S7017 ACD/P4AQBCA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7017 ACD/P4AQBCA
Basic Information
System of measurement
Metric
Weight
3.64 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
85 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.004mm to 0
Width
88 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
37800 lbf
Radial static load rating
55125 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Grease
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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S7017 ACD/P4AQBCA Bearing Product Overview & Core Advantages
The S7017 ACD/P4AQBCA is a P4A super-precision quadruplex matched angular contact ball bearing arranged in a Back-to-Back (QBC) configuration. Engineered for the most demanding applications, this set delivers exceptional high rigidity and stability under complex combined loads, including radial, axial, and moment loads. The extra light preload (Class A) ensures minimal friction and optimal running accuracy, making it ideal for high-speed spindles requiring superior rotational precision and thermal management.
S7017 ACD/P4AQBCA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7017 | Bore: 85 mm, OD: 130 mm, Width: 22 mm (Single Bearing) | Standard bearing dimensions for the 7017 series. |
| ACD | 25° Contact Angle, Double-Row Design | Optimized for high axial load capacity and high rigidity. |
| P4A | Super Precision Tolerance Class | Exceeds ABEC 7/ISO P4 standards, ensuring ultra-low runout and vibration for exceptional rotational accuracy. |
| QBC | Quadruplex Back-to-Back Arrangement | Four bearings are precision-matched and preloaded as a set to provide maximum system stiffness and moment load resistance. |
S7017 ACD/P4AQBCA Bearing Structural Features & Performance Benefits
- Superior Rigidity & Load Capacity: The quadruplex back-to-back (QBC) arrangement creates an exceptionally stiff bearing system capable of handling heavy combined loads (radial, bidirectional axial, and moment loads) simultaneously. This is critical for maintaining positional accuracy under cutting forces.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the optimized internal geometry and 25° contact angle contribute to stable operation at the high limiting speed of 17,000 rpm.
- Precision & Thermal Stability: The P4A tolerance and extra light preload guarantee minimal running torque and heat generation. The matched set ensures uniform load distribution and predictable thermal growth.
- Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, the set is protected from contamination and is designed for long-term, maintenance-free operation within its specified temperature range.
S7017 ACD/P4AQBCA Bearing Typical Application Areas
This high-performance precision bearing set is specifically designed for advanced machinery requiring the utmost in accuracy and stiffness:
- High-Speed Machine Tool Spindles (CNC machining centers, grinding spindles)
- Precision Grinding Machines
- High-frequency Main Spindles
- Other high-precision rotary applications where system rigidity and running accuracy are paramount.
