S7015 CD/HCP4ADGA
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7015 CD/HCP4ADGA
Basic Information
System of measurement
Metric
Weight
1.08 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
115 mm
Outside diameter tolerance
-0.004mm to 0
Width
40 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
19170 lbf
Radial static load rating
22050 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Universal Matchable (SU)
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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S7015 CD/HCP4ADGA Bearing Product Overview & Core Advantages
The S7015 CD/HCP4ADGA is a super-precision double row angular contact ball bearing engineered for the most demanding applications. Its core advantage lies in its ability to simultaneously support high combined loads—significant radial loads and bidirectional axial loads—with exceptional stability. Featuring a P4A tolerance class and a 15° contact angle, this bearing is designed for superior running accuracy, high rigidity, and smooth operation at very high speeds. The compact design, incorporating ceramic balls and a phenolic cage, makes it an ideal choice for high-precision, high-reliability spindles and machinery.
S7015 CD/HCP4ADGA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| S7015 | Super-precision angular contact ball bearing series with a 75mm bore. |
| CD | A 15° contact angle and a universal matchable (SU) design. Two bearings can be mounted in a back-to-back (DB) or face-to-face (DF) arrangement to optimize preload and stiffness. |
| HC | Hybrid Ceramic: Signifies the use of ceramic balls, which reduce centrifugal forces, lower operating temperature, and enable higher limiting speeds. |
| P4A | The tolerance class denoting extremely tight dimensional and running accuracy, superior to ABEC 7/ISO P4. |
| DGA | Sealed on both sides with non-contact labyrinth seals and pre-lubricated with a high-performance grease suitable for the specified temperature range. |
S7015 CD/HCP4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The double row design provides a significantly stiffer support system compared to single row bearings, effectively handling combined radial and axial loads from both directions. The extra light preload (Class A) ensures minimal deflection and precise shaft positioning under load.
- Superior High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic (silicon nitride) balls drastically reduces centrifugal forces and inertial mass. This allows the bearing to achieve a high limiting speed of 28,000 rpm with lower heat generation and improved dynamic stability.
- Enhanced Durability & Longevity: Hybrid ceramic construction offers excellent wear resistance and is electrically insulating, mitigating the risk of electrical erosion. The sealed design with pre-applied grease provides long-term, maintenance-free operation by effectively protecting against contamination.
- Precision Engineering: Manufactured to P4A tolerance class with a bore and outside diameter tolerance of -0.004mm to 0, guaranteeing exceptional running accuracy and consistent performance in precision assemblies.
S7015 CD/HCP4ADGA Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where precision, speed, and reliability are critical. Key industries and equipment include:
- Machine Tool Spindles: High-speed CNC milling, grinding, and turning centers.
- Precision Spindles: PCB drilling spindles, high-frequency motor spindles.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units.
- Medical Equipment: High-speed dental handpieces and laboratory centrifuges.
