S7215 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7215 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
1.06 kg
Tolerance class
P4A
Seal type
Sealed
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
28 X 1000 rpm
Lubrication
Grease
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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In Stock
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S7215 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7215 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed and rigidity. Engineered to a P4A super-precision tolerance, it delivers superior running accuracy. A key feature is its universal matchable (SU) design, allowing two bearings to be paired in a back-to-back (DB) or face-to-face (DF) arrangement for optimal stiffness and moment load capacity. The combination of a phenolic resin cage and ceramic balls enables extremely high-speed operation up to 28,000 rpm, while the sealed design with pre-applied high-performance grease ensures long-term, maintenance-free service.
Model Code Breakdown
| Code Segment | Technical Meaning | Benefit |
|---|---|---|
| S7215 | Series designation for a 75mm bore, 130mm OD angular contact bearing. | Defines the core bearing dimensions. |
| C | 15° contact angle. | Optimized for high-speed applications with combined radial and axial loads. |
| DG | Universal matchable (SU) bearing for duplex sets. | Provides flexibility in mounting configurations for enhanced system rigidity. |
| A | Extra light preload. | Minimizes runout and ensures smooth, quiet operation at high speeds. |
| HCP4A | Tolerance class P4A (super precision) with specific internal clearance. | Guarantees extremely tight dimensional and running accuracy for the most demanding precision applications. |
S7215 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and universal matchable feature allow pairs of bearings to be preloaded, creating an exceptionally rigid bearing system capable of withstanding significant combined loads (radial and axial) and moment loads.
- Superior High-Speed Performance: The lightweight phenolic cage and low-density, low-friction ceramic (Si3N4) balls drastically reduce centrifugal forces and operating temperature, enabling stable operation at the high limiting speed of 28,000 rpm.
- Precision & Longevity: Manufactured to P4A tolerance with a 15° contact angle, this bearing ensures minimal vibration and precise shaft positioning. The sealed construction protects the optimized internal geometry from contamination, extending service life.
- Maintenance-Free Operation: The integral seals retain the factory-applied high-performance grease, which is suitable for a wide temperature range (-30°C to 110°C), making the bearing lubricated for life in many applications.
S7215 CDGA/HCP4A Bearing Typical Application Areas
This bearing is ideally suited for high-performance machinery where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling, semiconductor manufacturing equipment.
- High-Frequency Motors: Spindles for routers and high-speed electric motors.
- Medical & Laboratory Equipment: Centrifuges and other high-speed rotating devices.
