S71917 ACB/P4A
Sealed Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71917 ACB/P4A
Basic Information
System of measurement
Metric
Weight
0.59 kg
Tolerance class
P4 (ABEC-7)
Seal type
Sealed
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
6.747 mm
Ball quantity
37
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
3442 lbf
Radial static load rating
3442 lbf
Limiting speed
13 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:
$ 1190.54
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71917 ACB/P4A Bearing Product Overview & Core Advantages
The S71917 ACB/P4A is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. As a single-row bearing with a 25° contact angle, it excels at supporting combined loads—simultaneously handling significant radial forces and unidirectional axial thrust. Manufactured to the exacting P4 (ABEC-7) tolerance class, it ensures minimal runout and vibration, making it ideal for high-speed spindles and other precision machinery. Its preload availability allows for optimized system stiffness and enhanced positional accuracy.
S71917 ACB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix | Interpretation | Technical Significance |
|---|---|---|
| ACB | Contact Angle & Internal Clearance | Designates a 25° contact angle and a specific internal clearance group, optimized for preload and high rigidity. |
| P4A | Tolerance Class | Indicates compliance with the P4 (ABEC-7) precision class, ensuring extremely tight dimensional and running accuracy tolerances. |
S71917 ACB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The 25° contact angle and availability of preload provide superior system stiffness, critical for minimizing deflection under load in high-precision applications.
- Optimized Load Capacity: Engineered to efficiently support combined radial and axial loads in one direction, leveraging the high dynamic and static load ratings (3442 lbf).
- High-Speed Capability: The lightweight phenolic resin cage ensures excellent stability and low friction, contributing to the high limiting speed of 13,000 rpm.
- Sealed & Lubricated for Life: As a sealed bearing that is pre-lubricated, it is protected from contamination and is ready for immediate installation, offering long-term, maintenance-free operation within its specified temperature range.
S71917 ACB/P4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Medical and Dental Equipment
- High-Speed Robotic Drives
