71912 CD/P4ADGA
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71912 CD/P4ADGA
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
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
7178 lbf
Radial static load rating
6975 lbf
Limiting speed
31 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 266.65
/ each
In Stock
- Fast delivery
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71912 CD/P4ADGA Bearing Product Overview & Core Advantages
The 71912 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. This universal matchable (SU) bearing features an extra light preload (Class A) and is manufactured to P4A tolerance class, ensuring superior running accuracy. Its primary advantage lies in its ability to handle combined loads efficiently, making it ideal for high-speed spindles and precision machinery where rigidity and minimal thermal growth are critical. The open design, when properly lubricated, facilitates high-speed operation while maintaining dimensional stability.
71912 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 71912 CD/P4ADGA can be broken down as follows:
- 71912: Basic designation for a high-precision angular contact ball bearing series with a 60mm bore, 85mm OD, and 26mm width.
- C: Represents a 15° contact angle, optimized for high-speed applications requiring high rigidity.
- D: Indicates the internal design is optimized for high-precision performance.
- P4A: Denotes the tolerance class. P4A is a super-precision grade with very tight dimensional and running accuracy tolerances.
- DGA: Signifies the bearing is universally matchable (SU) and supplied as part of a pre-set duplex pair (2 bearings in a matched set). The "A" indicates an extra light preload.
71912 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4A tolerance class with an extra light preload, this bearing provides exceptional rotational accuracy and stiffness, minimizing deflection under load.
- Optimized for High Speeds: The 15° contact angle and phenolic resin cage reduce friction and centrifugal forces, enabling a high limiting speed of 31,000 rpm. The open design allows for efficient lubrication and heat dissipation.
- Superior Load Capacity: With a dynamic load rating of 7178 lbf and a static load rating of 6975 lbf, it reliably handles significant combined radial and axial loads.
- Universal Matchability (SU): Bearings marked SU can be mounted in any combination (back-to-back, face-to-face, or tandem) without a loss in preload, offering immense flexibility in spindle design.
- Durable Construction: Components made from chrome steel for rings and balls ensure high durability and fatigue resistance, suitable for a wide temperature range from -30°C to 110°C.
71912 CD/P4ADGA Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Aerospace and Defense Instrumentation
