7215 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7215 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.04 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.004mm to 0
Width
25 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
15502 lbf
Radial static load rating
13162 lbf
Limiting speed
22 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7215 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7215 ACDGA/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single bearing features a 25° contact angle and an Extra Light (Class A) preload, making it ideal for arrangements requiring high rigidity and minimal deflection under complex loading conditions. Its ceramic ball construction and P4A tolerance class ensure superior high-speed performance and operational precision, while the universal matchable (SU) designation allows for flexible mounting in duplex sets to handle combined loads effectively.
7215 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7215 ACDGA/HCP4A breaks down into the following technical specifications:
- 7215: Basic series number, indicating a 75mm bore and 130mm outside diameter.
- AC: Angular Contact design.
- D: High contact angle (25°).
- GA: Specific internal design and preload (Extra Light / Class A).
- /HC: Hybrid Ceramic, indicating ceramic balls.
- P4A: High precision tolerance class exceeding ABEC 7/ISO P4.
7215 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction, heat generation, and wear. This enables a higher limiting speed (22,000 rpm) and extended service life compared to all-steel bearings, especially in high-speed applications.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and guidance at high rotational speeds, contributing to smooth and quiet operation.
- High Rigidity & Load Capacity: The 25° contact angle and Class A preload provide superior stiffness, enabling the bearing to effectively support combined radial and axial loads with minimal shaft displacement.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width, this bearing guarantees high running accuracy and consistent performance in precision machinery.
7215 ACDGA/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where speed, precision, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and auxiliary power units.
- High-Speed Motors and Spindles: Electric motors, CNC router spindles, and dental handpieces.
