71960 CDMA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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71960 CDMA/P4A Bearing Product Overview & Core Advantages
The 71960 CDMA/P4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing with a 15° contact angle, it is optimized to support combined loads, handling significant radial loads alongside unidirectional axial loads. Its P4 (ABEC-7) tolerance class ensures superior running accuracy, making it ideal for high-speed spindles and precision machinery. The bearing is supplied with a preload for enhanced system stiffness and is pre-lubricated for immediate operation.
71960 CDMA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71960 | Basic bearing designation, defining the bearing dimensions (300mm bore, 420mm OD, 56mm width). |
| C | Specifies a 15° contact angle, optimized for high-speed operation and high rigidity. |
| DM | Indicates a duplex matched bearing arrangement. While the spec states "Single," this code typically signifies a universal match for face-to-face (DF) or back-to-back (DB) mounting. |
| A | Denotes that the bearing is supplied with a preload for increased system stiffness. |
| P4 | The tolerance class, equivalent to ABEC-7, indicating very high precision in dimensions and running accuracy. |
71960 CDMA/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: Manufactured to P4 tolerance class, this bearing guarantees minimal runout and vibration, which is critical for applications requiring extreme positional accuracy. The preload further enhances system rigidity, reducing deflection under load.
Superior Load Capacity: The 15° contact angle design allows the 71960 CDMA/P4A to efficiently support combined radial and axial loads. With a high dynamic load rating of 83475 lbf, it offers excellent longevity under demanding operating conditions.
Optimized High-Speed Performance: The lightweight phenolic resin cage minimizes centrifugal forces, contributing to a high limiting speed of 4,300 rpm. This makes it a prime choice for high-speed spindle applications.
Robust Material Construction: Components made from chrome steel provide high hardness, wear resistance, and durability, ensuring consistent performance across its specified temperature range of -30°C to 110°C.
71960 CDMA/P4A Bearing Typical Application Areas
The 71960 CDMA/P4A is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key application areas include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring ultra-fine surface finishes.
- High-Frequency Motors: Spindles for PCB drilling and routing.
- Industrial Pumps and Compressors: For precise rotor positioning and high-speed operation.
