719/8 CE/PA9ADGA
Miniature Super Precision Angular Contact Ball Bearings
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719/8 CE/PA9ADGA Bearing Product Overview & Core Advantages
The 719/8 CE/PA9ADGA is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Engineered to accommodate combined loads—simultaneously handling radial and axial forces—this bearing features an extra light preload (Class A) for minimal friction and optimal running accuracy. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs, providing superior rigidity and operational stability in high-precision machinery.
719/8 CE/PA9ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 719/8 | Super-precision angular contact bearing series with 8 mm bore diameter |
| CE | Contact angle of 15°, optimized for high-speed applications |
| PA9A | High-precision tolerance class (PA9A) ensuring tight dimensional control |
| DGA | Phenolic resin cage material and universal matchable (SU) designation |
719/8 CE/PA9ADGA Bearing Structural Features & Performance Benefits
High-Speed Capability: The 15° contact angle and lightweight phenolic cage minimize centrifugal forces, enabling stable operation at limiting speeds up to 220,000 rpm. The open design and optimized lubrication further enhance thermal management at high velocities.
Rigidity & Load Capacity: Manufactured with chrome steel rings and balls, this bearing offers high dynamic load capacity (632 lbf radial dynamic) and can sustain combined radial and axial loads. The universal matchable pairing allows for preload adjustment, increasing system rigidity.
Precision & Longevity: The PA9A tolerance class guarantees tight dimensional control (bore and OD tolerance: -0.004mm to 0), ensuring smooth, precise rotation. Pre-lubrication and the open seal type facilitate efficient lubrication replenishment in demanding environments.
719/8 CE/PA9ADGA Bearing Typical Application Areas
The 719/8 CE/PA9ADGA is ideally suited for high-precision, high-speed applications including:
- Machine tool spindles
- High-frequency machining centers
- Precision grinding heads
- Dental and medical handpieces
- Advanced robotics and automation systems
