S7021 CD/P4A
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
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S7021 CD/P4A Bearing Product Overview & Core Advantages
The S7021 CD/P4A is a precision single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Designed to accommodate primarily axial loads in one direction and combined loads, it features P4 (ABEC-7) tolerance class for superior running accuracy. Its phenolic cage, preload availability, and factory-applied lubrication make it an ideal solution for high-speed spindles and other high-performance machinery requiring reliable, long-term operation.
S7021 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
- S7021: Basic model number denoting a 105mm bore, 160mm OD, and 26mm width.
- C: Indicates a 15° contact angle, optimized for high-speed operation and axial load capacity.
- D: Signifies a matched preload applied to the bearing, enhancing system rigidity and rotational precision.
- P4A: Denotes a P4 tolerance class (equivalent to ABEC-7), ensuring extremely tight dimensional and running accuracy for precision applications.
S7021 CD/P4A Bearing Structural Features & Performance Benefits
High Rigidity and Precision: The single-row design with a matched preload (D) provides high system stiffness, minimizing deflection under load and ensuring precise shaft positioning. Manufactured to P4 tolerance class, it guarantees exceptional running accuracy.
Optimized Load Capacity: The 15° contact angle is engineered to efficiently handle high axial loads in one direction and combined (axial and radial) loads.
Superior High-Speed Performance: The lightweight and robust phenolic resin cage ensures stability and reduced centrifugal forces, contributing to the bearing's high limiting speed. The factory-applied lubrication is formulated for reliable performance at high rotational velocities.
S7021 CD/P4A Bearing Typical Application Areas
The S7021 CD/P4A is ideally suited for high-precision, high-speed applications, including:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aerospace Control Systems
