71968 CDMA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71968 CDMA/P4A
Basic Information
System of measurement
Metric
Weight
25.5 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
340 mm
Bore diameter tolerance
-0.016mm to 0
Outside diameter
460 mm
Outside diameter tolerance
-0.02mm to 0
Width
56 mm
Width tolerance
-0.3mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
38.1 mm
Ball quantity
29
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
87750 lbf
Radial static load rating
150750 lbf
Limiting speed
3.8 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 12398.71
/ each
In Stock
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71968 CDMA/P4A Bearing Product Overview & Core Advantages
The 71968 CDMA/P4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional rotational accuracy and rigidity. This precision bearing is distinguished by its P4 (ABEC-7) tolerance class, ensuring minimal runout and superior performance. Its key advantage lies in its ability to accommodate high combined loads, efficiently handling significant radial loads and thrust loads in one direction simultaneously. The optimized 15° contact angle provides an excellent balance between radial load capacity and axial thrust capacity, making it ideal for demanding, high-speed machinery. It comes pre-lubricated for immediate operation and features a phenolic cage for stable performance at high rotational speeds.
71968 CDMA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71968 | Basic bearing number, defining the standard dimensions (340mm bore, 460mm OD, 56mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and combined loads. |
| DM | Indicates a matched arrangement. While this is a single bearing, this suffix often signifies it is manufactured to be paired with another for duplex sets, offering high rigidity. |
| A | Denotes that the bearing is supplied with a specific preload. This reduces axial and radial play, enhancing system rigidity and rotational accuracy. |
| P4 | The tolerance class is P4 (ABEC-7), representing ultra-precision manufacturing standards for minimal dimensional variation and superior running accuracy. |
71968 CDMA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to a P4 tolerance class and supplied with an internal preload, this bearing delivers exceptional system stiffness and precise shaft guidance, critical for applications like machine tool spindles.
- Superior Load Capacity: The angular contact design with a 15° contact angle is engineered to support high combined loads. With a dynamic load rating of 87,750 lbf and a static load rating of 150,750 lbf, it ensures reliable performance under heavy-duty conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces and ensures cage stability, contributing to the high limiting speed of 3,800 rpm. The open design allows for efficient lubrication management.
- Durable Construction: Components made from chrome steel provide high hardness, wear resistance, and a long operational life. The bearing is pre-lubricated for immediate startup and reliable operation within a temperature range of -30°C to 110°C.
71968 CDMA/P4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is ideally suited for applications demanding high speed, rigidity, and accuracy. Key industries and machinery include:
- Machine Tool Spindles: For milling, grinding, and turning centers where high rotational accuracy and rigidity are paramount.
- High-Speed Pumps and Compressors: Where reliable performance under combined radial and axial loads is required.
- Precision Gearboxes and Turbines: For supporting shafts that require minimal deflection and high-speed capability.
- Industrial Robotics and Automation: In critical joints and drive systems that demand high positional accuracy and repeatability.
