71917 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71917 ACDGC/P4A
Basic Information
System of measurement
Metric
Weight
0.53 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
120 mm
Outside diameter tolerance
-0.004mm 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°C to 110 °C
Radial dynamic load rating
9810 lbf
Radial static load rating
10238 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71917 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71917 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This single-row bearing features a 25° contact angle and is supplied as a Universal Matchable (SU) set, allowing for precise preload configuration when mounted in pairs. Its P4A tolerance class ensures ultra-precise dimensions and runout control, making it ideal for high-speed spindles and other precision machinery where minimal deflection and superior performance are critical.
71917 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71917 ACDGC/P4A is decoded as follows:
- 71917: Basic bearing series, indicating a light-weight, high-precision angular contact design with an 85mm bore.
- AC: Angular Contact design.
- D: High contact angle (25° in this specification).
- GC: Specific internal clearance and preload group (Moderate / Class C).
- P4A: High-precision tolerance class exceeding ABEC 7/ISO P4, with enhanced width and runout tolerances.
71917 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust chrome steel construction enable the bearing to support significant combined (radial and axial) loads, providing a stable and rigid support structure.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration. The lightweight phenolic cage ensures stable operation and contributes to a high limiting speed of 28,000 rpm.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it is designed to be used in pairs (back-to-back or face-to-face) to create a preloaded set that enhances system stiffness and rotational accuracy.
- Durable Construction: Components made from high-grade chrome steel and a phenolic cage offer excellent durability and performance within a temperature range of -30°C to 110°C.
71917 ACDGC/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for applications requiring high speed, high rigidity, and exceptional accuracy, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Industrial Pumps and Compressors
- Aerospace & Defense Actuators
