71805 CD/P4DBB
71800 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71805 CD/P4DBB Bearing Product Overview & Core Advantages
The 71805 CD/P4DBB is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Light / Class B specifications, delivering superior system stiffness and precise shaft positioning. Its compact design, featuring a 25 mm bore and 37 mm outside diameter, is ideal for high-speed spindles and other precision machinery where space is limited. The bearing is capable of supporting combined loads (radial and axial) simultaneously, making it a robust solution for complex loading conditions.
71805 CD/P4DBB Bearing Model Code Explained, Specifications & Naming Convention
The model number 71805 CD/P4DBB provides detailed technical specifications:
- 71805: Basic bearing designation (25mm bore, 37mm OD).
- C: 15° contact angle, optimized for high-speed performance and moderate axial load capacity.
- D: Indicates a duplex configuration (two bearings supplied as a set).
- P4: Denotes a high-precision tolerance class, ensuring minimal runout and superior rotational accuracy.
- DB: Specifies the Duplex Back-to-Back mounting arrangement, which provides high moment rigidity and excellent stability.
71805 CD/P4DBB Bearing Structural Features & Performance Benefits
The structural design of the 71805 CD/P4DBB delivers significant performance advantages:
- High Rigidity & System Stability: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and maintains precise shaft alignment under operational stresses.
- Optimized for High-Speed Operation: The 15° contact angle and phenolic resin cage reduce friction and centrifugal forces, enabling the bearing to achieve its high limiting speed of 103,000 rpm. This makes it an excellent choice for high-speed spindles.
- Superior Precision: Manufactured to P4 tolerance class, this bearing guarantees minimal dimensional variation and exceptional running accuracy, which is critical for applications like machine tools and precision instruments.
- Robust Load Capacity: With a dynamic load rating of 1521 lbf and a static load rating of 1440 lbf, it reliably handles significant combined radial and axial loads.
71805 CD/P4DBB Bearing Typical Application Areas
The 71805 CD/P4DBB is engineered for high-performance applications across various industries, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy positioning systems.
- Medical Equipment: Dental handpieces and small high-speed medical drills.
- Semiconductor Manufacturing: Wafer handling robots and precision stages.
- High-Frequency Motors and Spindles: Where compact size, high speed, and rigidity are paramount.
