71912 ACE/P4ADBA
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71912 ACE/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.38 kg
Tolerance class
P4A
Seal type
Open
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
36 X 1000 rpm
Lubrication
Lubricated
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
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71912 ACE/P4ADBA Bearing Product Overview & Core Advantages
The 71912 ACE/P4ADBA is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running precision. Its duplex back-to-back (DB) arrangement and extra light preload (Class A) enable it to withstand combined loads (radial and axial) simultaneously while providing high system stiffness and excellent operational stability, making it ideal for high-speed, high-precision machinery.
71912 ACE/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| 71912 | Basic designation: 60 mm bore, 85 mm OD, 26 mm width |
| ACE | 25° contact angle, extra light preload |
| P4A | High precision tolerance class exceeding ABEC 7 standards |
| DB | Duplex Back-to-Back matched arrangement |
71912 ACE/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back configuration creates a rigid bearing system that effectively resists moment loads and supports substantial combined radial and axial loads.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and vibration for precise applications.
- Optimized High-Speed Operation: The phenolic resin cage provides excellent strength-to-weight ratio, reduced friction, and superior guidance at the limiting speed of 36,000 rpm.
- Superior Material Construction: Made from chrome steel for both rings and balls, offering high hardness, wear resistance, and long service life under demanding conditions.
- Preloaded Configuration: The extra light preload (Class A) eliminates internal clearance, enhancing shaft positioning accuracy and system stiffness without excessive torque increase.
71912 ACE/P4ADBA Bearing Typical Application Areas
- Machine Tool Spindles: High-precision milling, grinding, and turning centers
- High-Speed Machining Centers: CNC machining equipment requiring extreme accuracy
- Precision Instrumentation: Measuring devices, optical equipment, and laboratory instruments
- Robotics & Automation: Robot arm joints, precision positioning systems
- Aerospace Components: Gyroscopes, navigation systems, and aircraft instrumentation
