7215 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7215 CDGA/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
15 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
16088 lbf
Radial static load rating
13950 lbf
Limiting speed
22 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 347.69
/ each
In Stock
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7215 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7215 CDGA/HCP4A is a single row angular contact ball bearing engineered for ultimate precision and performance in demanding applications. Positioned in the P4A super-precision tolerance class, it delivers exceptional rotational accuracy and dimensional stability. Its 15° contact angle and ceramic ball construction are optimized for handling high axial loads and achieving superior high-speed capabilities. The bearing is universally matchable (SU), allowing for precise preload control when mounted in pairs or sets, making it an ideal solution for high-rigidity spindles and other precision machinery requiring uncompromising accuracy and reliability.
7215 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7215 | Basic bearing series, defining the boundary dimensions: 75 mm bore, 130 mm outside diameter, 25 mm width. |
| C | Specifies a 15° contact angle, optimized for high-speed operation and axial load capacity. |
| DG | Indicates the bearing is universally matchable (SU). Two bearings can be paired in a duplex arrangement to support combined loads. |
| A | Denotes an Extra Light preload class, minimizing friction and heat generation for high-speed applications. |
| HC | Refers to the use of Hybrid Ceramic balls (Silicon Nitride), which reduce centrifugal forces, lower operating temperature, and extend service life. |
| P4A | Specifies the super-precision tolerance class, ensuring extremely tight dimensional and running accuracy for the most demanding applications. |
7215 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Design: The use of ceramic balls significantly reduces weight and inertia, enabling higher limiting speeds (22,000 rpm). This material also provides superior resistance to wear and operates effectively across a wide temperature range (-30°C to 110°C).
- Precision & Rigidity: Manufactured to P4A tolerance standards with an extra light preload, this bearing offers exceptional running accuracy and system stiffness, which is critical for minimizing vibration and deflection in precision spindles.
- Optimized Cage & Lubrication: The phenolic resin cage is lightweight and robust, contributing to smooth operation at high speeds. The bearing comes pre-lubricated for immediate use and long-term performance.
- 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 CDGA/HCP4A Bearing Typical Application Areas
This high-precision angular contact ball bearing is specifically designed for advanced machinery where speed, accuracy, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors: Spindles for PCB drilling and other micro-machining applications.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation.
- Medical Equipment: High-speed dental handpieces and imaging device rotors.
