71907 CD/P4ADGB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71907 CD/P4ADGB
Basic Information
System of measurement
Metric
Weight
0.15 kg
Tolerance class
P4A
Seal type
Open
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
5.556 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3578 lbf
Radial static load rating
2902 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
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
Price:
$ 171.72
/ each
In Stock
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71907 CD/P4ADGB Bearing Product Overview & Core Advantages
The 71907 CD/P4ADGB is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universally matchable (SU) bearing supplied in a pre-set pair, it is engineered to accommodate combined loads (radial and axial) simultaneously. Its P4A tolerance class ensures ultra-precision operation, making it ideal for high-reliability spindles and machinery. The light preload (Class B) minimizes deflection under operational stresses, enhancing system rigidity and positioning accuracy.
71907 CD/P4ADGB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71907 CD/P4ADGB is decoded as follows:
- 71907: Basic designation for a high-precision angular contact ball bearing series with a 35 mm bore, 55 mm OD, and 20 mm width.
- C: Signifies a 15° contact angle, optimized for high-speed applications requiring high rigidity.
- D: Indicates the bearing is supplied as a universally matchable (SU) pair, pre-configured to handle axial loads in both directions when mounted adjacently.
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7 standards, with strict controls on bore, outer diameter, and width runout.
- DGB: Specifies a light preload (Class B) applied to the matched set, reducing internal clearance for enhanced stiffness and reduced vibration.
71907 CD/P4ADGB Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The universal matchable (SU) pairing and light preload create a highly rigid bearing system that minimizes axial and radial play, crucial for high-precision machining and spindle applications.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry provide excellent performance under combined radial and axial loads.
- High-Speed Capability: The phenolic resin cage offers low weight and excellent performance at high rotational speeds, contributing to a limiting speed of 56,000 rpm. The standard lubrication is suitable for this demanding operational range.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls, this bearing ensures smooth, quiet, and accurate rotation, reducing vibration and heat generation.
71907 CD/P4ADGB Bearing Typical Application Areas
This bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles for CNC machining centers, grinders, and lathes
- High-Frequency Motors and Precision Spindles
- Industrial Pumps and Compressors
- Robotic Drives and Precision Instrumentation
