71808 ACDGA/HCP4
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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71808 ACDGA/HCP4 Bearing Product Overview & Core Advantages
The 71808 ACDGA/HCP4 is a single-row angular contact ball bearing engineered for ultra-precision applications. Operating within the P4 tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its 25° contact angle is optimized to support significant combined loads (radial and axial) simultaneously. Featuring a lightweight phenolic cage and ceramic balls, this bearing achieves superior high-speed performance with a limiting speed of 56,000 rpm. The extra light preload (Class A) ensures minimal running torque and precise shaft positioning, making it ideal for demanding, high-accuracy systems.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71808 | Basic bearing series and size designation (40mm bore, 52mm OD, 7mm width) |
| AC | Angular Contact design with a 25° contact angle |
| DGA | Universal Matchable (SU) bearing, designed for pre-set paired mounting |
| HCP4 | Hybrid Ceramic (balls) and P4 (ABEC 7) precision tolerance class |
71808 ACDGA/HCP4 Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends service life at high speeds. This construction also provides superior resistance to electrical erosion.
Precision Phenolic Cage: The lightweight phenolic cage offers excellent dimensional stability and low friction, contributing directly to the bearing's high limiting speed and smooth operation.
High Rigidity & Load Capacity: The 25° contact angle and robust internal geometry enable the bearing to handle substantial combined radial and axial loads effectively, providing stable and rigid support for the shaft.
Ultra-Precision Performance: Manufactured to P4 tolerance class with an extra light preload, this bearing ensures minimal runout, high positional accuracy, and low vibration levels, which is critical for precision machinery.
71808 ACDGA/HCP4 Bearing Typical Application Areas
The 71808 ACDGA/HCP4 is ideally suited for high-performance applications requiring precision and speed, including:
- High-Frequency Machine Tool Spindles
- Precision Grinding Spindles
- High-Speed Robotic Drives
- Medical & Dental Handpiece Motors
- Aerospace Actuators & Instrumentation
- Semiconductor Manufacturing Equipment
