71918 ACE/P4A
71900 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71918 ACE/P4A
Basic Information
System of measurement
Metric
Weight
0.54 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
90 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
125 mm
Outside diameter tolerance
-0.009mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
24
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
6435 lbf
Radial static load rating
5130 lbf
Limiting speed
20 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
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:
$ 1090.11
/ each
In Stock
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71918 ACE/P4A Bearing Product Overview & Core Advantages
The 71918 ACE/P4A is a single-row angular contact ball bearing designed for applications demanding high precision and high-speed performance. Engineered to a P4 (ABEC-7) tolerance class, it is preloaded and pre-lubricated, enabling it to handle significant combined loads (radial and axial) simultaneously. Its compact design, featuring a 90 mm bore and 18 mm width, provides a high load capacity in a minimal envelope, making it ideal for high-rigidity, high-reliability installations.
71918 ACE/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Significance & Benefit |
|---|---|---|
| ACE | 25° Contact Angle, High Precision | Optimized for carrying high axial loads and providing high rigidity. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees extremely tight dimensional and running accuracy for superior performance in precision applications. |
71918 ACE/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Load Capacity: The 25° contact angle and robust construction, including chrome steel rings and balls, enable the bearing to support substantial combined loads with high system rigidity.
- High-Speed Capability: The lightweight and durable phenolic resin cage ensures stable operation and reduced centrifugal forces, contributing to the high limiting speed of 20,000 rpm.
- Precision Performance: Manufactured to P4 tolerance and supplied with preload, this bearing offers minimal runout and precise rotational accuracy, essential for high-speed spindles.
- Optimized for Performance: The bearing comes pre-lubricated and is designed to operate effectively within a temperature range of -30°C to 110°C.
71918 ACE/P4A Bearing Typical Application Areas
This precision angular contact bearing is ideally suited for demanding applications such as:
- Machine Tool Spindles
- High-Frequency Motors
- Precision Grinding Spindles
- High-Speed Pumps and Compressors
- Aerospace Control Systems
