S7021 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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S7021 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7021 ACDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered with a 25° contact angle and an Extra Light (A) preload, this bearing is optimized to handle combined radial and axial loads simultaneously. Its construction using ceramic balls and a phenolic cage contributes to superior high-speed capabilities and reduced rotating mass. As a P4A tolerance class bearing, it guarantees extremely tight dimensional and running accuracy, making it ideal for ultra-precise, high-rigidity spindles and machinery.
S7021 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- S70: Denotes a high-precision angular contact ball bearing series.
- 21: Specifies the bore diameter code (105 mm).
- AC: Angular Contact design.
- D: Signifies a duplex (matched) bearing configuration.
- GA: Indicates a specific internal clearance and preload combination (Extra Light / Class A).
- /HC: Hybrid Ceramic - Denotes the use of ceramic balls.
- P4A: The tolerance class, specifying super-precision levels for dimensional and running accuracy.
S7021 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High Rigidity and Load Capacity: The duplex matched design and 25° contact angle provide superior stiffness, enabling the bearing to effectively support combined loads and moment loads in high-precision applications.
Superior High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic resin cage allows for significantly higher limiting speeds (10,000 rpm) with less heat generation and improved dynamic response.
Precision and Longevity: Manufactured to P4A super-precision standards, this bearing ensures minimal runout and vibration. The universal matchable (SU) designation allows bearings to be mounted in various preloaded configurations (back-to-back, face-to-face, or tandem) without selective assembly, simplifying installation and optimizing system performance.
Pre-Lubricated and Sealed: The bearing comes pre-greased for immediate operation and is sealed to protect the high-precision internals from contamination, ensuring reliability and a long service life.
S7021 ACDGA/HCP4A Bearing Typical Application Areas
The S7021 ACDGA/HCP4A is ideally suited for the most demanding high-speed and high-precision machinery, including:
- Machine Tool Spindles (CNC milling, grinding, and turning centers)
- High-Frequency Machining Spindles
- Precision Robotics and Automation Equipment
- Aerospace Test and Measurement Equipment
- Medical Device Manufacturing Machinery
