S71912 ACB/P4ADT
Sealed Super Precision Angular Contact Ball Bearings
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Basic Information
Main Dimensions
Ball & Washer Dimensions
Performance
Materials
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S71912 ACB/P4ADT Bearing Product Overview & Core Advantages
The S71912 ACB/P4ADT is a precision duplex tandem angular contact ball bearing designed for applications requiring exceptional rigidity and accuracy. This matched pair bearing features a 25° contact angle and is preloaded, enabling it to handle significant combined loads (radial and axial) simultaneously. Manufactured to P4A tolerance class, it delivers superior running accuracy and rotational precision, making it ideal for high-speed spindles and other demanding machinery where high rigidity and reliability are paramount.
S71912 ACB/P4ADT Bearing Model Code Explained, Specifications & Naming Convention
- S7: High-precision bearing series
- 1912: Standard size designation (60mm bore, 85mm OD, 26mm width)
- AC: Angular Contact design with a 25° contact angle
- B: 40° contact angle specification (Note: This appears to conflict with the provided 25° specification. Please verify actual product documentation)
- P4A: High precision tolerance class exceeding ABEC 7 standards
- DT: Duplex Tandem arrangement for increased axial load capacity in one direction
S71912 ACB/P4ADT Bearing Structural Features & Performance Benefits
High Rigidity & Load Capacity: The duplex tandem arrangement of two bearings provides exceptional stiffness, enabling precise positioning under heavy combined loads. The 25° contact angle optimizes axial load carrying capability while maintaining good radial load performance.
Precision Performance: Manufactured to P4A tolerance class with tight dimensional tolerances on bore, outside diameter, and width, ensuring minimal runout and vibration for smooth operation in precision applications.
High-Speed Capability: The phenolic resin cage offers excellent strength-to-weight ratio and operates effectively at the limiting speed of 36,000 rpm, making it suitable for high-speed spindle applications.
Sealed & Lubricated Design: Factory-sealed construction with grease lubrication provides long-term protection against contamination and ensures consistent performance across the operating temperature range of -30°C to 110°C.
S71912 ACB/P4ADT Bearing Typical Application Areas
The S71912 ACB/P4ADT is specifically engineered for high-performance applications including:
- Machine Tool Spindles - High-speed milling, grinding, and turning centers
- Precision Rotary Tables - Indexing and positioning systems
- High-Speed Motors - Spindle motors and high-frequency applications
- Medical Equipment - Dental handpieces and surgical tools
- Aerospace Components - Guidance systems and auxiliary power units
