71908 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71908 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71908 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and rigidity. Engineered to a P4A tolerance class, it offers superior dimensional and running accuracy. This bearing is capable of supporting combined loads (radial and axial) simultaneously and is optimized for high-speed operation, making it an ideal choice for machine tool spindles and other precision machinery where high rigidity and reliability are paramount.
71908 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71908 | Basic bearing series and size designation |
| AC | Angular Contact design with a 25° contact angle |
| DGC | Universal Matchable (SU) bearing designed for moderate preload (Class C) when mounted in a set |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
71908 ACDGC/P4A Bearing Structural Features & Performance Benefits
Optimized Internal Geometry: The 25° contact angle provides an excellent balance between radial and axial load capacity, enhancing performance under combined loads.
High-Speed Phenolic Cage: The phenolic resin cage ensures low friction, reduced weight, and excellent dimensional stability at high speeds, contributing to the bearing's limiting speed of 41,000 rpm.
Superior Precision & Rigidity: Manufactured to P4A tolerance class with tight dimensional control on the bore diameter, outside diameter, and width, this bearing delivers high running accuracy and system stiffness.
Universal Matching Design: As a Universal Matchable (SU) bearing, it can be supplied in sets (3 bearings in a matched set) to achieve a defined moderate preload (Class C) without selective assembly, simplifying installation and ensuring consistent performance.
71908 ACDGC/P4A Bearing Typical Application Areas
The 71908 ACDGC/P4A is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Rotary Tables
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- Aerospace Instrumentation
