- YongnianDistrict Handan city, Hebei Province
- Nancy@mj-anchor.com
- +86 18131004569
Our Shaft Retaining Rings, commonly known as external circlips or snap rings, are precision-engineered fasteners designed to provide a secure, removable shoulder for the axial positioning of components on shafts. Conforming to standards like GB 894 (and similar to DIN 471), these rings are an economical and space-saving alternative to traditional fastening methods such as threaded nuts, cotter pins, or machining shoulders directly into a shaft. They are installed into a pre-machined groove, where their inherent spring tension holds them firmly in place, effectively preventing the lateral movement of parts like bearings, gears, and pulleys. Crafted from high-quality spring steel, they offer a reliable and efficient solution for countless applications in machinery, automotive systems, and general industrial equipment.
The functionality of a shaft retaining ring lies in its unique open-loop design and material properties. Our standard rings are manufactured from high-grade 65Mn carbon spring steel, which is heat-treated to achieve exceptional hardness and elasticity. This allows the ring to be expanded for installation without permanent deformation, ensuring it snaps back securely into the groove and exerts a continuous radial force. The two lugs, featuring holes for circlip pliers, facilitate easy and damage-free installation and removal. For standard applications, the rings are finished with a black oxide coating, which provides moderate corrosion resistance and a degree of lubricity. For applications in corrosive or sanitary environments, we also offer these circlips in high-quality 304 stainless steel.
The following tables detail the technical and dimensional specifications for our Shaft Retaining Rings.
General Specifications:
| Parameter | Description |
|---|---|
| Product Name | Retaining Rings for Shafts (External Circlips / Snap Rings) |
| Standard | GB 894 (Normal Type) |
| Material | 65Mn Carbon Steel, 304 Stainless Steel |
| Grade | A2-70, A4-70, A4-80, etc. |
| Finish | Black Oxide Coating, Plain |
| Size Range | φ3mm to φ300mm |
| Application | Heavy Industry, General Industry, Machinery, Automotive |
| Certificates | ISO9001, ISO14001, ISO45001, SGS |
Dimensional Specifications (in mm):
The table below shows a representative sample of available sizes. A full range from φ3mm to φ300mm is available. Please contact us for a complete specification sheet.
| Nominal Diameter (d) | Groove Inner Diameter (d3) | Thickness (s) | Lug Width (a) | Groove Width (n) |
|---|---|---|---|---|
| φ8 | 7.22 – 7.46 | 0.8 | 3.2 | 1.5 |
| φ12 | 10.64 – 11.1 | 1.0 | 3.3 | 1.8 |
| φ20 | 18.08 – 18.63 | 1.2 | 4.0 | 2.6 |
| φ25 | 22.78 – 23.41 | 1.2 | 4.4 | 3.0 |
| φ40 | 35.6 – 36.89 | 1.75 | 6.0 | 4.4 |
| φ50 | 44.9 – 46.19 | 2.0 | 6.9 | 5.1 |
| φ75 | 69.4 – 70.96 | 2.5 | 8.4 | 7.0 |
| φ100 | 93.2 – 95.04 | 3.0 | 9.6 | 9.0 |
Our Shaft Retaining Rings are designed for optimal performance and ease of use, providing several key advantages:
Shaft Retaining Rings are fundamental components in a vast array of mechanical and industrial assemblies. They are essential for locating and retaining bearings on shafts, securing gears, sprockets, and pulleys to prevent them from sliding, and positioning pistons and gudgeon pins in engines and compressors. In power transmission systems, they act as stops and spacers for various moving components. Their versatility also makes them ideal for use in automotive systems, agricultural machinery, precision instruments, and general industrial equipment where reliable axial fastening is required.
