71918 ACDGB/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71918 ACDGB/P4A
Basic Information
System of measurement
Metric
Weight
0.55 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
26
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9945 lbf
Radial static load rating
10800 lbf
Limiting speed
15 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
No drawings available at the moment, will be launched soon
Price:
$ 215.84
/ each
In Stock
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71918 ACDGB/P4A Bearing Product Overview & Core Advantages
The 71918 ACDGB/P4A is a high-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Engineered to simultaneously withstand combined radial and axial loads, this bearing features a 25° contact angle and a Light preload (Class B), making it ideal for high-speed spindles and other precision machinery where minimal deflection and high operational stability are critical. Its P4A tolerance class ensures superior running accuracy, while its compact cross-section provides a space-saving solution without compromising performance.
71918 ACDGB/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | Optimized internal design for high stiffness and load capacity. |
| GB | Universal Matchable (SU) bearing, designed to be paired in sets for preloaded arrangements. |
| P4A | High precision tolerance class, guaranteeing extremely tight dimensional and running accuracy. |
71918 ACDGB/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The angular contact design and robust construction enable the bearing to handle significant combined loads. The light preload eliminates internal clearance, enhancing system stiffness and positioning accuracy.
- Superior High-Speed Performance: The phenolic resin cage is lightweight and possesses excellent sliding properties, contributing to lower friction and stable operation at the high limiting speed of 15,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance standards, this bearing ensures minimal runout and vibration, which is crucial for applications requiring high rotational accuracy.
- Universal Matching Capability: As a Universal Matchable (SU) bearing, the 71918 ACDGB/P4A can be supplied in matched sets (typically 3 bearings) to achieve a defined preload, simplifying installation and ensuring optimal performance in the application.
71918 ACDGB/P4A Bearing Typical Application Areas
This precision bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- Aerospace Control Systems
- Medical and Dental Equipment
