The SKF 638/5-2Z Bearing, measuring 5x11x5 mm, is a precise miniature deep groove ball bearing. Renowned for its compact dimensions, this bearing is expertly engineered by SKF to cater to a variety of high-performance applications. Its small size and robust construction make it suitable for use in sectors where space constraints and efficiency are paramount. As a versatile component, it is particularly utilized in compact mechanisms and precision instruments.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 5 mm |
| Outer diameter (D) | 11 mm |
| Width (B) | 5 mm |
| Weight | 4 g |
| Basic dynamic load rating (C) | 1.28 kN |
| Basic static load rating (C0) | 0.48 kN |
| Limiting speed | 75,000 rpm |
| Shielding / Sealing | ZZ (Double Shielded) |
| Ring material | Chrome steel 100Cr6 |
| Factory lubrication | Lithium grease |
Technical advantages
The SKF 638/5-2Z Bearing offers several technical advantages, making it a preferred choice in precision applications:
- Capable of continuous operation at speeds up to 75,000 rpm, thanks to its optimized ball geometry.
- Manufactured from heat-treated 100Cr6 chrome steel, ensuring rolling-contact fatigue life exceeding 107 cycles.
- Standard CN radial clearance, ideal for applications that require minimal preload.
- Double shielded (ZZ) for effective protection against dust and particulate contamination.
- Pre-lubricated with lithium grease for reduced maintenance and extended operational intervals.
Typical applications
This bearing is widely used across various industries, highlighting its versatility and adaptability:
- Measurement and laboratory instruments, including optical encoders and electronic micrometers.
- Aeromodelling and drones, specifically in brushless motors and planetary gearboxes.
- Dental equipment, such as turbines, contra-angles, and micromotors.
- Precision robotics, including harmonic drive reducers and cardan joints.
- Medical devices, featuring peristaltic pumps and lung ventilators.
Availability and ordering
Eurobearing.eu is your specialized B2B supplier for the SKF 638/5-2Z Bearing, ensuring fast availability and reliable service. This bearing can be promptly added to your cart for immediate purchase, or you may request a quotation for bulk quantities to suit your industrial needs.
