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Product Description
When you are driving a multi-ton ball mill, a massive rotary kiln, or a steel rolling stand, you need more than just a gear—you need an engineered solution built for extreme torque and unwavering reliability. Yile Machinery manufactures large module spur gear shafts, like this Module 50 pinion, designed to be the powerhouse of your most demanding industrial applications.
Manufacturing a gear of this scale and strength requires a mastery of metallurgy and machining. Our process is built on three pillars that guarantee performance under the most extreme conditions.
We begin with a solid billet of high-grade alloy steel (e.g., 42CrMo, 18CrNiMo7-6, or customer-specified) that is forged to its near-net shape. Forging aligns the steel’s internal grain flow with the gear's contours, eliminating internal defects and creating a component with vastly superior impact strength and fatigue resistance compared to castings or parts machined from bar stock.
A gear of this magnitude demands a specialized heat treatment to create two critical properties:
Case Hardening (Carburizing): The gear undergoes a carburizing process, where carbon is diffused into the surface of the teeth.
Quenching & Tempering: When quenched, this carbon-rich surface forms an incredibly hard "case" (up to 62 HRC) that resists wear and pitting. The core of the gear remains softer and tougher, allowing it to absorb shock loads without fracturing. This dual-property structure is essential for long service life in heavy-duty cycles.
After heat treatment, the gear teeth are finished on our large-capacity gear grinding machines. This critical final step ensures:
High Gear Accuracy (AGMA/DIN Standard): Guarantees a perfect tooth profile for smooth, efficient meshing and load distribution.
Superior Surface Finish: Reduces friction, minimizes noise, and lowers operating temperatures.
Maximum Performance: A ground gear transmits torque more effectively and has a significantly longer operational lifespan than a non-ground gear.
The cost of failure in a heavy industrial setting is immense. That is why every large module gear shaft we produce is rigorously inspected before shipment.
Forging Integrity: 100% Ultrasonic Testing (UT) to guarantee the raw forging is free from internal voids.
Surface Perfection: Magnetic Particle Inspection (MPI) to ensure the gear teeth and shaft are free from any surface cracks.
Dimensional & Profile Accuracy: Full inspection using Coordinate Measuring Machines (CMM) and specialized gear measurement equipment to verify that every dimension, from the tooth profile to the bearing journals, is perfect.
Our large module gear shafts are the driving force in a wide range of heavy industries:
Mining & Mineral Processing: As the main pinion for Ball Mills, SAG Mills, and Crushers.
Cement & Aggregates: As the primary drive pinion for Rotary Kilns and Grinding Mills.
Steel Manufacturing: In the gearboxes of large Rolling Mills.
Power Generation & Marine: For large industrial gearboxes and propulsion systems.
Discuss Your Heavy-Duty Gear Requirements
Provide your technical drawings and application details. Our engineering team is ready to partner with you to produce a large module gear shaft that meets your exact needs.
