S7215 ACD/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S7215 ACD/P4ADBA
Basic Information
System of measurement
Metric
Weight
2.46 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
50 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
15.875 mm
Ball quantity
17
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
24975 lbf
Radial static load rating
26550 lbf
Limiting speed
28 X 1000 rpm
Lubrication
Grease
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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S7215 ACD/P4ADBA Bearing Product Overview & Core Advantages
The S7215 ACD/P4ADBA is a precision duplex angular contact ball bearing designed for demanding applications requiring high rigidity and exceptional running accuracy. This matched set in a Back-to-Back (DB) arrangement is preloaded to Extra Light (Class A) specifications, ensuring optimal stiffness and minimal axial/radial runout. Its primary advantage lies in its ability to handle combined loads (significant radial and bidirectional axial loads) simultaneously, making it an ideal choice for high-precision, high-reliability spindles and machinery where rotational accuracy is paramount.
S7215 ACD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Advantage |
|---|---|---|
| ACD | Angular Contact, Duplex Back-to-Back arrangement | Provides high moment rigidity and excellent stability. |
| P4A | High precision tolerance class (superior to ABEC 7) | Ensures extremely low noise, smooth operation, and superior running accuracy. |
| DB | Duplex Back-to-Back (implied in ACD) | Optimized to withstand overturning moments and combined loads. |
S7215 ACD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Preload: The duplex back-to-back design with a defined Extra Light preload (Class A) eliminates internal clearance, resulting in a very stiff bearing system that resists deflection under load, crucial for maintaining precision.
- Superior Load Capacity: With a 25° contact angle and a robust design, this bearing excels at handling combined radial and axial loads from both directions, a characteristic of angular contact ball bearings.
- High-Speed Capability: The lightweight and durable phenolic resin cage minimizes centrifugal forces and ensures stable operation, contributing to the high limiting speed of 28,000 rpm. The standard grease lubrication is formulated for this performance envelope.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, guaranteeing consistent, high-precision performance and interchangeability.
S7215 ACD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for applications where maximum rigidity and running accuracy are required. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: PCB drilling machines, precision grinding equipment.
- High-Frequency Motors: Spindles for CNC machinery.
- Robotics: High-accuracy rotary joints and arms.
