7015 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7015 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.53 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
115 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
11858 lbf
Radial static load rating
11025 lbf
Limiting speed
24 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
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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7015 CDGA/HCP4A Bearing Product Overview & Core Advantages
The 7015 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This single bearing features a 15° contact angle and is manufactured to P4A super-precision tolerance standards, ensuring minimal runout and vibration. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, superior high-speed performance enabled by its phenolic cage and ceramic balls, and high operational rigidity. Preloaded as an extra light (Class A) set, it is universally matchable (SU), allowing for flexible mounting configurations in pairs to handle bidirectional thrust loads, making it ideal for high-reliability, high-speed spindles and precision machinery.
7015 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7015 | Standard bearing series designation, indicating a 75mm bore and 115mm outside diameter. |
| C | Specifies a 15° contact angle, optimized for high-speed applications and high axial load capacity. |
| DG | Indicates the bearing is universally matchable (SU). Two bearings can be mounted in any combination (face-to-face, back-to-back, or tandem) to handle complex load conditions. |
| A | Denotes the extra light preload (Class A), which minimizes friction and heat generation for optimal high-speed performance. |
| HC | Signifies the use of Hybrid Ceramic components, specifically ceramic balls, which reduce weight, centrifugal force, and provide superior performance at high speeds. |
| P4A | The tolerance class, signifying super-precision levels with extremely tight dimensional and running accuracy tolerances for critical applications. |
7015 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The use of ceramic balls with a steel ring significantly reduces rotational mass, lowering centrifugal forces and allowing for a higher limiting speed (24,000 rpm). This construction also offers improved stiffness, reduced heat generation, and extended service life.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent guidance for the ceramic balls, ensuring stable operation and high-speed capability with minimal friction.
- Super-Precision P4A Tolerance: Manufactured to the strictest P4A tolerance class, this bearing guarantees exceptional running accuracy, reduced vibration, and superior positional control, which is critical for machine tool spindles and other precision equipment.
- High Load Capacity & Rigidity: The 15° contact angle and optimized internal geometry provide high rigidity and the ability to support significant combined loads (radial dynamic load: 11,858 lbf / static: 11,025 lbf).
- Pre-lubricated & Open Design: The bearing comes lubricatedopen seal type, making it suitable for systems with centralized lubrication, though it requires a clean operating environment.
7015 CDGA/HCP4A Bearing Typical Application Areas
This high-performance bearing is engineered for the most demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision, rigidity, and speed are paramount.
- Precision Robotics: Arm joints and rotary actuators requiring high accuracy and minimal backlash.
- High-Frequency Spindles: PCB drilling, dental milling, and other applications involving very high rotational speeds.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other instrumentation requiring exceptional reliability and precision.
- High-Speed Pumps and Compressors: Where operational stability and high-speed capability are critical.
