S7008 ACDGB/HCP4A
Hybrid Ceramic Super Precision Bearings
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S7008 ACDGB/HCP4A Bearing Product Overview & Core Advantages
The S7008 ACDGB/HCP4A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. As a universally matchable single bearing (SU designation), it is supplied in sets of two that can be precisely preloaded against each other to achieve optimal system rigidity. Its ceramic ball construction and P4A super-precision tolerance class make it an ideal solution for high-speed spindles and other precision machinery where high rigidity and minimal runout are critical. This bearing is pre-lubricated with grease and sealed for long-term, maintenance-free operation.
S7008 ACDGB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Model Segment | Technical Meaning |
|---|---|
| S7008 | Basic bearing series, 40mm bore, 68mm OD, 15mm width |
| AC | 25° Contact Angle |
| D | High Preload: Light / Class B |
| GB | Sealed on both sides |
| HC | Hybrid Ceramic balls (Ceramic balls with steel rings) |
| P4A | Super Precision Tolerance class, equivalent to ABEC 7 |
S7008 ACDGB/HCP4A Bearing Structural Features & Performance Benefits
Hybrid Ceramic Construction: The use of ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and enables higher limiting speeds (41,000 rpm) compared to all-steel equivalents. This construction also provides superior resistance to electrical erosion.
Optimized Cage Design: The phenolic cage offers excellent strength-to-weight ratio and smooth operation at high speeds, contributing to the bearing's exceptional dynamic performance.
Precision Ground Components: Manufactured to P4A tolerance class with tight dimensional control on bore, OD, and width, ensuring precise fitment and minimal vibration in high-speed applications.
Sealed & Pre-lubricated: The integrated seals protect against contamination while the factory-applied grease provides reliable lubrication across the specified temperature range (-30°C to 110°C), enabling maintenance-free operation.
Universal Matching Capability: As a Universal Matchable (SU) bearing supplied in sets of two, they can be arranged in back-to-back, face-to-face, or tandem configurations to handle combined loads including radial and axial loads in both directions.
S7008 ACDGB/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and precision lathes
- High-Speed Motors: Servo motors, spindle motors, and high-frequency motor applications
- Precision Instrumentation: Measuring equipment, optical scanners, and laboratory instruments
- Aerospace Components: Gyroscopes, navigation systems, and auxiliary power units
- Medical Equipment: Dental handpieces, surgical tools, and imaging devices
