71932 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71932 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
2.23 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
160 mm
Bore diameter tolerance
-0.01mm to 0
Outside diameter
220 mm
Outside diameter tolerance
-0.011mm to 0
Width
28 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° to 110 °C
Radial dynamic load rating
27900 lbf
Radial static load rating
34425 lbf
Limiting speed
9.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 2665.15
/ each
In Stock
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71932 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71932 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This single-row bearing is distinguished by its 25° contact angle and P4 (ABEC-7) tolerance class, making it an ideal solution for high-speed spindles and precision machinery. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed performance enabled by a phenolic cage and ceramic balls, and high operational reliability within a wide temperature range.
71932 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71932 | Standard bearing series designation, indicating a light series angular contact bearing with a 160mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high rigid design. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls for reduced friction and higher speed capability. |
| P4 | Specifies the P4 tolerance class (equivalent to ABEC-7), denoting very high precision bearing standards. |
| A | Indicates that the bearing is supplied with a specific preload for optimal stiffness and running accuracy. |
71932 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The combination of a 25° contact angle and an applied preload ensures maximum system stiffness and minimal runout, which is critical for machining accuracy.
- Superior High-Speed Performance: The phenolic resin cage offers excellent strength-to-weight ratio and guidance, while the ceramic (Si3N4) balls reduce centrifugal forces and friction, collectively enabling a high limiting speed of 9,500 rpm.
- Enhanced Load Capacity: The optimized internal geometry and high-grade chrome steel rings provide high dynamic and static load ratings (27,900 lbf / 34,425 lbf), reliably handling significant combined loads.
- Thermal Stability and Longevity: Ceramic balls have a lower coefficient of thermal expansion than steel, contributing to stable preload and performance across the operating temperature range of -30°C to 110°C.
71932 ACD/HCP4A Bearing Typical Application Areas
This precision angular contact bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling and routing machines.
- High-Frequency Motors: Spindles for electric vehicles and industrial automation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
