7017 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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7017 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7017 ACD/P4ATBTB is a super-precision angular contact ball bearing designed for the most demanding applications. This triplex back-to-back (TBT) matched set delivers exceptional system rigidity and stability, making it ideal for machine tool spindles and other high-precision machinery. Its P4A tolerance class ensures ultra-precise running accuracy, while the light preload (Class B) minimizes deflection under operational loads. This configuration is engineered to handle combined radial and axial loads simultaneously with superior performance.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7017 | Basic bearing series and size designation (85mm bore, 130mm OD). |
| ACD | Angular Contact design with a 25° contact angle. |
| P4A | Indicates a high-precision tolerance class exceeding ABEC 7/ISO P4 standards. |
| TBT | Specifies the bearing arrangement as a Triplex Back-to-Back matched set of three bearings. |
7017 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Ultra-High Rigidity & Stability: The triplex back-to-back (TBT) arrangement of three bearings creates an exceptionally stiff bearing system that resists moment loads and minimizes shaft deflection, which is critical for maintaining machining accuracy.
- Superior Load Capacity: The 25° contact angle and robust construction, featuring chrome steel rings and balls, provide high dynamic and static load ratings (31,050 lbf and 41,850 lbf respectively) for handling significant combined loads.
- High-Speed Capability: The lightweight and durable phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to a high limiting speed of 17,000 rpm.
- Precision Performance: Manufactured to P4A tolerance class with a light preload, this bearing set guarantees low noise, minimal vibration, and precise rotational accuracy for high-speed spindles.
- Optimized Lubrication: The bearing is pre-lubricated for immediate use, with an operational temperature range of -30°C to 110°C.
7017 ACD/P4ATBTB Bearing Typical Application Areas
This super-precision angular contact ball bearing set is engineered for high-performance applications where maximum rigidity and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed CNC machining centers, grinding spindles, and milling spindles.
- Precision Industrial Machinery: High-frequency spindles, precision boring machines, and coordinate measuring machines.
- High-Speed Automation: Robotic arm joints and high-speed positioning systems.
