71910 ACD/P4ATGB
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71910 ACD/P4ATGB
Basic Information
System of measurement
Metric
Weight
0.39 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
36 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
25
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
6210 lbf
Radial static load rating
6750 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
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
No drawings available at the moment, will be launched soon
In Stock
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71910 ACD/P4ATGB Bearing Product Overview & Core Advantages
The 71910 ACD/P4ATGB 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 group of three, it enables simplified assembly of preloaded duplex or triplex arrangements. Its light preload (Class B) and P4A tolerance class ensure minimal runout and high system rigidity, making it ideal for high-precision spindles and other critical machinery where combined loads must be managed with utmost reliability.
71910 ACD/P4ATGB Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Basic bearing series and size designation (50mm bore, 72mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a universally matchable (SU) bearing for duplex/triplex mounting. |
| P4A | High precision tolerance class, exceeding ABEC-7/ISO P4 standards. |
| TGB | Indicates the bearing is lubricated with a specific high-performance grease. |
71910 ACD/P4ATGB Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and universal matchable design allow for the creation of preloaded sets that provide high axial and radial stiffness, effectively handling combined loads.
- High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, contributing to a high limiting speed of 46,000 rpm. The optimized internal geometry further enhances high-speed stability.
- Precision & Accuracy: Manufactured to a P4A tolerance class with tight dimensional controls on the bearing dimensions (bore, OD, width), this bearing ensures minimal vibration and precise shaft positioning.
- Ready-to-Install: The bearings are pre-lubricated and supplied as a matched set of 3, simplifying installation and ensuring consistent preload and performance in the final application.
71910 ACD/P4ATGB Bearing Typical Application Areas
This bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Instrumentation: Measuring devices and optical scanners.
- High-Frequency Motors & Spindles: Where high rotational accuracy and speed are critical.
- Medical Equipment: Dental handpieces and small precision drives.
