Custom Spur Gears Manufacturer for Industrial Applications
Precision-engineered spur gears built to your drawings — reduce downtime, improve transmission efficiency, and replace OEM parts faster.
What is a Spur Gear
External Spur Gears
Internal Spur Gears
Gear shafts
Keyway / Spline Spur Gears
Gear Rack & Pinion Systems
Planetary Spur Gear Components
Gear Parameters We Can Produce
1.Module: 2 – 40
2.Diameter: up to 3000 mm
3.Gear Accuracy: DIN 5 – DIN 9
4.Pressure Angle: 14.5° / 20° / Custom
5.Tooth Profile: Involute / Modified
6.Heat Treatment:Quenching & Tempering /Carburizing/Induction Hardening
Surface: Grinding / Honing / Polishing
Materials Available
We typically use:
45 / C45 / ASTM 1045 → General transmission
42CrMo / 4140 → High load & fatigue resistance
40CrNiMo / 4340 → Heavy-duty applications
20CrMnTi / 18CrNiMo7-6 → Carburized gears
👉 Material selection is determined by:
Load conditions
Surface hardness requirement
Service life expectations
Designed for Heavy-Duty & Continuous Operation
Our spur gears are widely used in:
1.Steel Plants & Rolling Mills
2.Mining Equipment
3.Conveyor Systems
4.Industrial Gearboxes
5.Automation & Robotics
6.Pumps & Heavy Machinery
👉 Designed for high load, continuous operation, and harsh environments
We are not just a supplier — we solve real production problems
PRT Metal operates a vertically integrated gear manufacturing facility — covering gear cutting, heat treatment, surface finishing, and dimensional inspection entirely in-house. We produce external spur gears, internal ring gears, gear shafts, and gear racks to DIN 5–9accuracy across modules M0.5 to M50 and diameters up to 3000 mm. From drawing review and material selection through to first-article validation and full inspection documentation, we provide the technical transparency and manufacturing accountability that demanding industrial applications require.
Listen to what they say about our gears
“We supplied PRT Metal with our gear drawings for a critical gearbox application. The delivered spur gears passed our incoming CMM inspection on the first batch — zero deviations from the DIN 7 tolerance call-outs. That level of dimensional consistency is rare from an overseas supplier.”
“We placed a production order for 800 units of custom gear shafts with a firm delivery deadline. PRT Metal not only met the 40-day lead time but also provided weekly production progress updates and shipped with full material certs and inspection reports. Our supply chain team now treats them as a preferred vendor.”
“Our application required a modified involute tooth profile with induction hardening and post-grind finishing — specifications that most suppliers declined. PRT Metal’s engineering team reviewed our drawings within 24 hours, confirmed feasibility, and delivered a prototype that matched every parameter. We have since moved three product lines to PRT Metal.”
Frequently asked questions
PRT Metal manufactures spur gears with modules ranging from M0.2 to M40 and outer diameters up to 3000 mm. Large-module gears above M16 are typically produced from 42CrMo or cast steel and are designed for heavy-duty industrial applications such as mining, cement processing, and large drive systems. Please submit your drawing for a manufacturing feasibility assessment.
We manufacture spur gears to DIN 5 through DIN 9 accuracy grades. Accuracy verification is performed using a dedicated gear measuring center that measures profile deviation, lead deviation, pitch error, and total composite error. A full gear inspection report is issued with every production batch as standard documentation.
PRT Metal offers three primary heat treatment processes:
- Carburizing & Case Hardening — surface hardness up to 58–62 HRC, suitable for high-contact-stress gears
- Induction Hardening — selective hardening of tooth flanks with minimal distortion
- Quenching & Tempering (Q&T) — through-hardening for high-torque, heavy-load applications
Post heat treatment, gears are inspected for dimensional deviation, and re-grinding or honing is performed where required to restore DIN accuracy grade compliance.
Yes. While our standard material range includes 45# Steel, 40Cr, 42CrMo, 20CrMnTi, and Stainless Steel 304/316, we can source and process customer-specified material grades upon request. Full material mill certificates are provided with every order, and incoming raw material is verified against chemical composition requirements before entering production.
Standard lead times are 15–20 business days for prototype and sample orders, and 30–45 business days for production batches, depending on complexity, module size, and heat treatment requirements. MOQ is flexible and discussed based on part complexity and production volume — contact our team to discuss your specific project requirements.
Yes. PRT Metal supplies rack and pinion systems as matched and tested gear sets, ensuring proper backlash control and meshing accuracy for linear positioning applications. Custom rack lengths, pinion bore configurations, keyways, and surface treatments are all available. Both straight-tooth and helical rack configurations can be produced to customer drawings.
We provide the best
Partnering with PRT Metal is straightforward and efficient. Follow these simple steps to get started with your Gears:
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Get a Free Quote
Submit your drawing or specifications today — our engineering team responds within 24 hours.
Contact our expert team
- Phone
- +86 17751766219
- Address
- No. 18, Xingao Road, Niutang Town, Wujin District, Changzhou, Jiangsu Province, China
