S7210 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Main Dimensions
Ball & Washer Dimensions
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S7210 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The S7210 ACDGA/HCP4A is a high-precision, single-row angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads—primarily high radial loads and substantial thrust loads in one direction—this bearing is characterized by its extra light preload (Class A) and P4A super-precision tolerance. Its construction, featuring a phenolic cage and ceramic balls, is optimized for high-speed operation and superior rigidity, making it an ideal choice for high-reliability, high-rotation accuracy scenarios where space is at a premium.
S7210 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series.
- 210: Standard dimension series; Bore: 50 mm, Outside Diameter: 90 mm, Width: 20 mm.
- AC: Angular Contact design with a 25° contact angle.
- D: High-Grade Phenolic (Resin) Cage.
- GA: Universal Matchable (SU designation), supplied in a set of 4 bearings for precise preload matching.
- HC: Hybrid Ceramic - Features ceramic balls for enhanced speed and durability.
- P4A: Super-precision tolerance class, exceeding ABEC 7/ISO P4 standards for runout and dimensional accuracy.
S7210 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
High-Speed & Rigidity: The combination of a lightweight phenolic cage and low-density ceramic balls significantly reduces centrifugal forces, enabling a high limiting speed of 34,000 rpm and providing high rotational rigidity.
Superior Load Capacity: The 25° contact angle is optimized to handle significant combined (radial and axial) loads, while the extra light preload ensures precise shaft positioning and minimal runout under operational conditions.
Extended Service Life & Reliability: Ceramic balls offer superior wear resistance, lower friction, and non-conductivity, reducing heat generation and the risk of electrical arcing. The bearing comes pre-lubricated with grease suitable for a wide operating temperature range (-30°C to 110°C).
Precision Engineering: Manufactured to P4A tolerance class, this bearing guarantees exceptional dimensional stability and running accuracy, which is critical for applications like high-speed spindles.
S7210 ACDGA/HCP4A Bearing Typical Application Areas
The S7210 ACDGA/HCP4A is ideally suited for high-performance machinery where precision and speed are paramount. Key industries and equipment include:
- Machine Tool Spindles (High-speed milling, grinding, and turning centers)
- Precision Robotics and Automation Arms
- High-Frequency Motors and Spindles
- Aerospace & Defense Systems (Gyroscopes, navigation equipment)
- Medical Equipment (Dental handpieces, high-speed centrifuges)
