Jinjiang Feida Machinery Co., Ltd.
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Steel Helical Gear Components

Steel helical gear components deliver superior load distribution and quiet operation in automotive, industrial, and heavy machinery applications. Our portfolio covers complete transmission solutions, from Alloy Helical Transmission Gears engineered for high-torque environments to precision-matched Metal Helical Pinion Sets that reduce backlash and improve meshing accuracy. For larger drive assemblies, Metallic Helical Gear Wheels provide consistent surface fatigue resistance, and Industrial Helical Metal Gear Parts can be customized for unique mounting patterns and bore configurations. Each gear set is machined from forged alloy billets, then finish-ground to DIN Class 6 or tighter to ensure minimal noise under high-speed operation.


Steel Helical Gear Components are manufactured from quenched and tempered alloy steels such as 20CrMnTi, 42CrMo, and 17CrNiMo6, with optional case-hardening depths from 0.8 mm to 2.0 mm. The standard manufacturing route includes CNC hobbing, heat treatment, and profile grinding, which delivers a tooth surface roughness of Ra 0.4–0.8 µm. Typical use cases include conveyor drives, wind turbine pitch systems, and hydrostatic transmission pumps. Key specifications are listed below.

  • Module range: 1.0 mm to 12 mm, custom up to 20 mm
  • Pressure angle: 20° standard, 14.5° or 25° optional
  • Helix angle: 10° to 30°, with left-hand or right-hand orientation
  • Accuracy grade: DIN 6 to DIN 9, AGMA 10 to 12
  • Surface hardness: 58–62 HRC after carburizing and grinding
  • Maximum torque capacity: 850 N·m for standard shafted pinions
  • Heat treatment options: gas carburizing, induction hardening, nitriding
  • Corrosion resistance: black oxide or phosphate coating available
ParameterStandard RangeCustom Range
Outer diameter40 mm – 600 mmUp to 1,200 mm
Face width10 mm – 150 mmUp to 250 mm
Bore diameter8 mm – 120 mmUp to 200 mm
Number of teeth12 – 120Up to 200
Material20CrMnTi, 42CrMo, 17CrNiMo6Stainless steel, nitriding steel
Tooth surface roughness0.4–0.8 µm Ra0.2 µm Ra after superfinishing

All components are supplied with full dimensional inspection reports and material certifications. Additional services include custom bore configurations, keyway cutting, and matched gear pairing for reduced transmission error.

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