S7004 ACDGB/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7004 ACDGB/P4A Bearing Product Overview & Core Advantages
The S7004 ACDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding the highest levels of accuracy and performance. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously with exceptional stability. Manufactured to the stringent P4A tolerance class, this bearing ensures minimal runout and vibration, making it ideal for high-speed spindles and other high-precision machinery. The phenolic cage and optimized internal geometry contribute to its superior high-speed capabilities and smooth operation.
S7004 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7004: Basic designation for a super-precision angular contact ball bearing series with a 20mm bore, 42mm OD, and 12mm width.
- AC: Angular Contact design.
- D: Specific internal design and contact angle optimized for high rigidity and speed.
- GB: Indicates a Universal Matchable (SU) bearing, designed to be mounted in sets (in this case, a set of 3) to achieve specific preload and stiffness characteristics.
- P4A: The tolerance class, denoting extremely tight dimensional and running accuracy standards superior to ABEC 7.
S7004 ACDGB/P4A Bearing Structural Features & Performance Benefits
The performance of the S7004 ACDGB/P4A is a direct result of its advanced construction:
- High Rigidity and Load Capacity: The 25° contact angle and robust design provide excellent resistance to combined loads, ensuring stable operation under demanding conditions.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel components minimize friction, allowing for a high limiting speed of 100,500 rpm.
- Precision and Stability: The P4A tolerance class guarantees exceptional dimensional accuracy and running precision, which is critical for applications requiring minimal vibration and high rotational accuracy.
- Optimized for Matched Sets: As a Universal Matchable bearing, it is supplied ready to be installed in pre-determined sets (of 3) to provide a defined light preload (Class B), simplifying installation and ensuring consistent, high system stiffness.
S7004 ACDGB/P4A Bearing Typical Application Areas
This bearing is engineered for the most demanding applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: High-accuracy joints and arm assemblies.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
