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Help CenterHeavy Load Internal Ring Gear, OEM Forged Gear Ring With Mill Test Report
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As a professional manufacturer from Henan San Kuang Machinery Technology Co., Ltd. (established 2022, based in Luoyang, China), we specialize in producing Heavy Load Internal Ring Gears designed for the most demanding power transmission applications. Our forged gear rings are manufactured using advanced forging technology and are supplied with a Mill Test Report to guarantee material traceability and mechanical integrity. With a factory spanning 10,000–30,000 square meters and a dedicated team of 51–100 employees, we ensure each internal ring gear meets the highest quality standards for OEM and aftermarket projects across global markets.
Our internal ring gears are engineered to handle extreme radial and axial loads, making them ideal for heavy machinery such as mining equipment, wind turbines, excavators, cement mills, and marine propulsion systems. The OEM forging process provides superior grain flow and fatigue resistance compared to cast alternatives, resulting in longer service life and reduced downtime for your equipment. Every gear ring undergoes strict inspection, and the Mill Test Report is included as standard documentation.
Product Features & Technical Specifications
- High Load Capacity: Forged alloy steel construction (e.g., 42CrMo, 20CrMnTi) ensures excellent strength and toughness under high torque and shock loads.
- Precision Gear Teeth: Teeth are cut using hobbling or gear shaping with finishing options like grinding, achieving DIN/AGMA class 6–8 accuracy.
- Custom Dimensions: Outer diameter from 200 mm to 2000 mm, module 2–20, and tooth count designed per your drawings or specifications.
- Heat Treatment Options: Surface hardening (carburizing, induction hardening) or through-hardening to achieve core toughness and surface hardness up to HRC 60.
- Mill Test Report: Each gear ring is delivered with a certified MTR showing chemical composition and mechanical properties of the raw material lot.
- Additional Testing: Ultrasonic testing, magnetic particle inspection, and dimensional validation available upon request.
- Surface Finish: Shot blasting, black oxide, phosphating, or anti-corrosion coating as per your requirement.
- OEM Flexibility: We accept custom designs, including non-standard tooth profiles, helical internal gears, and special materials like stainless steel or duplex alloys.
| Parameter | Available Range / Details |
|---|---|
| Material Grade | 42CrMo, 20CrMnTi, 40Cr, 50Mn, or customized |
| Outer Diameter (mm) | 200 – 2000 |
| Module (m) | 2 – 20 |
| Tooth Count | 20 – 300 (custom) |
| Hardness (Surface) | HRC 50–62 (after heat treatment) |
| Tooth Accuracy Grade | DIN 6–8 / AGMA Q6–Q8 |
| Max Weight per Piece | Up to 5,000 kg (dependent on dimensions) |
| Standard Documentation | Mill Test Report (included), Inspection Certificate (optional) |
Key Benefits for Your Business: By choosing our OEM forged internal ring gears, you gain a reliable partner that delivers consistent quality. The forged structure minimizes internal defects and porosity, leading to lower maintenance costs and extended equipment life. Our flexible production allows for small to large series, with lead times tailored to your project schedule. The included Mill Test Report gives you full confidence in the material integrity, essential for critical applications like mining, construction, and energy sectors.
We utilize state-of-the-art machining centers, gear hobbing machines, and heat treatment furnaces in our 10,000+ sqm factory. With annual export value between US$2.5 Million and US$5 Million, we serve clients from North America, South America, Europe, Southeast Asia, Africa, and more. Our location in Luoyang, Henan (a historic industrial base) gives us access to premium steel suppliers and experienced gear engineers.
Trusted by Global OEMs: Since 2022, we have successfully delivered thousands of forged gear rings to heavy machinery manufacturers. Our Mill Test Report protocol is aligned with international standards, and we are happy to provide third-party inspection (e.g., SGS, BV) at your request. Each product undergoes final dimensional measurement, hardness test, and surface inspection before packaging.
We are confident that our Heavy Load Internal Ring Gear will exceed your expectations in performance and durability. Contact us today to discuss your specific requirements – we can provide a quotation within 24 hours and sample delivery within 3 weeks. Let us be your preferred gear supplier for critical power transmission applications.
Frequently Asked Questions (FAQ)
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Q: Do you provide a Mill Test Report for each order?
A: Yes, a Mill Test Report (MTR) is included as standard for every batch of material used. The MTR details chemical composition, tensile strength, yield strength, and elongation values. -
Q: Can you customize the internal ring gear dimensions?
A: Absolutely. We are an OEM manufacturer and can produce internal ring gears according to your drawing or sample. Please provide the required outer diameter, inner diameter, tooth profile, module, and tooth count. -
Q: What is the typical lead time for a custom forged gear ring?
A: Lead time depends on complexity and quantity. For standard sizes, it is around 4–6 weeks. Custom orders with special materials or heat treatment may take 8–12 weeks. Contact us for an accurate schedule. -
Q: What heat treatment options do you offer?
A: We offer carburizing, nitriding, induction hardening, annealing, and quenching & tempering. The choice depends on the material and required surface hardness. -
Q: How do you ensure the quality of the gear teeth?
A: We use precision gear-cutting machines (hobbing, shaping) followed by gear grinding when high accuracy is needed. All teeth are inspected with gear testers and coordinate measuring machines (CMM). -
Q: What is the maximum outer diameter you can produce?
A: Our current maximum outer diameter is approximately 2000 mm for internal ring gears. For larger sizes, please contact us to discuss feasibility. -
Q: Do you ship internationally? Which ports do you use?
A: Yes, we export worldwide. Our main shipping ports are Shanghai, Lianyungang, Qingdao, and Tianjin. We coordinate with freight forwarders for both sea and air freight. -
Q: Can I request third-party inspection before shipment?
A: Certainly. We welcome inspections by SGS, BV, TÜV, or any agency you appoint. The cost is negotiable and can be arranged in advance.
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