S71917 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
S71917 ACB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.56 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
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
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/HCP4A Bearing Product Overview & Core Advantages
The S71917 ACB/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. As a single-row bearing, it is optimized to handle combined loads, supporting significant radial loads and axial loads in one direction simultaneously. Its defining features include a P4 (ABEC-7) tolerance class for superior running accuracy, a 25° contact angle for high axial load capacity, and a preload option for enhanced system rigidity. The combination of a phenolic cage and ceramic balls contributes to its high-speed capabilities, low friction, and extended service life, making it an ideal choice for high-reliability, high-rotation precision machinery.
S71917 ACB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Advantage |
|---|---|---|
| ACB | Angular Contact Bearing with a specific internal design and 25° contact angle. | Optimized for handling high axial loads and providing high rigidity. |
| HC | Hybrid Ceramic, indicating the use of ceramic balls. | Reduced friction, higher limiting speed, longer life, and operation with less lubrication. |
| P4A | Denotes a P4 tolerance class (ABEC-7) with specific accuracy requirements. | Ensures extremely low runout and vibration for superior precision in high-speed applications. |
S71917 ACB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class, this bearing ensures minimal dimensional variation and high running accuracy, which is critical for maintaining precise spindle positioning and reducing vibration.
- Superior High-Speed Performance: The lightweight phenolic resin cage and low-density silicon nitride (Si3N4) ceramic balls significantly reduce centrifugal forces, enabling a high limiting speed of 16,000 rpm. This combination also provides excellent dimensional stability under thermal loads.
- Enhanced Load Capacity: The 25° contact angle is optimally designed to support substantial axial loads in combination with radial loads, making it suitable for applications with significant thrust forces.
- Long Service Life and Reliability: Ceramic balls are harder and smoother than steel, leading to dramatically reduced wear. They are also electrically insulating and resistant to corrosion, contributing to a longer and more reliable operational life even in challenging conditions.
- Pre-lubricated and Sealed: The bearing comes lubricated and sealed, protecting against contamination and retaining lubricant, which simplifies installation and provides maintenance-free operation over a wide temperature range (-30° to 110 °C).
S71917 ACB/HCP4A Bearing Typical Application Areas
This precision bearing is designed for high-performance applications where speed, accuracy, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines.
- Precision Medical Equipment: Dental handpieces, high-speed centrifuges, and imaging device rotors.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power unit (APU) components.
- High-Frequency Motors and Spindles: Electric motors for robotics, PCB drilling spindles, and semiconductor manufacturing equipment.
