S71907 CB/P4ADBA
Sealed Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
S71907 CB/P4ADBA
Basic Information
System of measurement
Metric
Weight
0.16 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
55 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
3.969 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1872 lbf
Radial static load rating
1654 lbf
Limiting speed
56 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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S71907 CB/P4ADBA Bearing Product Overview & Core Advantages
The S71907 CB/P4ADBA is a precision double row angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. Engineered with a duplex back-to-back (DB) arrangement and an extra light preload (Class A), this bearing is optimized to handle combined radial and axial loads simultaneously. Its sealed construction, phenolic cage, and P4A tolerance class make it an ideal solution for high-speed, high-reliability machinery requiring minimal maintenance and long service life.
S71907 CB/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
The model number S71907 CB/P4ADBA provides detailed technical specifications:
- S7: High-precision bearing series.
- 1907: Standard size designation (35mm bore, 55mm OD, 20mm width).
- CB: Denotes a duplex back-to-back (DB) arrangement with a specific internal clearance and preload.
- P4A: Indicates a super-precision tolerance class, exceeding ABEC 7 standards for exceptional running accuracy.
- DB: Confirms the duplex back-to-back mounting configuration.
- A: Specifies an extra light preload for optimal rigidity and high-speed performance.
S71907 CB/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement provides a wide effective spread of load-bearing points, significantly increasing system rigidity and moment load capacity for superior operational stability.
- Combined Load Capacity: The 15° contact angle and double row design are engineered to support substantial combined radial and axial loads in both directions.
- High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, while the grease lubrication and precision construction contribute to a high limiting speed of 56,000 rpm.
- Sealed & Pre-Lubricated: The sealed design retains lubricant and effectively excludes contaminants, offering a maintenance-free, long-lasting solution within the specified temperature range of -30°C to 110°C.
S71907 CB/P4ADBA Bearing Typical Application Areas
This bearing is ideally suited for high-precision, high-speed applications, including:
- Machine Tool Spindles
- High-Frequency Electric Spindles
- Precision Grinding Equipment
- Medical and Dental Handpieces
- Aerospace Instrumentation
