71920 ACE/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71920 ACE/P4ADGA Bearing Product Overview & Core Advantages
The 71920 ACE/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a universal matchable (SU) bearing supplied in a pre-lubricated set of two, it enables simplified mounting in back-to-back (DB) or face-to-face (DF) arrangements to accommodate combined loads. Its P4A tolerance class and extra light preload (Class A) ensure smooth, quiet operation with minimal heat generation, making it ideal for high-speed spindles and other precision machinery.
71920 ACE/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71920 | Basic bearing series and size designation |
| ACE | 25° contact angle, universal matchable design |
| P4A | High precision tolerance class (superior to ABEC 7) |
| DGA | Preloaded universal matched pair, extra light preload |
71920 ACE/P4ADGA Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with extremely tight dimensional control on bore, outside diameter, and width, ensuring consistent performance in precision applications.
Optimized Contact Angle: The 25° contact angle provides an excellent balance between radial and axial load capacity, making it suitable for applications with significant combined loads.
Advanced Cage Design: The phenolic resin cage offers superior strength-to-weight ratio, reduced friction, and excellent performance at high rotational speeds, contributing to the bearing's limiting speed of 16,000 rpm.
Universal Matching Capability: As a Universal Matchable (SU) bearing supplied in a matched set of two, it provides flexibility in mounting configurations without requiring selective assembly, reducing installation time and complexity.
Premium Material Selection: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life under demanding operating conditions.
71920 ACE/P4ADGA Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning applications requiring precision and rigidity
- Precision Gearboxes: Industrial transmissions demanding high accuracy and reliability
- High-Speed Motors: Electric motors and generators operating at elevated speeds
- Medical Equipment: Dental handpieces, surgical tools, and diagnostic imaging systems
- Aerospace Components: Guidance systems, actuators, and auxiliary power units
- Robotics and Automation: Precision joints, rotary tables, and positioning systems
