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Help CenterWorm Shaft With Bearing Journals Ground Finish Ra0.8 for Worm Gear Reducer Assembly
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Henan San Kuang Machinery Technology Co., Ltd. (est. 2014) is a specialized manufacturer of precision transmission components, serving clients across North America, Europe, Asia, and Oceania. Our Worm Shaft with Bearing Journals Ground Finish Ra0.8 is engineered for high-performance worm gear reducer assemblies where reliability, quiet operation, and extended service life are critical. With a 10,000–30,000 m² factory and skilled team of 51–100 people, we deliver shafts that meet strict dimensional tolerances and surface finish requirements.
This worm shaft features bearing journals precision-ground to Ra0.8 (0.8 µm), ensuring optimal fit and reduced friction in the reducer housing. The shaft is manufactured from high-strength alloy steel, with optional heat treatment (carburizing or induction hardening) to achieve core toughness and surface wear resistance. Every shaft undergoes 100% dimensional inspection and surface roughness verification before shipment.
Key Features & Benefits
- Ra0.8 Ground Finish: Minimizes bearing wear and vibration, enabling smoother operation and longer reducer life.
- Precision Bearing Journals: Machined to tight tolerances (IT6–IT7) for consistent assembly with standard bearings.
- Customizable Geometry: Shaft length, journal diameters, keyways, and thread ends can be tailored to your reducer design.
- Material Options: 20CrMnTi, 40Cr, 42CrMo, or equivalent alloy steels – with certificate of material traceability.
- Heat Treatment Available: Carburizing, nitriding, or induction hardening upon request to meet specific hardness profiles (e.g., surface 58–62 HRC, core 30–40 HRC).
- Comprehensive Quality Control: ISO9001:2015 certified facility; each shaft is checked for dimensions, runout, surface roughness, and magnetic particle inspection (optional).
| Specification | Typical Value / Range |
|---|---|
| Shaft Diameter (bearing seats) | 20 – 100 mm (custom) |
| Shaft Length (overall) | 100 – 2000 mm |
| Surface Roughness (Ra) | 0.8 µm (grinding); optional 0.4 µm |
| Tolerance (bearing journals) | ISO IT6 / IT7 |
| Concentricity | ≤ 0.02 mm |
| Hardness (after heat treatment) | 50–62 HRC (surface); customizable core |
| Keyway | Per DIN 6885 or custom |
Our worm shafts are used in industrial gearboxes, conveyor drives, elevators, and packaging machinery. The Ra0.8 ground finish directly reduces friction losses and heat generation, which translates to energy savings and reduced maintenance intervals for your end customers. With our annual export value exceeding US$2.5 million, we have proven capability to serve global OEMs and distributors.
Why choose Henan San Kuang? Since 2014, we have supplied precision shafts to over 30 countries. Our factory holds multiple quality management certifications including ISO9001:2015, OHSAS18001, and we follow strict environmental standards (ISO14000). We ship via major Chinese ports (Shanghai, Qingdao, Tianjin, Lianyungang) with professional packing to prevent damage during transit. Every order is backed by our dedicated engineering support and fast response time.
Ready to improve your reducer assembly performance? Contact us for a quotation or technical drawing review – we are happy to provide sample testing and custom solutions.
Frequently Asked Questions
Q1: What is the lead time for a custom worm shaft with Ra0.8 finish?
A: Typical lead time is 3–4 weeks for standard sizes; custom designs may require 4–6 weeks depending on complexity and quantity. We can expedite small orders.
Q2: Do you provide material certificates?
A: Yes, we supply mill test certificates for all alloy steel used. Additional third-party inspection can be arranged upon request.
Q3: Can the bearing journals be made with different surface roughness?
A: Yes, Ra0.8 is our standard grinding finish, but we can achieve Ra0.4 or Ra0.2 by superfinishing for special applications.
Q4: How do you ensure the shaft is straight and concentric?
A: We use centerless grinding for outer diameters and check runout on precision V-blocks. Our quality system requires 100% inspection of concentricity (≤0.02mm).
Q5: What is the minimum order quantity (MOQ)?
A: MOQ is 10 pieces for standard sizes. For custom shafts, MOQ can be as low as 1–5 pieces for prototype evaluation.
Q6: Do you offer heat treatment services?
A: Yes, we offer carburizing, nitriding, and induction hardening. We can meet hardness specifications such as S58-62 HRC surface with core 30-40 HRC.
Q7: What packing method do you use for export?
A: Each shaft is individually wrapped with anti-rust paper, then packed in wooden crates with foam supports. Outer packing is suitable for sea freight.
Q8: Do you provide technical support for designing the shaft?
A: Absolutely. Our engineering team can review your reducer assembly drawings and recommend optimal shaft dimensions, tolerances, and heat treatment for your load conditions.
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