S71913 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S71913 ACD/HCP4A Bearing Product Overview & Core Advantages
The S71913 ACD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and reliability. This single-row bearing features a 25° contact angle and is supplied with a preload, delivering superior running accuracy and high rigidity. Its compact design, with a 65 mm bore and 13 mm width, makes it ideal for space-constrained, high-speed spindles and precision instruments. The combination of a ceramic ball material and P4 (ABEC-7) tolerance class ensures outstanding performance under high-speed and combined load conditions.
S71913 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| S7 | Bearing series, indicating a specific internal design for high-precision applications. | Optimized for precision and high-speed operation. |
| 1913 | Standard size designation (65mm bore, 90mm OD, 13mm width). | Defines the bearing dimensions for compatibility. |
| ACD | 25° contact angle and a specific internal design optimized for high rigidity. | Enhanced capability to handle combined radial and axial loads. |
| HC | Hybrid Ceramic, signifying ceramic balls. | Reduced weight, lower friction, higher speed capability, and longer service life. |
| P4 | Tolerance class equivalent to ABEC-7. | Guarantees ultra-high precision and minimal runout for critical applications. |
S71913 ACD/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (15,000 rpm). This construction also offers superior resistance to wear and a longer operational lifespan.
High Rigidity and Preload: The 25° contact angle and factory-applied preload work in tandem to provide exceptional system stiffness, minimizing deflection under load and ensuring precise positioning and repeatability.
Optimized Cage and Lubrication: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to smooth high-speed operation. The bearing is pre-lubricated, ensuring immediate readiness for service and reliable performance within its specified temperature range of -30°C to 110°C.
Superior Load Capacity: With a dynamic load rating of 4388 lbf, this precision bearing is engineered to handle significant combined loads (radial and axial) simultaneously, making it suitable for demanding operational environments.
S71913 ACD/HCP4A Bearing Typical Application Areas
The S71913 ACD/HCP4A is ideally suited for high-performance machinery where precision, speed, and reliability are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instruments: Measuring devices, optical scanners, and coordinate measuring machines (CMM).
- High-Speed Motors and Drives: Servo motors, spindle motors, and robotics.
- Aerospace and Defense Systems: Gyroscopes, navigation equipment, and auxiliary power units.
