71805 CD/P2DBB
71800 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71805 CD/P2DBB
Basic Information
System of measurement
Metric
Weight
0.042 kg
Tolerance class
P2
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.004mm to 0
Width
14 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1521 lbf
Radial static load rating
1440 lbf
Limiting speed
103 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
Light / Class B
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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71805 CD/P2DBB Bearing Product Overview & Core Advantages
The 71805 CD/P2DBB is a precision duplex pair of angular contact ball bearings designed for applications demanding exceptional rotational accuracy and rigidity. This metric system bearing is pre-configured in a Back-to-Back (DB) arrangement and comes with a Light preload (Class B), making it ideal for high-precision spindles and other machinery where minimal deflection under combined loads is critical. Its design excels at handling combined radial and axial loads simultaneously, offering a compact and highly reliable solution for demanding operational environments.
71805 CD/P2DBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71805 CD/P2DBB provides detailed technical specifications:
- 71805: The base designation for a single 25mm bore, 37mm OD angular contact ball bearing.
- C: Denotes a 15° contact angle, optimized for high-speed operation and moderate axial load capacity.
- D: Indicates the bearing is one of a Duplex pair.
- P2: Signifies a high-precision tolerance class, ensuring extremely tight dimensional and running accuracy.
- DB: Specifies the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity and excellent stability.
71805 CD/P2DBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The Back-to-Back (DB) duplex arrangement creates a wide, rigid support system that effectively resists moment loads and shaft misalignment, ensuring precise shaft positioning.
- Precision Performance: Manufactured to P2 tolerance class, this bearing guarantees minimal runout and vibration, which is essential for applications like machine tool spindles requiring high surface finish quality.
- Optimized Speed & Load Capacity: The 15° contact angle and phenolic resin cage contribute to low friction and high limiting speeds, while the design provides a robust dynamic and static load rating for its compact size.
- Ready-to-Install Solution: Supplied as a pre-matched and pre-loaded set, this eliminates complex assembly and adjustment procedures, reducing installation time and ensuring consistent, pre-defined performance.
71805 CD/P2DBB Bearing Typical Application Areas
This precision duplex bearing set is ideally suited for:
- High-Speed Machine Tool Spindles (e.g., for milling, grinding)
- Precision Gearboxes
- High-Frequency Motors
- Medical and Dental Equipment Spindles
- Robotic Arm Joints and Drives
