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Help CenterCustom Spur & Helical Internal Gear Ring Heat Treated Hardened Annular Gear for Gearbox Transmission
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Henan San Kuang Machinery Technology Co., Ltd. has been a trusted manufacturer of precision transmission components since 2014. Our Custom Spur & Helical Internal Gear Ring Heat Treated Hardened Annular Gear is engineered to deliver exceptional torque transmission and long service life in demanding gearbox applications. By combining advanced heat treatment processes with strict quality control, we provide gears that maintain dimensional stability under high load and high speed conditions.
Each annular gear ring is manufactured using high-grade alloy steels such as 20CrMnTi and 40Cr, ensuring excellent core toughness and surface hardness. Our proprietary carburizing and quenching process achieves a hardened case depth of 0.8–1.5 mm with a surface hardness of HRC 58-62, significantly extending the gear's wear resistance and fatigue life. Whether you need spur or helical internal tooth profiles, we offer fully customizable module, tooth count, and overall dimensions to match your gearbox design.
Our factory spans 10,000–30,000 square meters and houses state-of-the-art CNC hobbing, shaping, and grinding machinery. With annual export values of US$2.5–5 million, we serve customers across North America, Europe, Asia, and beyond. Every gear undergoes rigorous inspection using coordinate measuring machines and gear testers to guarantee AGMA or DIN quality grades.
Product Features & Technical Specifications
- Tooth Profile Options: Spur or helical internal teeth, with pressure angles of 14.5°, 20°, or 25° as required.
- Heat Treatment: Carburizing, nitriding, or induction hardening – all controllable to achieve uniform case depth.
- Material Flexibility: 20CrMnTi, 40Cr, 42CrMo, 45# steel, or other alloys upon request.
- Precision Grade: AGMA Q8–Q12 or DIN 6–8, verified by comprehensive CMM reporting.
- Surface Finish: Ground tooth flanks with Ra ≤ 0.8 μm for smooth meshing and low noise.
- Size Range: Outer diameter from 100 mm to 2000 mm; module range 1–20.
- Customization: Keyways, mounting holes, splines, or special chamfers can be integrated.
- Applications: Industrial gearboxes, wind turbine drives, mining equipment, marine transmissions, and more.
| Parameter | Standard Range | Customization |
|---|---|---|
| Outer Diameter (OD) | 100 – 2000 mm | Yes |
| Inner Diameter (ID) | 50 – 1800 mm | Yes |
| Module | 1 – 20 | Yes |
| Teeth Number | 10 – 300 | Yes |
| Hardness (Surface) | HRC 58–62 | Optional (e.g., HRC 54–60) |
| Case Depth | 0.8 – 1.5 mm | Customizable |
| Quality Standard | AGMA Q8–Q12 / DIN 6–8 | Higher grades available |
Key Advantages for Your Gearbox
- Enhanced Load Capacity: Helical teeth provide greater contact ratio and smoother engagement, reducing vibration and noise.
- Longer Service Life: Precise heat treatment eliminates premature wear and pitting, even under continuous heavy loads.
- Custom Fit: We match your gearbox housing and shaft dimensions exactly, eliminating the need for rework.
- Competitive Lead Time: Our integrated production facility allows us to complete custom orders in 15–30 working days.
- Reliable Quality Assurance: All gears come with a material certificate and inspection report.
With over a decade of export experience, Henan San Kuang Machinery Technology Co., Ltd. has successfully delivered thousands of internal gear rings to satisfied clients worldwide. Our factory holds certifications including ISO9001, ISO14000, OHSAS18001, and automotive standards such as TS16969, demonstrating our commitment to quality management and environmental responsibility. In the past year, over 80% of our orders came from repeat customers, a testament to our consistent product performance and service.
We are located in Luoyang, Henan, China – a major industrial hub for heavy machinery. Our convenient access to the ports of Shanghai, Lianyungang, Qingdao, and Tianjin ensures efficient global logistics. Whether you need a single prototype or high-volume production, we invite you to request a quote and experience our engineering expertise firsthand.
Frequently Asked Questions (FAQ)
-
Q: What materials are typically used for your internal gear rings?
A: Common materials include 20CrMnTi, 40Cr, 42CrMo, and 45# steel. We can also use other alloy steels based on your specific requirements. -
Q: What heat treatment options do you offer?
A: We offer carburizing & quenching, nitriding, and induction hardening. The standard hardness range is HRC 58-62, but we can adjust the process to achieve HRC 54-60 if needed. -
Q: Can you produce gears with internal splines or keyways?
A: Yes, we can integrate keyways, splines, mounting holes, and other features during the machining stage. Please provide your detailed drawing. -
Q: What is the typical lead time for a custom gear ring?
A: For standard sizes and moderate quantities, lead time is 15–20 working days. Complex geometries or large orders may require 25–30 working days. -
Q: Do you provide a quality certificate with each shipment?
A: Absolutely. Each gear is inspected and comes with a material test report (MTR) and dimensional inspection report. We can also provide a third-party inspection upon request. -
Q: What is your minimum order quantity (MOQ)?
A: MOQ is 1 piece for custom orders. However, for cost-effective production, we recommend ordering at least 10 pieces per design. -
Q: How do you ensure the gear ring’s concentricity and roundness?
A: We use precision machining centers and grinders, and every gear is checked with CMM gauges to ensure runout within 0.02–0.05 mm depending on size.
Contact our sales team today with your drawings or specifications. We will provide a tailored solution that meets your gearbox requirements and budget.
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