71928 ACD/P4ATGA
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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71928 ACD/P4ATGA Bearing Product Overview & Core Advantages
The 71928 ACD/P4ATGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and reliability. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and rotational precision. Its extra light preload (Class A) minimizes deflection under light loads, making it ideal for high-speed spindles and precision machinery. The bearing is universally matchable (SU), allowing for flexible mounting arrangements in duplex sets to handle combined loads effectively. Pre-lubricated for immediate operation, it offers reliable performance within a temperature range of -30°C to 110°C.
71928 ACD/P4ATGA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71928 | Basic bearing series and size designation (140mm bore, 190mm OD) |
| AC | Angular Contact design with 25° contact angle |
| D | High precision bearing designation |
| P4A | Ultra-precision tolerance class with enhanced running accuracy |
| TGA | Special technical specification for high-performance applications |
71928 ACD/P4ATGA Bearing Structural Features & Performance Benefits
Precision Engineering: Manufactured to P4A tolerance standards, this bearing ensures minimal runout and vibration for superior rotational accuracy in precision applications.
High-Speed Capability: Featuring a phenolic cage and optimized internal geometry, the bearing achieves a limiting speed of 11,000 rpm, making it suitable for high-speed spindle applications.
Superior Load Capacity: With a 25° contact angle and robust construction, it efficiently handles combined radial and axial loads, rated at 43,875 lbf dynamic and 75,375 lbf static capacity.
Universal Matching Design: The SU universal matchability allows for flexible mounting in various preload configurations (DB, DF, DT) without selective matching, simplifying installation and maintenance.
Premium Materials: Constructed from chrome steel for both rings and balls, ensuring high durability and wear resistance in demanding operating conditions.
71928 ACD/P4ATGA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers requiring exceptional accuracy and speed
- Precision Instrumentation: Measuring equipment, optical systems, and laboratory instruments
- High-Speed Motors: Spindle motors and high-frequency drive systems
- Aerospace Components: Guidance systems, actuator mechanisms, and auxiliary power units
- Medical Equipment: High-speed dental handpieces, surgical tools, and diagnostic imaging systems
