The 639/3-2Z Bearing 3X8X4, available under SKU 63932Z-ECO, is a miniature deep groove ball bearing designed for precision applications. With dimensions of 3 mm bore diameter, 8 mm outer diameter, and 4 mm width, it is perfectly suited for compact mechanical assemblies. This bearing is typically used in industries where space efficiency and precision are crucial, such as in the development of precision robotics and medical devices.
Technical specifications
| Specification | Value |
| Bore diameter (d) | 3 mm |
| Outer diameter (D) | 8 mm |
| Width (B) | 4 mm |
| Basic dynamic load rating (C) | 0.58 kN |
| Basic static load rating (C0) | 0.22 kN |
| Limiting speed (rpm) | 85,000 rpm |
| Shielding | ZZ |
| Ring material | Chrome steel 100Cr6 |
| Factory lubrication | Lithium grease |
| Precision class | P0 / ABEC-1 |
| Internal clearance | CN |
Technical advantages
This 639/3-2Z Bearing offers several technical advantages that make it an ideal choice for high-precision applications:
- Capable of continuous operation up to 85,000 rpm, suitable for high-speed environments.
- Constructed from heat-treated 100Cr6 chrome steel, providing a rolling-contact fatigue life exceeding 107 cycles.
- Features standard CN radial clearance, which is optimal for assemblies that do not require preload.
- Equipped with ZZ shielding, offering an effective barrier against dust and other contaminants.
- Lubricated with lithium grease, ensuring smooth operation and reduced maintenance intervals.
Typical applications
The 639/3-2Z Bearing is versatile and finds applications across a range of specialized industries:
- Measurement and laboratory instruments, such as optical encoders and electronic micrometers.
- Aeromodelling and drones, including brushless motors and planetary gearboxes.
- Dental equipment, like turbines and contra-angles.
- Precision robotics, including harmonic drive reducers and cardan joints.
- Medical devices, such as peristaltic pumps and lung ventilators.
Availability and ordering
Eurobearing.eu is your go-to B2B supplier for the 63932Z-ECO bearing, ensuring fast availability and delivery. For larger projects, you can request a quotation for bulk quantities. Add this essential component to your cart or request a quotation today to meet your specific industrial needs.
