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Help CenterHardened and Tempered Gear Shaft, 40Cr Material, <0.8μm Surface Roughness, Heavy Duty
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Welcome to Henan San Kuang Machinery Technology Co., Ltd., a trusted manufacturer of high-quality mechanical transmission components since 2014. Our Hardened and Tempered Gear Shaft, crafted from premium 40Cr material, is designed to deliver exceptional durability and precision under extreme loads. With a surface roughness of less than 0.8 μm, this heavy-duty gear shaft ensures smooth operation and reduced friction, making it ideal for demanding industrial applications where reliability is non-negotiable.
Our gear shafts are produced in a state-of-the-art factory spanning 10,000–30,000 square meters, with a dedicated team of 51–100 experienced professionals. We have exported to markets across North America, South America, Europe, Southeast Asia, Africa, and more, with annual export values between US$2.5 million and US$5 million. This product reflects our commitment to engineering excellence and customer satisfaction.
Key Features & Technical Specifications
- Material: 40Cr alloy steel, known for its high strength, toughness, and wear resistance after heat treatment.
- Heat Treatment: Hardened and tempered to achieve a uniform microstructure, enhancing fatigue life and load-bearing capacity.
- Surface Roughness: Ra ≤ 0.8 μm, achieved through precision grinding and finishing processes, ensuring low noise and vibration.
- Hardness: Typically 48–55 HRC, customizable based on customer requirements to balance hardness and toughness.
- Heavy-Duty Design: Optimized for high torque transmission and shock resistance, suitable for mining, construction, and industrial gearboxes.
- Customization: Available in various lengths (100–2000 mm), diameters (20–300 mm), tooth profiles (spur, helical, spline), and keyway sizes.
- Quality Control: 100% dimensional inspection, magnetic particle testing (MPT), and ultrasonic testing (UT) upon request.
| Parameter | Value |
| Material Grade | 40Cr (GB/T 3077) |
| Surface Roughness (Ra) | ≤ 0.8 μm |
| Hardness Range | 48–55 HRC (customizable) |
| Heat Treatment Process | Quenching + Tempering |
| Applicable Standards | ISO 9001, ISO 14000, OHSAS 18001, etc. |
| Max Length | 2000 mm |
| Max Diameter | 300 mm |
Advantages for Your Applications
Our hardened and tempered gear shafts provide superior performance in heavy-duty environments. The 40Cr material offers excellent core toughness, reducing the risk of brittle fracture under sudden loads. The fine surface finish (Ra
We understand that each application has unique requirements. That’s why we offer flexible customization—from tooth geometry to keyway dimensions—ensuring a perfect fit for your gearbox. Our in-house engineering team can also provide design recommendations to optimize load distribution and reduce noise.
Quality Assurance & Trust
Henan San Kuang Machinery Technology Co., Ltd. is committed to quality management systems certified under ISO 9001, ISO 14000, OHSAS 18001, and other international standards. Our factory is equipped with advanced CNC machining centers, heat treatment furnaces, and precision measuring instruments. Every gear shaft undergoes rigorous inspection, including chemical composition analysis, hardness testing, and surface roughness measurement.
Over the past 10 years, we have built long-term partnerships with clients in over 20 countries and regions. Our annual export value of US$2.5–5 million reflects our global reach and reliability. We ship through major ports including Shanghai, Lianyungang, Qingdao, and Tianjin, ensuring timely delivery to your doorstep.
We invite you to experience the difference of a true heavy-duty gear shaft. Contact our sales team today for a quote or technical consultation. Let us help you power your machinery with confidence.
Frequently Asked Questions
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Q: What is the typical lead time for custom gear shafts?
A: Lead time depends on complexity and quantity. Standard sizes are usually 15–20 working days; custom orders may take 25–35 working days. We offer expedited options for urgent needs. -
Q: Can you provide samples for testing before bulk order?
A: Yes, we provide samples upon request. Sample cost is negotiable, and it will be deducted from the final order. Shipping charges are borne by the buyer. -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is typically 10 pieces for standard sizes. For custom designs, MOQ may be higher depending on manufacturing complexity. We are flexible for small trial orders. -
Q: How do you ensure the surface roughness of less than 0.8 μm?
A: We use precision grinding and superfinishing processes. Each shaft is measured with a profilometer, and reports are provided with the shipment. -
Q: Is the 40Cr material suitable for corrosive environments?
A: 40Cr has moderate corrosion resistance. For corrosive environments, we recommend optional surface treatments such as phosphating, zinc plating, or Dacromet coating. Please consult our engineers. -
Q: Do you offer heat treatment certification?
A: Yes, we provide material certificates and heat treatment process records. Third-party inspection (e.g., SGS, BV) is also available at the buyer’s cost. -
Q: What is the warranty period for your gear shafts?
A: We offer a standard 12-month warranty against manufacturing defects. Extended warranty can be discussed for large contracts. -
Q: Can you manufacture gear shafts with non-standard tooth profiles (e.g., spline, double helical)?
A: Absolutely. Our design team can create custom tooth profiles based on your drawings or specifications. We have experience with complex profiles for various industries.
Choose Henan San Kuang Machinery Technology Co., Ltd. for your next heavy-duty gear shaft project. Our combination of precision engineering, robust quality control, and global logistics ensures you receive a product that exceeds expectations. Request a quote now and let’s drive your success together.
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