transition. The double helical arrangement removes the axial force that the single helical tooth geometry would introduce, allowing shaft bearings to be sized for radial load only. In practice this means a more compact bearing arrangement, a quieter gearbox, and often a longer service interval between planned maintenance stoppages.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #c8d8b0; border-radius: 4px; margin-bottom: 10px; overflow: hidden;\">\n<details style=\"width: 100%; max-width: 100%; min-width: 100%;\" open=\"open\">\n<summary style=\"padding: 16px 18px; background: #f4f6f0; cursor: pointer; font-weight: bold; color: #2d5016; list-style: none;\">How is a carbon steel double helical gear manufactured, and what precision tolerances are realistic for a custom order destined for a mining application in Australia?<\/summary>\n<div style=\"padding: 16px 18px; background: #fff; color: #333;\">\n<p style=\"margin: 0;\">De <strong>helical gear manufacturing process<\/strong> for a carbon steel <strong>double helical gear<\/strong> proceeds through CNC blank turning, gear hobbing of each helix half in sequence with the relief groove machined between them, heat treatment (carburizing, quenching, and tempering for case-hardened grades), and gear grinding to correct any thermal distortion. For mining applications in Australia, customers typically request DIN Grade 6 to 7 or equivalent AGMA accuracy, which covers most ball mill pinion and conveyor gearbox applications without the premium of ground Grade 5. Material certifications, hardness reports, and dimensional inspection records are supplied as standard with mining-sector orders. Lead time for a custom carbon steel <strong>double helical gear<\/strong> in the 50 to 150 mm face width range is typically 4 to 8 weeks from drawing approval, depending on blank availability and the heat treatment schedule.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #c8d8b0; border-radius: 4px; margin-bottom: 10px; overflow: hidden;\">\n<details style=\"width: 100%; max-width: 100%; min-width: 100%;\" open=\"open\">\n<summary style=\"padding: 16px 18px; background: #f4f6f0; cursor: pointer; font-weight: bold; color: #2d5016; list-style: none;\">Which carbon steel grade works best for a double helical gear operating in a cement plant kiln drive in the Middle East or Southeast Asia?<\/summary>\n<div style=\"padding: 16px 18px; background: #fff; color: #333;\">\n<p style=\"margin: 0;\">Cement kiln drives present a demanding combination of high torque, low speed, and continuous duty \u2014 sometimes running 24 hours a day for months between shutdowns. For this application in Middle Eastern or Southeast Asian cement plants, the preferred <strong>helical gear material<\/strong> is typically a case-carburizing alloy steel such as 20CrMnTi or 17CrNiMo6, which achieves a hard, fatigue-resistant tooth surface (HRC 58\u201362 case) over a tough, ductile core that absorbs shock loads without brittle fracture. Through-hardened grades like 42CrMo4 are an alternative where the full-depth hardness is preferable to a surface-hardened profile \u2014 common in very large modulus gears where carburizing depth is difficult to achieve uniformly. The specific grade recommendation depends on the module, gear diameter, and tooth root section thickness, which our engineering team evaluates as part of the quotation process.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #c8d8b0; border-radius: 4px; margin-bottom: 10px; overflow: hidden;\">\n<details style=\"width: 100%; max-width: 100%; min-width: 100%;\" open=\"open\">\n<summary style=\"padding: 16px 18px; background: #f4f6f0; cursor: pointer; font-weight: bold; color: #2d5016; list-style: none;\">Where can I find a reliable helical gear supplier that produces custom double helical gears with full material documentation for an OEM program in Germany or the UK?<\/summary>\n<div style=\"padding: 16px 18px; background: #fff; color: #333;\">\n<p style=\"margin: 0;\">OEM programs in Germany and the UK typically require a helical gear supplier with demonstrable ISO 9001:2015 quality certification, documented <strong>helical gear machining<\/strong> and heat treatment processes, and the ability to supply first-article inspection reports, material test certificates, and ongoing SPC data if required. Our facility meets all of these criteria. We export carbon steel <strong>double helical gears<\/strong> to European OEM customers routinely, and we maintain English-language engineering documentation, CE-compatible quality records, and the dimensional reporting formats (DIN measurement protocols) that European buyers expect. Enquiries from German and UK engineering teams are welcomed with a formal quotation including material traceability information and a proposed inspection plan.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<div style=\"width: 100%; max-width: 100%; min-width: 100%; border: 1px solid #c8d8b0; border-radius: 4px; margin-bottom: 10px; overflow: hidden;\">\n<details style=\"width: 100%; max-width: 100%; min-width: 100%;\" open=\"open\">\n<summary style=\"padding: 16px 18px; background: #f4f6f0; cursor: pointer; font-weight: bold; color: #2d5016; list-style: none;\">What is the difference between a double helical gear and a herringbone gear, and does it matter for a conveyor drive gearbox in a North American mining or aggregate operation?<\/summary>\n<div style=\"padding: 16px 18px; background: #fff; color: #333;\">\n<p style=\"margin: 0;\">The terms <strong>herringbone gear vs double helical<\/strong> describe the same basic geometry \u2014 two opposing helical tooth sets on a single gear body \u2014 but differ in one manufacturing detail. A true herringbone gear has a continuous V-shaped tooth profile with no break between the two helices; a <strong>double helical gear<\/strong> (in the strict sense) includes a central relief groove machined between the two helical sections to allow cutter clearance during hobbing. For conveyor drive gearboxes in North American mining and aggregate operations, the practical difference is negligible: both eliminate net axial thrust and deliver the same load-sharing benefits. The grooved <strong>double helical gear<\/strong> is more common because it is accessible to manufacture on standard hobbing equipment and is easier to inspect dimensionally. Unless the application specifically requires the continuous herringbone profile \u2014 which narrows the supplier base and typically extends lead time \u2014 the grooved <strong>double helical gear<\/strong> is the more cost-effective and readily available choice.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n<\/div>\n<p style=\"text-align: right;\">Redakt\u00f6r: PXY<\/p>","protected":false},"excerpt":{"rendered":"<p>The EP-Carbon Steel double helical gear is engineered for industrial power transmission environments where load capacity, toughness, and cost-efficiency all matter.<\/p>\n<p>The double helical tooth geometry of this gear brings the same mechanical advantages found across the entire double helical gear product family: opposing helix angles that cancel axial thrust internally, higher contact ratios than spur gears, and smoother, quieter mesh behavior under load. The EP-Carbon Steel variant is dimensioned with a thickness range of 50 to 150 mm and a hobbing capacity of 5 to 100 mm, making it a practical solution for mid-to-large scale parallel shaft gearbox builds, industrial conveyor drives, and heavy-process machinery across sectors from steel production to mining, quarrying, cement, and general manufacturing. All geometric parameters \u2014 module, number of teeth, helix angle, bore diameter, and keyway \u2014 are available for custom specification to match your existing drivetrain.<\/p>","protected":false},"featured_media":1667,"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-1666","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\/sv\/wp-json\/wp\/v2\/product\/1666","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/media\/1667"}],"wp:attachment":[{"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/media?parent=1666"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/product_brand?post=1666"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/product_cat?post=1666"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/superiortransmissioninc.com\/sv\/wp-json\/wp\/v2\/product_tag?post=1666"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}