7215 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7215 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
1.04 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
75 mm
Bore diameter tolerance
-0.007mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.009mm to 0
Width
25 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
17
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
16088 lbf
Radial static load rating
13950 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 837.37
/ each
In Stock
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7215 CD/HCP4A Bearing Product Overview & Core Advantages
The 7215 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional accuracy and performance. This single-row bearing is distinguished by its 15° contact angle and is supplied with a preload, ensuring high system rigidity and minimal axial and radial runout. Its construction with a phenolic cage and ceramic balls enables superior high-speed performance, while the P4 (ABEC-7) tolerance class guarantees ultra-precise operation. This bearing is designed to handle combined loads, with a significant capacity for thrust loads, making it an ideal solution for high-rigidity, high-speed spindles.
7215 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7215 CD/HCP4A provides detailed technical specifications:
- 7215: Basic series designation, indicating a 75 mm bore and 130 mm outside diameter.
- C: Denotes a 15° contact angle, optimized for high-speed applications.
- D: Indicates the bearing is supplied with a preload for enhanced rigidity.
- HC: Signifies the use of Hybrid Ceramic components (ceramic balls with steel rings).
- P4: Specifies the tolerance class equivalent to ABEC-7, ensuring ultra-precision.
- A: Indicates a 30° contact angle (Note: This appears to be a conflict with the "C" designation for 15°. In practice, the "C" typically takes precedence for this model, indicating a 15° angle).
7215 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and silicon nitride (Si3N4) ceramic balls reduces centrifugal forces, lowers operating temperature, and significantly increases the limiting speed (20,000 rpm). This also provides electrical insulation and extended service life.
- High Rigidity & Preload: The applied preload eliminates internal clearance, resulting in superior stiffness and precise rotational accuracy, which is critical for machine tool spindles.
- Optimized High-Speed Cage: The phenolic (resin) cage is lightweight and possesses excellent sliding properties, contributing to smooth operation and high-speed capability with minimal friction.
- Precision Engineering: Manufactured to a P4 tolerance class, this bearing ensures minimal runout and vibration, directly contributing to the finish quality of machined parts.
- High Load Capacity: With a dynamic load rating of 16,088 lbf and a static load rating of 13,950 lbf, it reliably handles significant combined radial and axial loads.
7215 CD/HCP4A Bearing Typical Application Areas
This high-performance bearing is ideally suited for applications where speed, precision, and rigidity are paramount:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications requiring extreme accuracy and fine surface finishes.
- High-Frequency Motors and Spindles: Used in PCB drilling and other high-RPM electric motors.
- Aerospace & Defense Systems: Gyroscopes, navigation systems, and other critical rotating assemblies.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
