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Product Description
Engineered for Maximum Reliability and Torque Transmission in Critical Applications
Yile Machinery is a leading manufacturer of large, custom-engineered herringbone (double helical) gears for the most demanding industrial environments. We specialize in producing robust cast steel gears for heavy-lift cranes, rolling mills, mining equipment, and other applications where operational reliability is paramount.
Our integrated manufacturing process—from custom casting and heat treatment to precision gear cutting—ensures your critical machinery runs smoothly, minimizing downtime and maximizing productivity.
The double helical design of a herringbone gear offers significant advantages for high-torque systems:
Extreme Load Capacity: The dual-angled teeth provide multiple points of contact, allowing for a greater load-bearing surface area compared to standard spur gears.
Zero Axial Thrust: The opposing helical patterns counterbalance axial forces, eliminating the need for complex thrust bearings and reducing stress on the gearbox housing.
Smooth and Quiet Operation: The gradual engagement of the helical teeth ensures smooth, continuous power transfer, reducing vibration and operational noise even under immense load.
Manufacturing a gear of this scale requires specialized expertise and equipment. Our process is designed to guarantee material integrity and mechanical performance.
Custom Steel Casting: We begin by casting the gear blank using high-strength alloy steels like 35XM (34CrMo4, AISI 4135) or other customer-specified materials. The casting process is carefully controlled to prevent porosity and ensure a solid, homogenous internal structure.
Advanced Heat Treatment: The raw casting undergoes a multi-stage heat treatment cycle to achieve the optimal balance of hardness and toughness:
Normalizing/Annealing: To refine the grain structure and relieve internal stresses from casting.
Quenching & Tempering: To achieve the required core strength and toughness to withstand shock loads.
Surface Hardening (Optional): Induction or flame hardening can be applied to the teeth for enhanced wear resistance in specific applications.
Precision Machining & Gear Cutting: Using large-capacity CNC lathes and specialized gear hobbing/shaping machines, we machine the gear to your exact dimensional specifications, ensuring precise tooth profiles and concentricity.
Rigorous Quality Assurance: Before shipment, every gear is subject to a strict inspection protocol, including:
Non-Destructive Testing (NDT): Ultrasonic (UT) and Magnetic Particle (MT) inspection to verify the casting is free of internal and surface defects.
Dimensional Inspection: CMM or manual verification of all critical dimensions.
Hardness Testing: To confirm the heat treatment results meet your engineering requirements.
Our large herringbone gears are the trusted choice for:
Steel Mills: Overhead crane hoists, transfer cars, and rolling mill drives.
Mining & Excavation: Hoist and drive gears for large shovels, draglines, and crushers.
Ports & Maritime: Crane gears for ship-to-shore (STS) cranes and gantry cranes.
Cement Plants: Girth gears for kilns and grinding mills.
Power Generation: Gearboxes for wind turbines and other power systems.
Partner with a Heavy Gear Specialist
Your critical operations demand a reliable partner. Submit your technical drawings, material specifications, and application details. Our engineering team will provide a comprehensive quote for a gear solution built to last.
