The SKF 638/4-2Z Bearing 4X9X4 mm is a miniature deep groove ball bearing designed for high-precision applications where space is limited. Manufactured by SKF, a leader in the bearing industry, this component features a compact design with a bore diameter of 4 mm, an outer diameter of 9 mm, and a width of 4 mm. Its small size makes it suitable for use in a variety of industrial applications, particularly in areas where reduced friction and efficient load handling are critical.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 4 mm |
| Outer diameter (D) | 9 mm |
| Width (B) | 4 mm |
| Basic dynamic load rating (C) | 0.65 kN |
| Basic static load rating (C0) | 0.24 kN |
| Limiting speed | 70,000 rpm |
| Shielding | ZZ (double shielded) |
| Ring material | Chrome steel 100Cr6 |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
The SKF 638/4-2Z Bearing 4X9X4 mm offers several technical advantages, making it a preferred choice for demanding applications:
- Compact design allows for integration into space-constrained assemblies.
- Continuous operation up to 70,000 rpm due to precise ball geometry.
- Rings made from heat-treated 100Cr6 chrome steel, ensuring rolling-contact fatigue life exceeding 10^7 cycles.
- Standard CN radial clearance, optimal for installations without preload.
- Double ZZ shielding provides effective protection against dust and minor water splashes.
Typical applications
The SKF 638/4-2Z Bearing is utilized in various specialized sectors, 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, for use in harmonic drive reducers and cardan joints.
- Medical devices like peristaltic pumps and microscopes.
Availability and ordering
Eurobearing.eu is your specialized B2B supplier for the SKF 638/4-2Z Bearing. We ensure fast availability and the option to request a quote for bulk quantities. Add this bearing to your cart today or contact us for a customized quotation.
