S71904 ACD/P4ADGA
Sealed 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
- Free shipping on orders over $200
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
S71904 ACD/P4ADGA Bearing Product Overview & Core Advantages
The S71904 ACD/P4ADGA is a super-precision angular contact ball bearing designed for the most demanding applications. This double row configuration provides exceptional stiffness and the ability to support combined loads (radial and bidirectional axial loads) simultaneously. Manufactured to a P4A tolerance class and featuring a universal matchable (SU) design, it delivers superior running accuracy and reliability in compact assemblies. The phenolic cage and pre-lubrication with grease further enhance its performance for high-speed operation and long service life.
S71904 ACD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series
- 1904: Dimension series; 19 (width series) & 04 (bore diameter code for 20mm)
- ACD: Contact angle of 25° and double row design
- P4A: Tolerance class P4A (superior geometric and running accuracy)
- DGA: Designates specific internal features and grease lubrication
S71904 ACD/P4ADGA Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The double row ball complement and 25° contact angle create an extremely rigid structure capable of handling significant combined loads from multiple directions, making it ideal for applications requiring precise shaft positioning.
Super-Precision & High-Speed Performance: Built to P4A tolerance class standards, this bearing ensures minimal runout and vibration. The lightweight phenolic cage is optimized for high-speed operation, contributing to a limiting speed of 100,000 rpm, while the pre-applied grease reduces friction and heat generation.
Universal Matchability & Sealed Design: The Universal Matchable (SU) designation allows two bearings to be mounted in a tandem arrangement to increase load capacity without the need for selective mounting. The sealed construction protects against contamination and retains lubrication, ensuring consistent performance and extended service intervals.
S71904 ACD/P4ADGA Bearing Typical Application Areas
This super-precision angular contact ball bearing is ideally suited for high-performance machinery where accuracy, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Robotic Drives
- Medical and Dental Equipment Spindles
