Alternator & Starter Bearings
High-speed, low-noise bearings for automotive alternators and starter motors.
60+ SKUsCatalog Pages: 50–57
About Alternator & Starter Bearings
OTT alternator and starter motor bearings are precision deep groove ball bearings designed for high-speed rotation in automotive electrical systems. Featuring low-noise, low-vibration performance with various seal configurations. Passed 1,004-hour endurance testing by a Russian OEM. Capable of successful cold starts in environments as low as -60°C.
Key Features
- Ultra-low noise and vibration
- High-speed rated for alternator applications
- Passed 1,004-hour endurance test
- Multiple seal types and grease options
- Cold-start capable down to -60°C
- Cross-reference to OEM numbers
Applications
Automotive alternatorsStarter motorsElectric generatorsSmall motors
Representative Models
6303 Alternator Bearing
High-speed deep groove ball bearing optimized for automotive alternator applications with ultra-low noise.
| Model | 6303 |
| Inner Diameter | 17 mm |
| Outer Diameter | 47 mm |
| Width | 14 mm |
| Speed Rating | High speed |
| Noise Level | Ultra-low (Z3V3) |
Frequently Asked Questions
What makes OTT alternator bearings different from standard bearings?
OTT alternator bearings are manufactured with tighter tolerances for ultra-low noise and vibration. They undergo 100% vibration testing and are available with specialized greases for high-speed, high-temperature alternator environments. Our bearings passed a rigorous 1,004-hour endurance test conducted by a Russian OEM partner.