71817 CD/P4DGA
71800 Series Super Precision Angular Contact Ball Bearings
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71817 CD/P4DGA Bearing Product Overview & Core Advantages
The 71817 CD/P4DGA is a precision angular contact ball bearing designed for high-performance applications requiring exceptional rotational accuracy and rigidity. As part of the Universal Matchable (SU) series, it is engineered to be paired with an identical bearing to form a pre-loaded set, delivering superior system stability. Its Extra light preload (Class A) and P4 tolerance class ensure minimal runout and smooth operation, making it ideal for machine tool spindles and other high-precision machinery where high rigidity and high-speed capability are critical.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71817 | Basic bearing designation, indicating a metric angular contact ball bearing with 85mm bore, 110mm OD, and 26mm width. |
| CD | Contact angle of 15° and optimized internal design for high-speed operation. |
| P4 | Indicates a high-precision tolerance class for applications requiring extreme accuracy and minimal runout. |
| DGA | Universal Matchable (SU) designation, meaning the bearing is supplied as one of a pair (2 bearings) that are pre-matched for optimal performance when mounted together. |
71817 CD/P4DGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design and Universal Matchable (SU) pairing enable the bearing set to withstand significant combined loads (radial and axial) simultaneously. The Extra light preload eliminates internal clearance, resulting in high system stiffness and precise shaft positioning.
High-Speed Performance: Featuring a lightweight phenolic cage and a 15° contact angle, this bearing is optimized for high-speed applications, achieving a limiting speed of 28,000 rpm. The open design allows for efficient lubrication management.
Precision & Durability: Manufactured to P4 tolerance standards from high-grade chrome steel for both rings and balls, this bearing guarantees long-term dimensional stability and wear resistance in demanding operational environments.
71817 CD/P4DGA Bearing Typical Application Areas
- Machine Tool Spindles: For high-precision milling, grinding, and turning centers requiring extreme accuracy and rigidity.
- High-Speed Machining Centers: Where high rotational speeds and minimal vibration are paramount.
- Precision Grinding Spindles: Demanding applications that benefit from the bearing's P4 precision class and stability.
- Industrial Pumps & Compressors: For shafts operating under combined radial and axial loads.
