The SKF 638/8-2Z bearing is a precision-engineered miniature deep groove ball bearing, specifically designed for compact applications where space is a premium. With main dimensions of 8 mm bore diameter, 16 mm outer diameter, and a 6 mm width, this bearing is ideal for high-speed and low-noise operations. As part of SKF’s renowned product lineup, it is frequently utilized in sectors requiring reliable micro-componentry, such as precision instruments and small electric motors.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 8 mm |
| Outer diameter (D) | 16 mm |
| Width (B) | 6 mm |
| Basic dynamic load rating (C) | 1.28 kN |
| Basic static load rating (C0) | 0.53 kN |
| Limiting speed | 40,000 rpm |
| Shielding / Sealing | ZZ (double metal shields) |
| Ring material | Chrome steel 100Cr6 |
| Factory lubrication | Grease |
| Precision class | P0 / ABEC-1 |
Technical advantages
The SKF 638/8-2Z bearing provides a range of technical benefits, making it a superior choice for precision applications:
- High-speed capability with a limiting speed of up to 40,000 rpm, suitable for dynamic applications.
- Robust construction with chrome steel 100Cr6, ensuring rolling-contact fatigue life exceeds 107 cycles.
- Double metal shields (ZZ) provide effective protection against dust ingress, maintaining optimal performance.
- Standard precision class P0 / ABEC-1, ensuring dimensional accuracy for general industrial use.
- Grease-lubricated for reduced friction and enhanced performance over a wide range of operating conditions.
Typical applications
The SKF 638/8-2Z bearing is widely used across various high-precision industries, including:
- Measurement and laboratory instruments, such as optical encoders and electronic micrometers.
- Aeromodelling and drones, particularly in brushless motors and planetary gearboxes.
- Dental equipment, including turbines and contra-angles.
- Precision robotics, utilized in harmonic drive reducers and cardan joints.
- Medical devices, such as peristaltic pumps and lung ventilators.
Availability and ordering
Eurobearing.eu offers the SKF 638/8-2Z bearing with fast availability and competitive pricing. As a specialized B2B supplier, we provide the option to request a quote for bulk quantities. To purchase, simply add the item to your cart or contact us for further assistance.
