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Help CenterExternal Ring Gear Custom Machined From 4140 Steel Heat Treated Precision Ring Gear DIN 6 Standard
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Henan San Kuang Machinery Technology Co., Ltd. proudly presents our Custom Machined External Ring Gear – a precision-engineered component crafted from premium 4140 steel, subjected to rigorous heat treatment and manufactured to meet the stringent DIN 6 standard. As a dedicated gear manufacturer with over a decade of experience, we combine advanced CNC machining capabilities with strict quality control to deliver ring gears that excel in strength, durability, and dimensional accuracy. Our ring gears are designed for high-torque, heavy-load applications across multiple industries, ensuring seamless power transmission and extended service life.
The 4140 alloy steel provides an excellent balance of toughness, wear resistance, and fatigue strength. Through a carefully controlled heat treatment process (quenching and tempering), we achieve a hardness range of 28–32 HRC, optimizing the gear for demanding environments. Each gear is then precision-machined to meet DIN 6 tolerance class, which guarantees tight runout and pitch accuracy. Whether you need a standard design or a fully custom configuration, our engineering team can adapt to your specific requirements.
Key Features & Technical Specifications
- Material Excellence: 4140 steel (AISI/SAE 4140) – known for high tensile strength (up to 1020 MPa after heat treatment) and good ductility.
- Heat Treatment: Quenched and tempered to achieve uniform hardness; optional case hardening or nitriding available upon request.
- Precision Grade: Manufactured to DIN 6 standard – typical pitch deviation ≤ 0.025 mm and runout ≤ 0.03 mm (dependent on gear size).
- Custom Machining: We can produce external ring gears with module range 1–20 mm, outer diameter up to 2500 mm, and face width up to 400 mm.
- Tooth Finishing: Gear hobbing, shaping, or grinding as required; surface roughness Ra ≤ 0.8 μm achievable on tooth flanks.
- Quality Assurance: 100% dimensional inspection using CMM, gear analyzers, and hardness testers; compliance with ISO 9001:2015 and other standards.
| Parameter | Value / Range | Remark |
|---|---|---|
| Material | 4140 steel (AISI) | Equivalent to 40Cr, 42CrMo |
| Hardness (after HT) | 28–32 HRC (standard) | Other ranges possible |
| Module (m) | 1 – 20 mm | Customizable |
| Outer Diameter (max) | 2500 mm | Larger diameters via segmented design |
| Face Width (max) | 400 mm | Depends on blank size |
| Precision Grade | DIN 6 | Can achieve DIN 5 upon request |
| Tooth Profile | Involute (standard) | Custom profiles available |
| Surface Treatment | Black oxide, phosphate, or as specified | Optional |
Advantages & Customer Benefits
- Enhanced Load Capacity: The heat-treated 4140 steel core, combined with precise tooth geometry, ensures reliable operation under high radial and axial loads, reducing downtime.
- Long Service Life: Optimal hardness and surface finish minimize wear, extending gear life in continuous-duty applications such as kilns, ball mills, and crushers.
- Noise & Vibration Control: DIN 6 accuracy results in smooth meshing and low noise emission – critical for enclosed gearboxes and sensitive environments.
- Full Customization: From blank preparation to final machining, we tailor every aspect to your drawings – including mounting holes, keyways, and special tooth modifications.
- Cost-Effective Production: Our efficient 10,000+ m² facility with advanced CNC gear hobbing and grinding machines enables competitive pricing without compromising quality.
- Comprehensive Support: We offer engineering consultation, reverse engineering, and prototyping services. Lead times typically 4–8 weeks depending on complexity.
Each external ring gear is individually serial-numbered and accompanied by a detailed inspection report. Our quality management system is certified under ISO 9001:2015 and we also hold certifications including ISO 14000, SA8000, OHSAS 18001 and more, reflecting our commitment to excellence, environmental responsibility, and worker safety.
Trust & Reliability – Why Choose Henan San Kuang Machinery?
Since our establishment in 2014, Henan San Kuang Machinery Technology Co., Ltd. has grown into a leading gear manufacturer located in Luoyang, Henan, China – a region renowned for heavy machinery. Our factory spans 10,000–30,000 square meters, and we employ a skilled team of 51–100 people. With an annual export value of US$2.5–5 million, we serve clients across North America, South America, Europe, Asia, Africa, and Oceania. Our products are shipped via major ports including Shanghai, Qingdao, Tianjin, and Lianyungang.
We understand that gear failure can lead to expensive production stoppages. That is why we implement strict material traceability, in-process inspection, and final functional testing. Our decade-long track record of delivering precision ring gears for equipment such as wind turbine yaw drives, mining conveyors, and industrial gearboxes speaks for itself. We invite you to experience the reliability of a partner who treats every gear as a critical component.
Contact us today to discuss your specific requirements. Whether you need a one-off replacement or a production run, our team is ready to provide a detailed quotation and technical proposal. Let us help you achieve optimal performance with a custom 4140 steel external ring gear machined to the highest standards.
Frequently Asked Questions (FAQ)
-
What is the typical lead time for a custom external ring gear?
Lead time depends on complexity and quantity. Standard gears (simple profile, moderate size) are usually 4–6 weeks; larger or more intricate gears may require 8–10 weeks. Contact our sales team for a precise schedule. -
Can you provide ring gears with different heat treatment specifications (e.g., case hardening)?
Yes. While our standard is through-hardened (28–32 HRC), we can perform surface hardening (induction or nitriding) to meet higher wear resistance requirements. Please specify your hardness and case depth needs. -
What is the minimum order quantity (MOQ) for custom gears?
Our MOQ is typically 1 piece for prototyping or urgent replacement. For series production, we can adjust based on material economy. No order is too small for initial samples. -
How do you ensure the gear meets the DIN 6 precision grade?
After machining, each gear is inspected using a CNC gear measuring center and coordinate measuring machine (CMM). Parameters like pitch deviation, radial runout, and tooth thickness are verified against DIN 3962 standards. We provide a certified inspection report with every order. -
Do you offer assistance with gear design or tooth profile improvement?
Absolutely. Our engineering team can review your drawing, suggest modifications to improve load distribution or manufacturability, and even perform 3D modeling and finite element analysis (FEA) upon request. -
What surface treatments are available for corrosion protection?
Common options include black oxide, manganese phosphate, zinc plating, and painting. We can apply any coating that suits your environment. High-temperature or food-grade coatings are also possible. -
Can you produce ring gears with internal splines or mounting holes?
Yes. As a fully custom service, we can incorporate any secondary machining features such as keyways, dowel pin holes, threaded holes, or internal splines directly into the gear blank. -
What payment terms and shipping methods do you accept?
We accept T/T, L/C, and other negotiable terms. For shipment, we work with reliable freight forwarders to deliver via sea, air, or express (DHL/FedEx). Most orders are shipped FOB from Shanghai, Qingdao, Tianjin, or Lianyungang.
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