71805 CD/P4DBAGMM2
71800 Series Super Precision Angular Contact Ball Bearings
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71805 CD/P4DBAGMM2 Bearing Product Overview & Core Advantages
The 71805 CD/P4DBAGMM2 is a precision angular contact ball bearing supplied as a matched duplex pair in a back-to-back (DB) arrangement. Engineered to P4 tolerance class, it delivers exceptional running accuracy and dimensional stability. Its core advantages include the ability to support combined loads (radial and axial) simultaneously, high operational precision due to its extra light preload, and excellent high-speed capabilities facilitated by its phenolic cage. This configuration is ideal for applications demanding high rigidity and precise rotational performance.
71805 CD/P4DBAGMM2 Bearing Model Code Explained, Specifications & Naming Convention
- 71805: Basic designation indicating a metric, angular contact ball bearing with a 25 mm bore and 37 mm outside diameter.
- CD: Indicates a duplex bearing set with a Back-to-Back (DB) arrangement, providing high moment rigidity.
- P4: Denotes a high-precision tolerance class for superior running accuracy.
- DB: Confirms the Back-to-Back mounting of the duplex pair.
- A: Specifies an Extra Light preload for minimal friction and optimal high-speed performance.
- GMM: Indicates the use of a phenolic resin cage, suitable for high speeds and offering good strength-to-weight ratio.
- 2: Specifies that the set consists of 2 matched bearings.
71805 CD/P4DBAGMM2 Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide effective spread, significantly increasing the bearing's resistance to moment loads and providing high system rigidity. The 15° contact angle is optimized to handle substantial combined radial and axial loads.
High-Speed Performance: The lightweight phenolic cage (GMM) reduces centrifugal forces, while the extra light preload (A) minimizes friction and heat generation. This combination enables the bearing to achieve a high limiting speed of 103,000 rpm, making it a true high-speed bearing.
Precision & Stability: Manufactured to P4 tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing ensures precise shaft positioning, low vibration, and consistent performance in demanding applications.
71805 CD/P4DBAGMM2 Bearing Typical Application Areas
This high-precision, high-speed bearing is typically employed in:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles
- High-Frequency Motors
- Industrial Pumps and Compressors
- Advanced Robotics and Automation Equipment
