S71913 CEGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71913 CEGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.17 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
65 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
13 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3712 lbf
Radial static load rating
2745 lbf
Limiting speed
36 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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S71913 CEGA/HCP4A Bearing Product Overview & Core Advantages
The S71913 CEGA/HCP4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and reliability. As a single bearing with Universal Matchable (SU) designation, it can be paired with another identical bearing to form a precisely preloaded set, offering superior performance. Its construction enables it to handle combined loads (radial and axial) simultaneously, making it ideal for high-speed, high-rigidity applications. The combination of a ceramic ball material and P4A tolerance class ensures ultra-precise operation and extended service life.
S71913 CEGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number S71913 CEGA/HCP4A breaks down into the following technical specifications:
- S7: Indicates a series of high-precision, high-speed angular contact ball bearings.
- 1913: Denotes the bearing size with a 65mm bore, 90mm outside diameter, and 13mm width.
- C: Specifies a 15° contact angle, optimized for high-speed applications requiring high rigidity.
- E: Designates a reinforced phenolic resin cage, contributing to low weight and high-speed capability.
- GA: Signifies a specific preload class (Extra light / Class A).
- HC: Indicates the use of hybrid ceramic balls (Silicon Nitride).
- P4A: Represents an ultra-precision tolerance class superior to ABEC 7, ensuring minimal runout and vibration.
S71913 CEGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single bearing design with a 15° contact angle and P4A tolerance class provides exceptional rotational accuracy and system stiffness, crucial for machine tool spindles and other precision equipment.
- Superior High-Speed Performance: The combination of a lightweight phenolic cage and low-density ceramic balls reduces centrifugal forces, enabling a high limiting speed of 36,000 rpm. This makes it an excellent high-speed bearing.
- Enhanced Durability and Life: Hybrid ceramic balls offer superior hardness, reduced friction, and electrical resistance compared to steel, leading to longer bearing life and improved reliability in demanding conditions.
- Optimized for Matched Sets: As a Universal Matchable (SU) bearing, it is manufactured to be paired with a second bearing, creating a preloaded set that delivers precise axial and radial positioning without additional components.
S71913 CEGA/HCP4A Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- High-Frequency Motors and Spindles
- Precision Robotics: Arm joints and rotary actuators.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
