S7017 ACD/P4ATBTB
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7017 ACD/P4ATBTB
Basic Information
System of measurement
Metric
Weight
2.73 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
66 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
31050 lbf
Radial static load rating
41850 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Grease
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S7017 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The S7017 ACD/P4ATBTB is a precision angular contact ball bearing configured in a triplex back-to-back (TBT) matched set. This premium-grade bearing is engineered for applications demanding exceptional rotational accuracy, high system rigidity, and the ability to handle significant combined loads. Its P4A tolerance class and light preload (Class B) ensure smooth, precise operation in high-performance machinery, making it an ideal choice for demanding, high-speed environments.
S7017 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S7017 | Bearing Series & Size | Denotes a 85mm bore, 130mm OD, 66mm width bearing from a high-precision series. |
| ACD | Angular Contact, 25° Contact Angle | Optimized for carrying combined radial and axial loads. |
| P4A | Tolerance Class | Indicates ultra-precision running accuracy, superior to ABEC 7. |
| TBT | Triplex Back-to-Back | Three bearings are matched and mounted back-to-back to provide maximum system rigidity and moment load capacity. |
S7017 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Moment Load Capacity: The triplex back-to-back (TBT) arrangement creates an extremely stiff bearing system, effectively resisting moment loads and shaft deflection, which is critical for maintaining precision under heavy combined loads.
- High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and operates smoothly with minimal friction, contributing to the high limiting speed of 17,000 rpm. The 25° contact angle provides an optimal balance between axial load capacity and speed performance.
- Precision and Accuracy: Manufactured to P4A tolerance class with a light preload, this bearing set ensures minimal runout and precise shaft positioning, reducing vibration and noise for superior operational smoothness.
- Sealed and Pre-Lubricated: The sealed design with grease lubrication protects against contamination and provides long-term, maintenance-free operation within the specified temperature range of -30°C to 110°C.
S7017 ACD/P4ATBTB Bearing Typical Application Areas
This bearing is specifically designed for high-end, precision-driven applications, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and high-speed milling heads.
- Precision Gearboxes: Especially in robotics and aerospace actuation systems.
- High-Frequency Motors and Spindles: Used in PCB drilling and routing equipment.
- Medical and Laboratory Equipment: Such as high-speed centrifuges and imaging devices.
