S71913 ACEGA/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71913 ACEGA/P4A Bearing Product Overview & Core Advantages
The S71913 ACEGA/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. Manufactured to P4A tolerance class, this bearing features a 25° contact angle and an extra light preload (Class A), making it ideal for handling combined radial and axial loads simultaneously. Its compact design, with a 65 mm bore and 13 mm width, provides a high-stiffness solution for spindle arrangements and other high-precision machinery where minimal runout and reliable operation are critical.
Model Code Breakdown
- S7: High-precision bearing series
- 1913: Standard dimension series (19: width series, 13: bore code for 65mm)
- AC: 25° contact angle
- EGA: Universal Matchable (SU designation), supplied in a set of 2 bearings (Number of bearings in matched set: 2)
- P4A: Tolerance class exceeding ABEC 7, with enhanced running accuracy and dimensional stability
S71913 ACEGA/P4A Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The angular contact design with a 25° contact angle enables the bearing to support significant combined loads. The universal matching (SU) allows two bearings to be paired for optimal load distribution and preload control, resulting in a very rigid system.
High-Speed Performance: The phenolic resin cage is lightweight and robust, contributing to lower centrifugal forces and enabling a high limiting speed of 31,000 rpm. This makes it suitable for demanding high-speed applications.
Precision & Longevity: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures precise shaft positioning and smooth operation. The chrome steel rings and balls, combined with preloaded grease lubrication, provide reliable performance within a temperature range of -30°C to 110°C.
S71913 ACEGA/P4A Bearing Typical Application Areas
The S71913 ACEGA/P4A is ideally suited for high-precision, high-speed rotational systems, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aerospace Instrumentation
