719/8 CEGA/P4A
Miniature Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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719/8 CEGA/P4A Bearing Product Overview & Core Advantages
The 719/8 CEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of rotational accuracy and speed. Positioned for high-speed performance and exceptional running quietness, this bearing features an Extra Light (A) preload and a P4A tolerance class, ensuring minimal vibration and precise shaft guidance. Its compact design, with a 8 mm bore and 19 mm outside diameter, makes it ideal for space-constrained, high-precision spindles and instruments where reliability is critical.
Model Code Breakdown
- 719/8: Series designation and 8 mm bore diameter.
- CE: 15° contact angle and optimized internal design for high-speed operation.
- GA: Indicates the bearing is supplied as a Universal Matchable (SU) set. "G" specifies the preload group, and "A" denotes Extra Light preload.
- P4A: The tolerance class, signifying very high precision levels for both dimensional and running accuracy.
719/8 CEGA/P4A Bearing Structural Features & Performance Benefits
The performance of the 719/8 CEGA/P4A is driven by its meticulous construction. The phenolic resin cage is engineered for high-speed capability, offering low friction and excellent acceleration characteristics, contributing to the bearing's limiting speed of 220,000 rpm. The 15° contact angle provides an optimal balance between radial load capacity and moderate axial load handling in one direction. Manufactured to P4A super-precision tolerances, this bearing ensures minimal runout and superior rotational accuracy, which is essential for applications requiring extreme positional stability. The bearings are universally matchable, allowing for flexible mounting arrangements (back-to-back, face-to-face, or tandem) to achieve the required system rigidity and preload.
719/8 CEGA/P4A Bearing Typical Application Areas
This bearing is predominantly used in high-performance machinery where speed and precision are paramount. Key applications include:
- High-frequency machining spindles
- Precision grinding machine spindles
- High-speed router and milling spindles
- Dental and medical handpieces
- Advanced laboratory and testing equipment
