S7017 ACD/P4ADBD
Sealed Super Precision Angular Contact Ball Bearings
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S7017 ACD/P4ADBD Bearing Product Overview & Core Advantages
The S7017 ACD/P4ADBD is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched bearing set features a heavy preload (Class D) and P4A super-precision tolerance, making it ideal for high-speed spindles and other machinery demanding minimal runout and maximum stability. Its duplex DB arrangement is engineered to withstand combined radial and axial loads simultaneously, providing superior operational reliability in the most demanding conditions.
S7017 ACD/P4ADBD Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S7017 | Basic bearing series and size designation (85mm bore, 130mm OD, 44mm width) |
| ACD | Angular Contact, Duplex arrangement (specifically Back-to-Back/DB) |
| P4A | Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards |
| DB | Duplex Back-to-Back mounting configuration for high moment rigidity |
S7017 ACD/P4ADBD Bearing Structural Features & Performance Benefits
High Rigidity & Precision: The duplex back-to-back (DB) arrangement with heavy preload creates an exceptionally stiff bearing system that resists deflection under complex loading conditions. Combined with P4A tolerance class, this ensures minimal vibration and precise rotational accuracy.
Superior Load Capacity: With a 25° contact angle and optimized internal geometry, this bearing set delivers excellent performance under combined radial and axial loads. The dynamic load rating of 23,400 lbf and static load rating of 27,450 lbf provide substantial load-carrying capability.
High-Speed Capability: The phenolic resin cage offers excellent dimensional stability and reduced friction at high speeds, supporting a limiting speed of 17,000 rpm. This makes the bearing suitable for high-speed machining applications.
Sealed & Lubricated Design: As a sealed bearing with factory-applied grease lubrication, it offers protection against contamination and is ready for immediate installation without additional lubrication requirements.
S7017 ACD/P4ADBD Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers, grinding spindles
- High-Speed Machining Equipment - CNC milling machines, precision lathes
- Precision Rotary Tables - Indexing and positioning systems
- Industrial Robotics - High-accuracy robot joints and actuators
- Medical Equipment - CT scanners, dental machining equipment
- Aerospace Components - Guidance systems, precision actuators
