S71915 ACEGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71915 ACEGB/P4A
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
105 mm
Outside diameter tolerance
-0.004mm to 0
Width
16 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
9.525 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4770 lbf
Radial static load rating
3600 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
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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S71915 ACEGB/P4A Bearing Product Overview & Core Advantages
The S71915 ACEGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a single bearing that is Universal Matchable (SU), it can be paired with another identical bearing to form a precisely preloaded set. Its primary advantages include the ability to handle combined loads (radial and axial) simultaneously, outstanding operational stability due to its P4A tolerance class, and high-speed capability facilitated by its phenolic cage and optimized design. This bearing is engineered for high reliability in demanding, precision-driven environments.
S71915 ACEGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S | Designates a super-precision bearing. |
| 7 | Indicates an angular contact design. |
| 1915 | Specifies the bore (75mm) and outside diameter (105mm) dimensions. |
| AC | Signifies a 25° contact angle, offering a balanced capacity for radial and axial loads. |
| E | Denotes an optimized internal design for higher load capacity and speed. |
| GB | Indicates a Light preload / Class B. |
| P4A | Specifies an ultra-high tolerance class for running accuracy, tighter than ABEC 7. |
S71915 ACEGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design with a 25° contact angle provides excellent rigidity and enables the bearing to support significant combined radial and axial loads.
- Superior High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 28,000 rpm. The grease lubrication is suitable for this high-speed range.
- Exceptional Precision: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration, which is critical for applications requiring high rotational accuracy.
- Universal Matching (SU): As a Universal Matchable bearing, two S71915 ACEGB/P4A bearings can be mounted together in a universal arrangement to achieve a defined preload without selective matching, simplifying installation and enhancing system stiffness.
- Sealed & Lubricated for Life: The sealed design protects against contamination, and the factory-applied grease provides long-term, maintenance-free operation within the specified temperature range.
S71915 ACEGB/P4A Bearing Typical Application Areas
This super-precision bearing is ideally suited for high-performance machinery where accuracy and speed are paramount. Key applications include:
- Machine Tool Spindles for high-speed milling, grinding, and turning centers.
- High-frequency Spindles in PCB drilling and routing machines.
- Precision Robotic Drives and automation systems.
- High-speed Compressors and pumps.
- Advanced Medical Equipment and precision instruments.
