S71913 ACE/HCP4ADBA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S71913 ACE/HCP4ADBA
Basic Information
System of measurement
Metric
Weight
0.34 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
26 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
24
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5738 lbf
Radial static load rating
5220 lbf
Limiting speed
31 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S71913 ACE/HCP4ADBA Bearing Product Overview & Core Advantages
The S71913 ACE/HCP4ADBA is a precision duplex back-to-back angular contact ball bearing designed for applications requiring exceptional rigidity and rotational accuracy. This P4A tolerance class bearing features a ceramic ball and phenolic cage construction, enabling superior high-speed performance up to 31,000 rpm. Its extra light preload (Class A) and 25° contact angle are optimized to handle significant combined radial and axial loads simultaneously, making it ideal for high-precision, high-reliability machinery where minimal deflection is critical.
S71913 ACE/HCP4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| 71913 | Basic bearing series and size designation (65mm bore, 90mm OD). |
| ACE | Designates a 25° contact angle and specific internal design for high-speed operation. |
| HC | Indicates the use of hybrid ceramic balls (Silicon Nitride), reducing centrifugal forces and enabling higher speeds. |
| P4A | Specifies a high-precision tolerance class with enhanced running accuracy for critical applications. |
| DB | Denotes a Duplex Back-to-Back arrangement, providing high moment rigidity. |
| A | Specifies an Extra Light Preload for minimal friction and optimal high-speed performance. |
S71913 ACE/HCP4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Moment Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing exceptional system rigidity.
- Superior High-Speed Performance: The combination of hybrid ceramic balls and a lightweight phenolic cage reduces rotating mass and centrifugal forces, allowing for a high limiting speed of 31,000 rpm.
- Precision & Accuracy: Manufactured to P4A tolerance class standards, this bearing ensures minimal runout and vibration, which is critical for maintaining precision in demanding applications.
- Optimized Load Handling: The 25° contact angle is engineered to efficiently support substantial combined radial and axial loads, while the extra light preload minimizes heat generation and ensures smooth operation.
- Sealed & Lubricated for Life: As a sealed bearing pre-lubricated with grease, it is protected from contamination and is maintenance-free within its specified temperature range of -30°C to 110°C.
S71913 ACE/HCP4ADBA Bearing Typical Application Areas
This high-performance duplex angular contact ball bearing is engineered for the most demanding precision applications, including:
- High-Speed Machine Tool Spindles
- Precision Grinding Spindles
- High-Frequency Machining Centers
- Advanced Robotics and Automation Arms
- Medical and Dental Equipment Spindles
- Aerospace Actuation Systems
