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Product Description
In applications demanding immense torque capacity and smooth power transmission, the herringbone gear is the ultimate solution. Its unique double helical design naturally balances axial thrust, eliminating the need for complex thrust bearings and increasing system reliability. Yile Machinery specializes in manufacturing forged steel, continuous herringbone gear shafts—the most robust and power-dense variant of this design.
The key feature of our premium herringbone gears is the continuous tooth profile, where the left and right-hand helices meet at a sharp apex with no central gap or groove.
This advanced design, which requires specialized manufacturing, delivers significant performance advantages:
Maximum Torque Capacity: The continuous tooth structure provides a greater effective face width, increasing the surface contact area and allowing for the transmission of higher loads.
Enhanced Strength & Rigidity: Eliminating the central gap creates a stronger, more rigid gear blank that is less prone to deflection under extreme torque.
Smoother, Quieter Operation: The seamless transfer of load between the opposing helices results in exceptionally smooth and quiet power transmission.
Producing a continuous herringbone gear shaft is a process of precision and metallurgical control.
Material Forging: We begin with high-grade alloy steel (such as 42CrMo, 34CrNiMo6, or custom specifications) that is forged to shape. This refines the steel's grain structure, aligning it with the gear's form for unparalleled fatigue resistance and impact strength.
Specialized Gear Cutting: Unlike standard gears that can be hobbed, continuous herringbone teeth require advanced machining methods. We utilize:
Gear Shaping: Using special cutters to precisely generate the tooth profile right up to the apex.
5-Axis CNC Milling: For large or highly complex gear profiles, offering ultimate design flexibility.
Precision Heat Treatment: The gear shaft undergoes a tailored heat treatment cycle, often involving carburizing, quenching, and tempering. This creates an extremely hard, wear-resistant tooth surface (up to 62 HRC) while maintaining a tough, ductile core to absorb shock loads.
Final Profile Grinding: After hardening, the gear teeth are precision ground to achieve a perfect involute profile, excellent surface finish, and the highest possible gear quality standard (e.g., AGMA or DIN class).
Every herringbone gear shaft we produce is subject to a comprehensive quality control protocol to guarantee its performance.
100% Ultrasonic Testing (UT) on the raw forging to ensure internal purity.
Magnetic Particle Inspection (MPI) on the finished gear to verify surface integrity.
Coordinate Measuring Machine (CMM) & Gear Profile Measurement to confirm that lead, profile, pitch, and runout are all within the specified tolerance.
Hardness and Case Depth Verification.
Our herringbone gear shafts are engineered for the most demanding environments, including:
Steel & Aluminum Rolling Mills
Marine Propulsion Gearboxes
Large Industrial Pumps and Compressors
Mining Equipment (e.g., Ball Mills, Crushers)
Plastic Extruders
Get a Quote for a Custom Herringbone Gear Shaft
Provide your technical drawings, material requirements, and application details. Our engineering team will partner with you to deliver a gear solution built for maximum reliability.
