Large Custom Helical Gears for Heavy Industrial Applications

Yile Machinery is a specialist in the engineering and manufacturing of large-diameter, custom helical gears. We produce mission-critical components for the world's most demanding industries, from mining and power generation to marine and steel production. By combining advanced materials with large-scale precision machining, we deliver gears that provide superior strength, durability, and performance.

Expertise in High-Strength Alloy Steels

The performance of a heavy-duty gear is defined by its material. We have extensive experience working with high-performance alloys designed for extreme stress and fatigue resistance.

• Featured Material: 30CrNiMo8 (1.6580)

This high-tensile, high-toughness alloy steel is the material of choice for gears subjected to heavy dynamic loads. Its excellent hardenability allows for a deep and uniform hardness through the gear body, providing exceptional strength and resistance to wear and impact.

• Other Available Alloys: We also manufacture gears from a wide range of certified materials, including 42CrMo (AISI 4140) , 34CrNiMo6, and other carbon and alloy steels to meet your specific application requirements.

Our Precision Manufacturing Process: From Steel to Gear

We manage the entire manufacturing process to ensure uncompromising quality.

1. Material Sourcing & Forging: We begin with certified alloy steel, typically in the form of a forged blank. Forging provides a superior grain structure for maximum strength and fatigue life, which is essential for large, critical gears.

2. CNC Machining: The forged blank is rough and finish machined on heavy-duty CNC lathes and milling centers to precise dimensions.

3. Large-Scale Gear Hobbing: Using our specialized large-diameter gear hobbing machines, we cut the helical teeth with precise control over the helix angle, tooth profile, and lead.

4. Advanced Heat Treatment: The gear undergoes a controlled Quenching and Tempering (Q&T) process to achieve the specified core hardness and toughness required by the engineering drawing.

5. Precision Gear Grinding: For applications requiring the highest accuracy and quietest operation, we perform finish grinding on the gear teeth after heat treatment. This ensures an optimal surface finish and perfect tooth geometry.

Manufactured to Your Exact Specifications ("Nonstandard")

As a custom gear manufacturer, we build parts to your print. We can accommodate a full range of specifications:

• Diameter: From medium to very large-scale diameters.

• Gear Parameters: Module, Pressure Angle, Helix Angle, and Tooth Profile modifications.

• Material & Hardness: Specific alloy steel and target hardness (HB or HRC).

• Quality Standard: Manufactured to meet AGMA or DIN/ISO quality levels.

• Full Traceability: We provide material certificates and inspection reports as required.

Request a Quote for Your Large Gear Project

Send your technical drawings and RFQ to our engineering team. Partner with us to manufacture your large, high-strength helical gears with confidence.