7205 CD/P4ADBC
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7205 CD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.26 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
52 mm
Outside diameter tolerance
-0.004mm to 0
Width
30 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
13
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4972 lbf
Radial static load rating
3285 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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
Price available upon request.
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7205 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7205 CD/P4ADBC is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is designed to simultaneously handle combined radial and axial loads. Its P4A super-precision tolerance and moderate preload (Class C) ensure smooth, high-speed operation with minimal runout, making it ideal for high-reliability, high-performance machinery.
7205 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
The model number 7205 CD/P4ADBC is decoded as follows:
- 7205: Basic series designation for a 25mm bore, 52mm OD angular contact ball bearing.
- C: Denotes a 15° contact angle, optimized for high-speed performance.
- D: Indicates the bearing is part of a duplex pair.
- P4A: Signifies a super-precision tolerance class, exceeding ABEC 7 standards for superior running accuracy.
- DB: Specifies the back-to-back duplex arrangement, which provides high moment rigidity and accommodates axial loads from both directions.
- C: Indicates a moderate preload (Class C) for enhanced stiffness and precise shaft positioning.
7205 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) configuration creates a wide, rigid support system that effectively resists moment loads and maintains shaft alignment under demanding conditions.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to support significant combined radial and axial loads.
- High-Speed Capability: The lightweight phenolic resin cage ensures excellent stability and low friction at the limiting speed of 100,500 rpm, reducing centrifugal forces and heat generation.
- Precision Performance: Manufactured to P4A tolerance class with a moderate preload, this bearing delivers exceptional running accuracy, low vibration, and minimal thermal growth for critical applications.
- Durable Construction: Components made from chrome steel provide high hardness, wear resistance, and long service life.
7205 CD/P4ADBC Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Spindles for PCB drilling and routing
- Precision Gearboxes and transmission systems
- Robotic Arm Joints and precision automation equipment
- Medical Equipment such as high-speed dental handpieces and imaging scanners
- Aerospace Actuation Systems and instrumentation
