SRD series high precision bearings are designed for high-speed operation and high stiffness requirements. Available with 15 deg and 25 deg contact angle options, and three preload classes: L (light), M (medium), N (heavy). Suitable for machine tool spindles, medical equipment, aerospace, and other high-precision applications.
Product Appearance (SRD Series) 
| Designation | d | D | B | C (Dyn) | Co (Stat) | r min | r max | Angle | Preload L/M/N | RPM (Oil) | RPM (Grease) | TK |
|---|
Product Features
Contact Angle Options
- 15 deg: Higher radial load capacity, moderate axial stiffness
- 25 deg: Higher axial stiffness, excellent for combined loads
Preload Classes
- L (Light): Lower friction, highest speed capability
- M (Medium): Balanced performance for general applications
- N (Heavy): Maximum stiffness for high load conditions
Precision Grades
- Standard: P4 class tolerance
- Available: P2, UP (ultra-precision) on request
Applications
- Machine tool spindles (CNC, grinding)
- High-speed dental and surgical handpieces
- Precision measuring instruments
- Aerospace and defense systems
Lubrication Recommendations
Oil Lubrication:
Recommended for maximum speed applications. Oil-air or oil-mist systems provide optimal heat dissipation.
Grease Lubrication:
Suitable for moderate speed applications. Factory-filled with high-quality spindle grease available.