S71917 ACDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71917 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.54 kg
Tolerance class
P4A
Seal type
Sealed
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
Grease
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71917 ACDGB/P4A Bearing Product Overview & Core Advantages
The S71917 ACDGB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Operating under the P4A tolerance class, it delivers superior running precision. Its 25° contact angle and phenolic cage are optimized for high-speed operation, with a limiting speed of 28,000 rpm. This bearing is engineered to handle combined loads (radial and axial) simultaneously, making it an ideal choice for high-performance spindles and precision machinery where reliability is critical.
S71917 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71917 | Basic bearing designation, indicating a metric series, angular contact ball bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| DGB | Universal Matchable (SU) bearing in a back-to-back (DB) arrangement. This set of four bearings is pre-configured for high rigidity. |
| P4A | Indicates a high-precision tolerance class, superior to ABEC 7, ensuring minimal runout and vibration. |
S71917 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design with a 25° contact angle and the matched set of four bearings in a back-to-back arrangement provide exceptional system rigidity and the ability to sustain significant combined radial and axial loads.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to smooth operation at the high limiting speed of 28,000 rpm.
- Precision & Reliability: Manufactured to P4A tolerance class, this bearing ensures minimal running noise and vibration, which is critical for the accuracy of precision machinery.
- Sealed & Pre-Lubricated: The sealed design with grease lubrication protects against contamination and provides long-term, maintenance-free operation within the specified temperature range.
S71917 ACDGB/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- Advanced Robotics: Precision joints and rotary axes.
