S71917 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71917 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.46 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
11.112 mm
Ball quantity
25
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
9810 lbf
Radial static load rating
10238 lbf
Limiting speed
11 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:
$ 1190.52
/ each
In Stock
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S71917 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71917 ACD/HCP4A is a high-precision, single-row angular contact ball bearing engineered for applications demanding exceptional accuracy and rigidity. Its defining feature is the 25° contact angle, which is optimized to support significant combined loads—handling both radial and one-directional axial loads simultaneously with high efficiency. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees superior running accuracy. The bearing is preloaded and comes sealed and pre-lubricated, making it a compact, ready-to-install solution for high-speed, high-reliability scenarios where minimal maintenance is critical.
S71917 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71917 | Denotes the bearing series and size. A single-row, high-precision angular contact bearing with an 85mm bore. |
| AC | Angular Contact design with a 25° contact angle. |
| D | Indicates a high internal design and preload specification. |
| HC | Refers to the Hybrid Ceramic construction, featuring ceramic balls. |
| P4A | Specifies the P4 (ABEC-7) tolerance class, denoting very high precision. |
S71917 ACD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces weight and centrifugal forces, lowers operating temperature, and provides superior resistance to wear and electrical arcing. This directly enables a higher limiting speed of 11,000 rpm.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures excellent guidance and stability at high speeds, contributing to smooth operation and extended service life.
- High Rigidity & Load Capacity: The 25° contact angle and preload provide high system rigidity, allowing the bearing to effectively handle combined radial and axial loads (Dynamic: 9810 lbf, Static: 10238 lbf).
- Sealed & Lubricated for Long Life: The integral seals protect against contamination, and the factory-applied lubrication ensures immediate operation and long-term, maintenance-free performance within a temperature range of -30° to 110 °C.
S71917 ACD/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery requiring high speed, precision, and reliability. Key applications include:
- Machine Tool Spindles
- High-Frequency Motors and Spindles
- Precision Grinding Equipment
- Aerospace Actuation Systems
- Medical and Dental Handpieces
