The 638/5-2RS Bearing 5X11X5, listed under SKU 63852RS-ECO, is a miniature deep groove ball bearing designed for demanding industrial applications. With a bore diameter of 5 mm, an outer diameter of 11 mm, and a width of 5 mm, this component is ideal for compact setups. It is commonly used in precision equipment and small-scale machinery, where space constraints and efficient load handling are critical.
Technical specifications
| Specification | Value |
|---|---|
| Bore diameter (d) | 5 mm |
| Outer diameter (D) | 11 mm |
| Width (B) | 5 mm |
| Basic dynamic load rating (C) | 1.28 kN |
| Basic static load rating (C0) | 0.48 kN |
| Limiting speed | 40,000 rpm |
| Shielding / Sealing | 2RS |
| Ring material | Chrome steel 100Cr6 |
| Factory lubrication | Lithium grease |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
This 638/5-2RS bearing offers several distinct technical advantages that make it a preferred choice for industrial applications:
- High limiting speed of 40,000 rpm, suitable for high-speed applications.
- Manufactured from heat-treated 100Cr6 chrome steel, ensuring rolling-contact fatigue life exceeding 107 cycles.
- Standard CN radial clearance, facilitating assemblies without preload requirements.
- Equipped with 2RS sealing, providing effective IP-rated protection against dust and water splashes.
- Lubricated with lithium grease for reduced friction and enhanced performance in dynamic environments.
Typical applications
The 638/5-2RS Bearing is utilized across various industries and equipment types due to its compact size and technical specifications:
- Measurement and laboratory instruments such as optical encoders and electronic micrometers.
- Aeromodelling and drones, including brushless motors and planetary gearboxes.
- Dental equipment like turbines, contra-angles, and micromotors.
- Precision robotics, including harmonic drive reducers and cardan joints.
- Medical devices, particularly in peristaltic pumps and lung ventilators.
Availability and ordering
Available at Eurobearing.eu, a specialized B2B supplier of mechanical industrial components, the 63852RS-ECO is ready for fast shipping. For larger orders, request a quotation to benefit from bulk pricing. Click “Add to Cart” or “Request Quotation” to proceed with your purchase.

