71952 ACD/P4ADBC
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71952 ACD/P4ADBC
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
25 °
Ball & Washer Dimensions
Ball diameter
30.162 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
98100 lbf
Radial static load rating
180000 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
Moderate / Class C
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
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71952 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 71952 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for applications demanding exceptional rigidity and accuracy. This P4A tolerance class bearing features a back-to-back (DB) matched arrangement, providing superior stability and the ability to withstand combined radial and axial loads. With a moderate preload (Class C) and a 25° contact angle, it delivers high running accuracy and is optimized for high-speed operation up to 4,500 rpm, making it ideal for high-precision, high-reliability machinery.
71952 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
The model number 71952 ACD/P4ADBC is decoded as follows:
- 71952: Basic bearing series and size designation (260mm bore, 360mm OD).
- A: Denotes a 25° contact angle.
- C: Indicates a Moderate Preload (Class C).
- D: Specifies a Duplex Back-to-Back (DB) mounting arrangement.
- /P4A: Signifies a high precision tolerance class exceeding ABEC 7/ISO P4.
- DBC: Confirms the bearing is supplied as a pre-matched duplex set in a Back-to-Back arrangement with Moderate Preload.
71952 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide, rigid support system that effectively resists moment loads and shaft deflection, ensuring precise shaft positioning.
- Superior Load Capacity: Engineered to handle significant combined loads. The 25° contact angle provides excellent axial load carrying capacity in both directions.
- Optimized High-Speed Performance: The lightweight phenolic cage minimizes centrifugal forces, reduces friction, and contributes to the high limiting speed of 4,500 rpm. The bearing is supplied lubricated for immediate operation.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, guaranteeing high running accuracy and consistent performance.
- Durable Construction: Components made from chrome steel offer high hardness and fatigue resistance, ensuring a long operational life under demanding conditions.
71952 ACD/P4ADBC Bearing Typical Application Areas
This bearing is ideally suited for high-precision and high-speed applications, including:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-Frequency Machining Centers
- Precision Gearboxes
- Industrial Pumps and Compressors
- Medical and Laboratory Equipment
