Custom Spur Gears – Forged & CNC Machined Steel Gear Components
Our custom spur gears are engineered for demanding mechanical power transmission systems requiring stable torque delivery, low noise, and long service life.Manufactured from forged steel blanks and finished through precision CNC machining, our spur gears are designed to meet OEM specifications for accuracy, durability, and reliability.
Through an integrated production workflow—including hot forging, CNC machining, gear cutting, heat treatment, and full dimensional inspection—Weforging supplies forged spur gears tailored to customer drawings and application requirements.
High-Quality Materials for Superior Mechanical Strength
To meet the needs of different industries, our spur gears can be manufactured using a wide range of high-performance steels. Common material options include:
20CrMnTi – Excellent for carburizing; widely used in automotive and gearbox gears
20MnCr5 / 16MnCr5 – High hardenability with uniform case depth after heat treatment
42CrMo / 4140 – High strength and toughness for heavy-duty gears
40Cr – Stable properties for medium-load gear applications
Alloy steels (35CrMo, 34CrNiMo6) – Enhanced fatigue strength for high-speed or high-impact applications
Each material is selected based on load conditions, required hardness, and working environment, ensuring optimal adaptability for OEM customers.
Flexible Specifications and Custom Dimensions
We manufacture custom spur gears strictly according to customer drawings or sample requirements. Typical specifications include:
Module (M): M1–M16
Number of teeth: 8–200 teeth
Outer diameter: 30 mm – 500 mm
Tooth hardness: HRC 58–62 (carburized), HRC 45–55 (induction hardened)
Bore type: Smooth bore, keyed bore, spline bore
Surface finish: Ra ≤ 0.8 μm on machined surfaces
Tolerance: IT6–IT8 depending on application
All tolerances and heat-treat parameters can be tailored according to GB, DIN, ISO, ANSI, or customer-specific standards.
Advanced Manufacturing Process
Each custom spur gear undergoes a controlled, multi-stage manufacturing process to ensure consistent mechanical performance and dimensional accuracy.
1. Hot Forging
The forging process produces a dense, uniform grain flow structure that significantly improves strength, fatigue resistance, and impact toughness compared with cast gears.
The gear blank is precisely machined to ensure proper concentricity, bore tolerance, and hub geometry—critical factors for stable gear meshing.
3. Gear Cutting / Hobbing / Shaping
Involute tooth profiles are formed using gear hobbing, shaping, or milling. Optional gear grinding is available for high-precision or low-noise applications.
Depending on the application, gears may be treated by carburizing & quenching, induction hardening, or through-hardening to achieve a hard wear-resistant surface and a tough inner core.
5. Final Finishing & Inspection
All gears undergo final deburring, oil coating, and 100% dimensional inspection using CMM or gear measuring equipment.
Advantages of Spur gears
High load capacity due to forged structure and optimized tooth geometry
Excellent wear resistance from case-hardened tooth surfaces
Smooth and quiet operation with accurate involute profiles
Long service life even under continuous and heavy-duty use
Superior reliability through integrated quality control and testing
These advantages make the gear ideal for environments requiring consistent power transmission and long-term stability.
Wide Range of Applications
Our forged spur gears are widely applied in various industries, including:
Industrial gearboxes and speed reducers: torque transmission for conveyors, mixers, and automated production lines
Agricultural machinery: gear drives in tractors, combine harvesters, balers, and PTO systems
Construction equipment: swing drives in excavators, gear trains in loaders, hoisting mechanisms in cranes, and drives in concrete machinery
Automotive and off-highway vehicles: differential gears, transfer case mechanisms, and auxiliary drive modules
Hydraulic pumps and motors: precise gear engagement for stable fluid displacement and pressure control
Mining and metallurgical machinery: drive systems for crushers, screening machines, rolling mills, and heavy-duty processing equipment
Across all these applications, Weforging’s spur gears provide dependable performance, strong load capacity, and long-term operational stability.
Conclusion
Weforging manufactures custom spur gears that deliver reliable performance under demanding operating conditions. By combining forged steel blanks, precision CNC machining, controlled heat treatment, and comprehensive inspection, we provide gear solutions aligned with OEM requirements for strength, accuracy, and service life.
Contact our engineering team for project evaluation, quotations, or tailored gear specifications.
