S71912 ACE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71912 ACE/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.32 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
7.938 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5648 lbf
Radial static load rating
4950 lbf
Limiting speed
32.5 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71912 ACE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71912 ACE/HCP4ADBA is a super-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This duplex back-to-back (DB) matched pair configuration delivers superior high rigidity and stability, enabling it to handle combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class and featuring a 25° contact angle, it is engineered for high-speed operation and precise rotational accuracy in critical machinery.
S71912 ACE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7 | Indicates a series of high-precision, high-speed angular contact ball bearings. |
| 1912 | Denotes the bearing size series with a 60 mm bore diameter. |
| ACE | Signifies a 25° contact angle and Extra light (A) preload. |
| HC | Refers to the Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Specifies the super-precision tolerance class, exceeding ABEC 7/ISO P4 standards. |
| DB | Indicates the bearings are supplied as a Duplex Back-to-Back matched set. |
S71912 ACE/HCP4ADBA Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds compared to all-steel bearings. Ceramic balls also offer superior resistance to wear and electrical arcing.
- Duplex Back-to-Back (DB) Arrangement: This matched set configuration provides high moment stiffness and excellent operational stability, making it ideal for applications with overturning moments. It can accommodate combined radial and axial loads from both directions.
- Phenolic Resin Cage: The lightweight and robust phenolic cage ensures smooth operation at very high speeds (32,500 rpm), offering excellent strength and guidance with minimal friction.
- Super-Precision P4A Tolerances: With tight bore, outside diameter, and width tolerances, this bearing guarantees exceptional running accuracy, reduced vibration, and predictable performance in precision spindles.
- Pre-lubricated & Sealed: The bearing is pre-lubricated with high-performance grease and features integral seals, providing long-term, maintenance-free operation within its specified temperature range.
S71912 ACE/HCP4ADBA Bearing Typical Application Areas
This high-precision, high-speed bearing is specifically designed for advanced applications where accuracy, rigidity, and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed CNC machining centers, grinding spindles, and milling spindles.
- Precision Robotics: High-accuracy robotic arm joints and servo motors.
- Aerospace & Defense: Gyroscopes, navigation systems, and auxiliary power units (APUs).
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
