S71917 ACEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71917 ACEGA/P4A
Basic Information
System of measurement
Metric
Weight
0.52 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
120 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
23
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6322 lbf
Radial static load rating
4860 lbf
Limiting speed
17 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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S71917 ACEGA/P4A Bearing Product Overview & Core Advantages
The S71917 ACEGA/P4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. Engineered with an Extra Light (A) preload and manufactured to P4A tolerance class, this bearing delivers superior rotational precision and running accuracy. Its 25° contact angle is optimized to handle combined loads, efficiently supporting significant radial loads and axial loads in one direction. The sealed design with phenolic cage makes it suitable for high-speed operation up to 17,000 rpm, offering a compact and rigid solution for critical machinery.
S71917 ACEGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| S71917 | Basic bearing designation | Indicates the bearing series and size (85mm bore, 120mm OD, 18mm width) |
| AC | Angular Contact design | Optimized for combined radial and axial loads |
| EGA | Universal Matchable (SU) bearing set | Bearing can be universally matched in sets of 3 for optimal preload and stiffness |
| P4A | Tolerance class | Super precision grade with enhanced running accuracy and dimensional stability |
S71917 ACEGA/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: Manufactured to P4A tolerance class with an Extra Light preload (Class A), this bearing provides exceptional running accuracy and system stiffness, minimizing deflection under load.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable it to handle significant combined radial and axial loads simultaneously, with a dynamic load rating of 6322 lbf and static load rating of 4860 lbf.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the grease lubrication and sealed design contribute to a high limiting speed of 17,000 rpm.
- Sealed & Pre-lubricated: The integrated seals protect against contamination and retain lubricant, offering long-term, maintenance-free operation within a temperature range of -30°C to 110°C.
- Universal Matching Capability: As part of the Universal Matchable (SU) series, these bearings can be supplied in sets of 3, allowing for precise preload adjustment and optimal performance in matched arrangements.
S71917 ACEGA/P4A Bearing Typical Application Areas
The S71917 ACEGA/P4A is ideally suited for high-precision, high-speed applications across various industries, including:
- Machine Tool Spindles: For CNC machining centers, grinding spindles, and other precision metalworking equipment requiring high rigidity and accuracy.
- High-Speed Motors & Spindles: In electric motors, frequency converter drives, and high-RPM industrial spindles.
- Precision Instrumentation: Used in measuring devices, optical scanners, and laboratory equipment where minimal runout is critical.
- Robotics & Automation: For robot arm joints, rotary tables, and other automated systems demanding precise motion control.
