71810 ACD/P4DGB
71800 Series Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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71810 ACD/P4DGB Bearing Product Overview & Core Advantages
The 71810 ACD/P4DGB is a super-precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and high-speed performance. As a universal matchable (SU) bearing supplied in a pre-loaded duplex set, it is engineered to accommodate combined loads—simultaneously handling significant radial and axial loads. Its P4 tolerance class ensures ultra-precise running accuracy, making it ideal for high-rigidity spindles and other precision machinery where minimal runout and high reliability are critical.
71810 ACD/P4DGB Bearing Model Code Explained, Specifications & Naming Convention
- 71810: Basic designation for a super-precision, light-weight series angular contact ball bearing with a 50mm bore.
- ACD: Signifies a 25° contact angle and a duplex arrangement with a universal match (face-to-face or back-to-back) and Light Preload (Class B).
- P4: Denotes an ultra-high precision tolerance class, superior to ABEC-7, ensuring extremely tight dimensional and running accuracy.
- DGB: Indicates the bearing is lubricated with a high-performance grease suitable for the specified operating range.
71810 ACD/P4DGB Bearing Structural Features & Performance Benefits
The performance of the 71810 ACD/P4DGB is derived from its meticulous design and material selection. The duplex set configuration provides high rigidity and stable rotational characteristics by pre-loading two bearings against each other. The 25° contact angle is optimized for supporting substantial axial loads in combination with radial loads. The phenolic resin cage offers excellent strength-to-weight ratio, contributing to smooth operation at the high limiting speed of 41,000 rpm. Manufactured from chrome steel for both rings and balls, and finished to P4 precision tolerances, this bearing delivers exceptional durability, low noise, and minimal heat generation under high-speed operation.
71810 ACD/P4DGB Bearing Typical Application Areas
This bearing is predominantly used in high-precision, high-speed machinery, including:
- Machine Tool Spindles (e.g., CNC milling, grinding, and turning centers)
- High-Frequency Motors and Spindle Drives
- Precision Robotics and Automation Equipment
- Medical Equipment (e.g., high-speed dental handpieces)
- Aerospace Instrumentation and Gyroscopes
