71919 CDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71919 CDGA/P4A Bearing Product Overview & Core Advantages
The 71919 CDGA/P4A is a single-row angular contact ball bearing engineered for applications demanding ultra-high precision and superior running accuracy. Positioned in the P4A tolerance class, this bearing is designed to handle primarily axial loads in one direction, as well as combined loads, making it ideal for high-speed spindles and precision machinery. Its extra light preload (Class A) ensures minimal deflection and smooth operation, while the phenolic cage contributes to excellent high-speed performance. This bearing is universally matchable (SU), allowing for precise axial rigidity control when mounted in pairs.
71919 CDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71919 | Basic bearing series and size designation (95mm bore, 130mm OD, 18mm width). |
| C | 15° contact angle, optimized for high-speed applications with combined loads. |
| DG | Universal Matchable bearing. Can be paired in a back-to-back (DB) or face-to-face (DF) arrangement to support combined or moment loads. |
| A | Extra light preload (Class A), which minimizes friction and heat generation for superior high-speed operation. |
| P4A | Super precision tolerance class, providing extremely tight dimensional and running accuracy for the most demanding applications. |
71919 CDGA/P4A Bearing Structural Features & Performance Benefits
- High-Speed Capability: The phenolic resin cage offers low weight and excellent sliding properties, enabling a high limiting speed of 16,000 rpm. The 15° contact angle further reduces heat generation at high rotational speeds.
- Precision & Rigidity: Manufactured to P4A tolerance class with a bore and OD tolerance of -0.004mm to 0, this bearing ensures exceptional running accuracy and system stability. The extra light preload enhances rigidity without compromising speed.
- Superior Load Capacity: With a dynamic load rating of 11,115 lbf and a static load rating of 12,375 lbf, it reliably handles significant axial and combined loads.
- Optimized Material & Lubrication: Constructed from chrome steel for both rings and balls, ensuring high durability and fatigue resistance. The bearing is pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
71919 CDGA/P4A Bearing Typical Application Areas
The 71919 CDGA/P4A is specified for high-performance applications where precision and speed are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotic Drives: Joints and rotary actuators requiring high accuracy.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and navigation instruments.
- High-Frequency Motors and Spindles: PCB drilling spindles and dental handpieces.
