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Help CenterCustom Ring Gear Internal External Ring Gear With Carburizing Hardening Surface HRC58-62 AGMA Q10
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Henan San Kuang Machinery Technology Co., Ltd. (established 2014) is a professional manufacturer specializing in high-precision power transmission components. With a factory spanning over 10,000–30,000 square meters and an annual export value of US$2.5–5 million, we deliver reliable custom gear solutions to clients across North America, Europe, Asia, and beyond. Our Custom Ring Gear – Internal External Ring Gear with Carburizing Hardening Surface HRC58-62 AGMA Q10 represents the pinnacle of durability and precision, designed to meet the most demanding industrial applications.
This ring gear combines internal and external tooth configurations in a single component, enabling compact power transmission and reversing capabilities. Manufactured from premium alloy steel and subjected to a controlled carburizing and hardening process, the surface achieves a consistent hardness of HRC 58-62, ensuring exceptional wear resistance and fatigue life. The gear is graded to AGMA Q10 precision, guaranteeing smooth operation and minimal noise under heavy loads.
Key Features & Specifications
- Dual Tooth Configuration: Both internal and external gear teeth on a single ring – ideal for planetary gear sets, differentials, and compact drive systems.
- Precision Ground Teeth: AGMA Q10 quality ensures tooth-to-tooth spacing and profile accuracy, reducing vibration and extending bearing life.
- Uniform Case Depth: Carburizing depth of 0.8–1.5 mm (customizable) with a gradual hardness gradient from case to core.
- Surface Hardness HRC 58-62: Provides excellent resistance to pitting, scuffing, and abrasive wear – even under high loads and lubricated conditions.
- Customizable Dimensions: Outer diameter from 100 mm to 2000 mm, modules from 1 to 20, and teeth counts up to 500 – tailored to your design.
- Heat Treatment Control: We use advanced atmosphere-controlled furnaces to prevent decarburization and distortion.
- Material Options: Standard 20CrMnTi, 20CrNi2Mo, or 42CrMo4; special alloys available upon request.
- Rigorous Inspection: 100% dimensional check, hardness test, and gear rolling inspection before shipment.
Technical Parameters (Typical Values)
| Parameter | Value / Range |
| Material | 20CrNi2Mo (Carburizing grade) |
| Surface Hardness | HRC 58-62 |
| Core Hardness | HRC 30-40 |
| Effective Case Depth | 0.8–1.5 mm (adjustable) |
| Precision Grade | AGMA Q10 (DIN 6-7 equivalent) |
| Maximum Outer Diameter | 2000 mm |
| Tooth Profile | Involute (standard or modified) |
| Heat Treatment | Carburize & Quench + Tempering |
Detailed Advantages & Customer Benefits
- Extended Service Life: The hardened case (HRC58-62) combined with a tough core resists contact fatigue and tooth breakage – typical lifespan increases by 30–50% compared to through-hardened gears.
- Compact Design Possibility: Integrating internal and external teeth reduces the number of components, saving space and weight in transmissions and reducers.
- Low Noise & Vibration: AGMA Q10 precision ensures uniform tooth contact, minimizing noise (below 75 dB typical in gearboxes) and reducing dynamic loads on bearings.
- Custom Fit: We offer full customization: bore size, hub design, keyways, splines, and mounting holes – match your exact interface.
- Process Control: Our ISO9001, ISO14000, and OHSAS18001 certified production process ensures traceability and quality consistency.
- Cost Efficiency: One ring gear replaces both an external gear and an internal gear, reducing procurement and assembly time.
- Reliable Supply: With 51–100 experienced workers and 10,000+ m² facility, we handle both prototypes and mass production (MOQ negotiable).
Tailored for Your Application: Whether you need ring gears for planetary winches, truck differentials, wind turbine pitch drives, or industrial gearboxes, our engineering team works closely with you to optimize tooth geometry, material selection, and heat treatment parameters. We provide free design review and technical support during the quotation phase.
Trust & Reliability from a Proven Partner
Since 2014, Henan San Kuang Machinery Technology Co., Ltd. has served clients in over 20 countries, including North America, Europe, Southeast Asia, and Oceania. Our annual export value exceeding US$2.5 million reflects global trust. We ship through major ports (Shanghai, Qingdao, Tianjin, Lianyungang) with professional packaging suitable for ocean or air freight.
Every ring gear is backed by a quality guarantee: 100% inspection of hardness, dimensions, and gear runout. We also provide material certificates and heat treatment reports upon request. Our experienced R&D team can assist with failure analysis and design improvements for your existing applications.
Contact us today to request a quote or discuss your custom ring gear needs. We respond within 24 hours and offer competitive pricing for small to large quantities.
Frequently Asked Questions (FAQ)
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Q: What is the minimum order quantity (MOQ) for custom ring gears?
A: For standard materials and sizes, MOQ can be as low as 5 pieces. For highly customized designs (special alloys or complex geometries), MOQ is typically 20–50 pieces. Contact us for specific needs. -
Q: Can you provide ring gears with both internal and external teeth in one piece?
A: Yes, that is exactly the product we offer. We manufacture combined internal/external ring gears with precision machining to ensure concentricity between the two tooth sets. -
Q: How is the AGMA Q10 grade verified?
A: We use a gear measuring center (GMC) to inspect tooth profile, lead, and pitch deviations. The results comply with AGMA Q10 tolerances. A certificate can be supplied. -
Q: What surface hardness ranges are available besides HRC 58-62?
A: We can adjust carburizing parameters to achieve HRC 55-65 or even higher, depending on material and case depth requirements. Discuss your specific hardness target. -
Q: Can you supply ring gears made from stainless steel for corrosion resistance?
A: Yes, we offer 17-4PH, 304, or 316 stainless steel, though the carburizing hardness may be lower (typically HRC 45-52). We can recommend alternative surface treatments such as nitriding for stainless grades. -
Q: What is the typical lead time for a custom internal/external ring gear?
A: For a medium-sized order (50 pieces), lead time is approximately 30–45 working days after design approval. Rush orders can be expedited with a surcharge. -
Q: Do you provide samples before mass production?
A: Yes, samples are available. Tooling and sample cost are refundable with bulk orders. We also accept pre-production samples for your testing. -
Q: How do you ensure the ring gear does not distort during carburizing?
A: We use specialized fixturing and controlled cooling cycles. Additionally, we machine the bore and mounting surfaces after heat treatment to guarantee dimensional accuracy within 0.02–0.05 mm.
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