S71908 ACE/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71908 ACE/HCP4ADGA Bearing Product Overview & Core Advantages
The S71908 ACE/HCP4ADGA is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. This sealed bearing features a universal matchable (SU) design, allowing two bearings to be paired in any combination for simplified mounting and optimal performance. Its ceramic balls and P4A super-precision tolerance enable superior high-speed operation and minimal vibration. The combination of a 25° contact angle and an extra light preload (Class A) provides high rigidity and excellent running accuracy, making it ideal for applications subject to combined radial and axial loads.
S71908 ACE/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- S71908: Basic bearing series designation
- ACE: Specific internal design features (contact angle, preload)
- HC: Hybrid Ceramic (steel rings with ceramic balls)
- P4A: Super-precision tolerance class (exceeding ABEC 7)
- DGA: Designates specific cage material and lubrication
S71908 ACE/HCP4ADGA Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls provides significant advantages including reduced friction, higher limiting speeds, and extended service life. Ceramic balls are electrically insulating and have superior resistance to wear and thermal deformation.
Phenolic Resin Cage: The lightweight phenolic cage offers excellent dimensional stability at high speeds and contributes to smooth operation with minimal friction.
Universal Matchable Design (SU): This feature allows any two bearings to be mounted together without selective matching, simplifying installation and ensuring consistent preload characteristics and running accuracy.
Sealed & Pre-lubricated: The integrated seals protect against contamination while the factory-applied high-performance grease ensures immediate operation and long-term reliability within the specified temperature range of -30°C to 110°C.
S71908 ACE/HCP4ADGA Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Applications
- Medical & Dental Equipment
- Aerospace Actuation Systems
- Semiconductor Manufacturing Equipment
- High-Frequency Motors & Spindles
