71910 CDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 CDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3038 lbf
Radial static load rating
2340 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Light / Class B
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71910 CDGB/P4A Bearing Product Overview & Core Advantages
The 71910 CDGB/P4A is a super-precision angular contact ball bearing designed for applications demanding exceptional accuracy and high-speed performance. Manufactured to P4A tolerance class, this single bearing offers superior running accuracy and rotational stability. Its 15° contact angle and light preload (Class B) make it ideally suited for handling combined loads, providing high rigidity and precise shaft positioning in compact assemblies. As a Universal Matchable (SU) bearing, it can be paired with others to form precisely matched sets for optimal performance in preloaded arrangements.
71910 CDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 71910 CDGB/P4A is decoded as follows:
- 71910: Denotes the bearing series and size (10mm bore x 72mm OD x 12mm width).
- C: Signifies a 15° contact angle.
- D: Indicates the bearing is supplied with a light preload (Class B).
- GB: Specifies the use of a phenolic (resin) cage.
- P4A: Represents the tolerance class, indicating very high precision levels for both dimensional and running accuracy.
71910 CDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The angular contact design and P4A tolerance class ensure minimal runout and high system rigidity, which is critical for applications like machine tool spindles.
- Optimized for High Speeds: The lightweight phenolic cage (GB) reduces centrifugal forces, enabling a high limiting speed of 46,000 rpm. The 15° contact angle provides an excellent balance between radial and axial load capacity for high-speed operation.
- Superior Load Capacity: Engineered to support significant combined (radial and axial) loads, with a dynamic load rating of 3038 lbf and a static load rating of 2340 lbf.
- Universal Matching Capability (SU): This feature allows multiple 71910 CDGB/P4A bearings to be universally matched, simplifying the assembly of preloaded duplex sets and ensuring consistent, high-performance operation.
71910 CDGB/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally employed in:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Rotary Systems
- High-Frequency Motors and Spindles
- Medical and Dental Equipment
- Aerospace Instrumentation
