S71905 CDTP/P4B
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71905 CDTP/P4B Bearing Product Overview & Core Advantages
The S71905 CDTP/P4B is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a single-row bearing with a 15° contact angle, it is optimized to support combined loads, primarily handling high radial loads alongside significant axial loads in one direction. Its P4 (ABEC-7) tolerance class ensures minimal runout and vibration, making it ideal for high-precision spindles. The bearing is preloaded and comes pre-lubricated from the factory, offering immediate, high-performance operation with excellent rigidity and limiting speeds up to 38,000 rpm.
S71905 CDTP/P4B Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7 | Indicates a series of super-precision angular contact ball bearings. |
| 1905 | Specifies the bore size (05 = 25 mm) and the dimensional series. |
| C | Denotes a 15° contact angle, optimized for high-speed operation. |
| DT | Signifies a matched pair arrangement in a back-to-back (DB) configuration for increased rigidity. |
| P4 | Specifies the P4 tolerance class (ABEC-7), indicating very high dimensional and running accuracy. |
| B | Indicates a preload level, ensuring minimal axial and radial play for high system stiffness. |
S71905 CDTP/P4B Bearing Structural Features & Performance Benefits
The performance of the S71905 CDTP/P4B is a direct result of its precision engineering and material selection.
- High Rigidity and Accuracy: Manufactured to P4 tolerance with a preload, this bearing provides exceptional system stiffness and minimizes deflection under load, which is critical for maintaining precision in machining and positioning.
- Optimized for High Speeds: The 15° contact angle and phenolic resin cage reduce centrifugal forces and friction, enabling a high limiting speed of 38,000 rpm. This makes it a premier choice for high-speed spindle bearings.
- Superior Load Capacity: With a dynamic load rating of 1521 lbf and a static load rating of 900 lbf, it reliably handles significant combined radial and axial loads.
- Sealed and Lubricated for Life: The bearing is sealed and pre-lubricated with a high-performance grease, protecting it from contaminants and providing maintenance-free operation within its specified temperature range of -30° to 110 °C.
S71905 CDTP/P4B Bearing Typical Application Areas
The S71905 CDTP/P4B is engineered for high-performance applications where precision, speed, and reliability are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high positional accuracy.
- High-Frequency Motors and Spindles: Used in PCB drilling and dental handpieces.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: Centrifuges and high-speed laboratory apparatus.
