S71912 ACB/HCP4ADGB
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71912 ACB/HCP4ADGB
Basic Information
System of measurement
Metric
Weight
0.38 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
60 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
30
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3578 lbf
Radial static load rating
3735 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S71912 ACB/HCP4ADGB Bearing Product Overview & Core Advantages
The S71912 ACB/HCP4ADGB is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a universal matchable (SU) design, allowing two bearings to be mounted in any arrangement (back-to-back, face-to-face, or tandem) to optimize stiffness and load handling. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance and reduced rotational mass. Engineered to a P4A tolerance class, it delivers the high rigidity and running accuracy essential for precision spindles and machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| S71912 | Series designation for a high-precision, 60mm bore angular contact ball bearing. |
| ACB | Angular Contact Bearing with a 25° contact angle. |
| HCP4A | Indicates a P4A tolerance class (higher than ABEC 7) and a Light preload (Class B). |
| DGB | Specifies universal matchable (SU) bearings supplied as a set of 2. |
S71912 ACB/HCP4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The universal matchable design allows for paired mounting, creating a system capable of supporting significant combined loads (radial and axial) from both directions with high stiffness.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly lowers friction and inertia, enabling a high limiting speed of 36,000 rpm.
- Precision & Accuracy: Manufactured to a P4A tolerance class with strict bearing dimensions and geometric accuracy, ensuring smooth, quiet, and precise operation.
- Long-Term Reliability: The sealed construction retains factory-applied grease lubrication, protecting against contamination and providing maintenance-free operation within the specified temperature range.
S71912 ACB/HCP4ADGB Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- High-Frequency Motors & Spindles: Where extreme rotational accuracy and speed are critical.
- Medical & Dental Equipment: High-speed handpieces and imaging scanners.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
