S71908 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S71908 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S71908 ACDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a single, universal-match design with a 25° contact angle, enabling it to handle combined loads (radial and axial) simultaneously. Its construction with ceramic balls and a phenolic cage contributes to its status as a high-speed bearing, offering low friction, high rigidity, and extended service life. Preloaded to an extra-light (Class A) specification, it ensures precise shaft positioning and smooth operation, making it ideal for high-reliability scenarios.
S71908 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| S71908 | Basic bearing designation; indicates a 40mm bore, 62mm OD, 12mm width angular contact ball bearing. |
| AC | Angular Contact design with a 25° contact angle. |
| DGA | Universal Matchable (SU) bearing. Two bearings are supplied as a matched set for precise preload and optimal performance. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls, which reduce weight, friction, and heat generation, enhancing high-speed performance. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
S71908 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and extra-light preload provide high system rigidity, effectively supporting combined loads and moment loads.
- Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a high limiting speed of 41,000 rpm, minimizing friction and heat buildup.
- Precision and Longevity: Manufactured to P4A tolerance class, this bearing guarantees minimal runout and vibration. The integral seals retain grease and protect against contamination, contributing to a long, maintenance-free service life.
- Thermal Stability: The phenolic cage and ceramic balls offer excellent performance across the specified temperature range (-30°C to 110°C).
S71908 ACDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles
- High-Frequency Motors and Spindles
- Precision Grinding Equipment
- Dental and Medical Handpieces
- Aerospace Actuators and Instrumentation
