Heavy-Duty Herringbone Gear Shafts

1. Overview: What Are Herringbone Gear Shafts?

A herringbone gear shaft, also called a double helical gear shaft, is an integral one-piece forged transmission component. Its gear teeth feature a symmetrical herringbone structure, so the axial thrust generated by helical gears is mutually cancelled during operation. This eliminates the need for bearings that carry large axial loads, delivering smooth transmission, excellent impact resistance, and outstanding heavy-load capability.

2. Precision Machining & Manufacturing

Each gear shaft is manufactured through integral forging, quenching and tempering heat treatment, and precision gear machining (CNC hobbing, shaping, and grinding), ensuring accurate tooth profiles, tight tolerances, and high tooth surface strength with excellent wear resistance.

3. Premium Materials & Heat Treatment

Available in high-quality alloy steels such as 42CrMo, 17CrNiMo6, 20CrMnTi, and 40Cr, with carburizing, quenching, and tempering processes to achieve high surface hardness and strong core toughness. Flaw detection (ultrasonic/magnetic particle) is strictly performed to guarantee material integrity.

4. High Load Capacity & Smooth Power Transmission

The symmetrical double helical tooth design automatically balances axial forces, requiring no heavy axial-load bearings. This allows stable, low-noise, impact-resistant transmission under heavy loads and high torque in demanding low-speed applications.

5. Key Features & Advantages

Integral forged construction, high tooth surface strength, excellent wear resistance, smooth meshing, low noise, long service life, and precise keyway/spline machining for secure assembly.

6. Available Specifications & Custom Sizes

Custom manufacturing per drawings with adjustable module, tooth count, pressure angle, helix angle, and shaft end dimensions to match specific application requirements.

7. Applications & Industries

Widely used in heavy reducers, ball mills, mining machinery, metallurgical equipment, rolling mills, cement plants, conveyors, and gearboxes — ideal for high-power, low-speed transmission conditions.

8. Custom Manufacturing per Drawings

We produce gear shafts according to customer drawings or samples, supporting adjustments to module, tooth count, pressure angle, helix angle, and shaft end dimensions, with material selection from 42CrMo, 17CrNiMo6, and other premium alloy steels.

9. Quality Control & Third-Party Inspection

Strict quality control throughout: material inspection, flaw detection, heat treatment control, and tooth profile accuracy verification. Third-party inspection services are available upon request.

10. Global Export & Supply Capability

Products are exported to multiple countries and regions, with stable supply, large-batch delivery capability, and full-process compliant foreign trade services.

11. Why Choose Henan Sankuan Machinery Technology

Henan Sankuan Machinery Technology Co., Ltd. combines full CNC precision machining equipment, experienced engineering support, strict quality standards, and reliable export services — your trusted partner for heavy-duty gear shaft solutions.