71917 ACD/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71917 ACD/P4A
Basic Information
System of measurement
Metric
Weight
0.53 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.008mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
25
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
9810 lbf
Radial static load rating
10238 lbf
Limiting speed
15 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 992.23
/ each
In Stock
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71917 ACD/P4A Bearing Product Overview & Core Advantages
The 71917 ACD/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4 (ABEC-7) tolerance class, this bearing is designed to accommodate high combined loads, primarily thrust loads in one direction, with a 25° contact angle that optimizes the balance between radial and axial load capacity. Its phenolic resin cage and factory-applied lubrication contribute to superior high-speed performance and smooth operation, making it an ideal solution for demanding machine tool spindles and precision instruments.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71917 | Basic bearing series and size designation (85mm bore, 120mm OD, 18mm width) |
| AC | Angular Contact design with a 25° contact angle |
| D | High contact angle design for increased thrust load capacity |
| P4A | P4 (ABEC-7) precision tolerance class with specific running accuracy requirements |
71917 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The single-row angular contact design with a 25° contact angle provides optimal stiffness for applications requiring minimal deflection under load. Manufactured to P4 tolerance class, it ensures exceptional running accuracy and dimensional stability.
- Superior Load Capacity: Engineered to handle significant combined radial and axial loads, with a dynamic load rating of 9810 lbf and static load rating of 10238 lbf. The optimized raceway geometry maximizes load distribution.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, while the factory lubrication enables operation at limiting speeds up to 15,000 rpm, making it suitable for high-speed spindle applications.
- Pre-Configured Performance: Available with preload options for immediate installation with predetermined internal clearance, ensuring consistent performance and reduced setup time in precision assemblies.
71917 ACD/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-precision machining centers, grinding spindles, and CNC milling machines
- Precision Instruments: Measuring equipment, optical instruments, and laboratory apparatus
- High-Speed Motors: Electric spindle motors and high-frequency motor applications
- Robotics: Precision robotic joints and automation equipment requiring high accuracy
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
