71932 ACD/P4ATBTB
71900 Series Super Precision Angular Contact Ball Bearings
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71932 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 71932 ACD/P4ATBTB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This triplex back-to-back (TBT) matched set is preloaded to Light / Class B, delivering superior system stability and minimal runout. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads—simultaneously, making it an ideal choice for high-speed, high-rigidity spindle systems. Manufactured to a P4A tolerance class, it guarantees outstanding rotational precision and operational reliability.
71932 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 71932 | Bearing series and size designation | Indicates a 160mm bore, 220mm OD, 84mm width bearing. |
| ACD | 25° Contact Angle | Optimized for high axial load capacity and high-speed performance. |
| P4A | Tolerance Class | Denotes ultra-precision dimensional and running accuracy, superior to ABEC 7. |
| TBT | Triplex Back-to-Back | Specifies a set of three bearings matched and mounted back-to-back to withstand moment loads and provide maximum system rigidity. |
71932 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity: The triplex back-to-back arrangement creates an extremely rigid bearing system, capable of resisting complex moment loads and minimizing deflection under heavy cutting forces.
- High Load Capacity: With a 25° contact angle and a radial dynamic load rating of 59,625 lbf, this bearing is engineered to handle demanding combined loads in both radial and axial directions.
- Optimized High-Speed Performance: The lightweight phenolic cage ensures stable operation and reduced centrifugal forces at high speeds, contributing to a limiting speed of 11,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing ensures precise shaft positioning, low vibration, and extended service life in precision machinery.
71932 ACD/P4ATBTB Bearing Typical Application Areas
The 71932 ACD/P4ATBTB is specified for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Internal and external grinding machines.
- High-Frequency Motor Spindles: Used in PCB drilling and precision engraving.
- Industrial Pumps & Compressors: For applications requiring high axial stiffness.
