71805 ACD/P4
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71805 ACD/P4
Basic Information
System of measurement
Metric
Weight
0.021 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
25 mm
Bore diameter tolerance
-0.005mm to 0
Outside diameter
37 mm
Outside diameter tolerance
-0.006mm to 0
Width
7 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.175 mm
Ball quantity
20
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
878 lbf
Radial static load rating
686 lbf
Limiting speed
53 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:
$ 255.56
/ each
In Stock
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71805 ACD/P4 Bearing Product Overview & Core Advantages
The 71805 ACD/P4 is a single-row angular contact ball bearing designed for applications demanding high precision and high-speed operation. Engineered to a P4 (ABEC-7) tolerance class, it offers exceptional dimensional accuracy and running precision. Its key advantage lies in its ability to accommodate combined loads, efficiently supporting significant axial loads in one direction alongside radial loads. The 25° contact angle optimizes this axial load capacity. Preloaded and pre-lubricated, this bearing is ready for installation, providing high rigidity and immediate performance in compact assemblies.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71805 | Basic bearing series and size designation (25mm bore, 37mm OD). |
| AC | Angular Contact design with a 25° contact angle. |
| D | Signifies a high rigidity design and that the bearing is supplied preloaded. |
| P4 | Indicates a high-precision tolerance class (equivalent to ABEC-7). |
71805 ACD/P4 Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance with a preload, this bearing minimizes axial and radial play, ensuring high system stiffness, accurate rotational accuracy, and reduced noise and vibration.
- Superior Load Capacity: The 25° contact angle and optimized internal geometry enable the bearing to handle significant combined radial and axial loads simultaneously.
- High-Speed Capability: The lightweight phenolic resin cage ensures excellent stability and guidance, contributing to a high limiting speed of 53,000 rpm. The open design facilitates efficient lubrication management.
- Durability and Reliability: Constructed from chrome steel for both rings and balls, the bearing offers high wear resistance and long service life under demanding operating conditions.
71805 ACD/P4 Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles
- High-Frequency Electric Spindles
- Precision Grinding Equipment
- High-Speed Pumps and Compressors
- Robotic Arm Joints and Drives
