71952 CD/P4ADBD
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71952 CD/P4ADBD
Basic Information
System of measurement
Metric
Weight
24.4 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
260 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
360 mm
Outside diameter tolerance
-0.004mm to 0
Width
92 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
30.162 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
103950 lbf
Radial static load rating
191250 lbf
Limiting speed
4.5 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
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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71952 CD/P4ADBD Bearing Product Overview & Core Advantages
The 71952 CD/P4ADBD is a precision angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This duplex back-to-back (DB) arrangement comes as a pre-matched set, delivering superior performance under combined loads. With a P4A tolerance class and heavy preload (Class D), it provides high running accuracy and stiffness, making it ideal for high-precision, high-rigidity spindles and other critical machinery components.
71952 CD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
The model number 71952 CD/P4ADBD is decoded as follows:
- 71952: Basic bearing series, indicating a metric, angular contact design.
- C: Signifies a 15° contact angle, optimized for high rigidity and moderate axial load capacity.
- D: Indicates the heavy preload (Class D) for maximum system stiffness.
- P4A: Denotes an ultra-precision tolerance class with enhanced dimensional and running accuracy.
- DB: Specifies the Duplex Back-to-Back mounting arrangement, which increases moment rigidity and stability.
71952 CD/P4ADBD Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement of two pre-matched bearings significantly enhances system rigidity and resistance to moment loads, ensuring precise shaft positioning.
- Superior Load Capacity: Engineered with a 15° contact angle and heavy preload, this bearing effectively handles combined radial and axial loads simultaneously.
- Precision Performance: Manufactured to P4A tolerance class standards, it guarantees minimal runout and high rotational accuracy for demanding applications.
- Optimized Cage Design: The phenolic resin cage offers excellent strength-to-weight ratio and smooth operation at high speeds, contributing to the bearing's limiting speed of 4,500 rpm.
- High-Quality Materials: Both rings and balls are made from chrome steel, ensuring high durability, wear resistance, and a long operational lifespan.
71952 CD/P4ADBD Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications requiring maximum precision and rigidity, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Precision Gearboxes
- Industrial Pumps and Compressors
- Precision Rotary Tables
- Aerospace and Defense Positioning Systems
