71932 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71932 ACD/P4ADBC
Basic Information
System of measurement
Metric
Weight
5.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
160 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
220 mm
Outside diameter tolerance
-0.004mm to 0
Width
56 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
44775 lbf
Radial static load rating
68625 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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71932 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71932 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched back-to-back (DB) arrangement is preloaded to Moderate / Class C standards, providing superior system stiffness and rotational precision. Its primary advantage lies in its ability to handle combined loads—significant radial and axial loads in both directions—simultaneously. Manufactured to a P4A tolerance class, it is an ideal solution for high-precision, high-rigidity machinery where minimal runout and stable performance are critical.
71932 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Basic bearing series and size designation (160mm bore, 220mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Duplex (Two single bearings are matched as a set). |
| DB | Back-to-Back mounting arrangement. |
| P4A | High precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
71932 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and ensures exceptional operational stability under heavy combined loads.
- Superior Load Capacity: With a radial dynamic load rating of 44,775 lbf and a static load rating of 68,625 lbf, this bearing is engineered to withstand demanding operational conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the 25° contact angle provides an excellent balance for high-speed operation, achieving a limiting speed of 11,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore, outside diameter, and width, ensuring minimal runout and precise shaft positioning.
- Durable Construction: Components made from chrome steel offer high wear resistance and long service life, suitable for a temperature range of -30°C to 110°C.
71932 ACD/P4ADBC Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Speed & Precision Gearboxes
- Industrial Pumps and Compressors
- Precision Rotary Tables and Indexing Heads
- Medical and Laboratory Equipment
