71944 ACDGA/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Main Dimensions
Ball & Washer Dimensions
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Materials
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71944 ACDGA/P4A Bearing Product Overview & Core Advantages
The 71944 ACDGA/P4A is a single-row angular contact ball bearing engineered for ultra-high precision applications requiring exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running accuracy and dimensional stability. Its 25° contact angle is optimized to handle significant combined loads (radial and axial) simultaneously, while the Universal Matchable (SU) design allows for precise preload configuration when mounted in sets. The phenolic cage and premium lubrication ensure reliable performance in demanding high-speed environments.
71944 ACDGA/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing designation (44mm bore, specific series) |
| AC | Angular Contact design |
| D | High ball complement design |
| GA | Universal matching bearing with specific preload |
| P4A | Ultra-precision tolerance class exceeding ABEC 7 |
71944 ACDGA/P4A Bearing Structural Features & Performance Benefits
High Precision Construction: Manufactured to P4A tolerance class with bore and outside diameter tolerances of -0.004mm to 0, ensuring exceptional dimensional accuracy and runout control for precision applications.
Optimized Load Capacity: The 25° contact angle and high ball complement (29 balls of 25.4mm diameter) provide excellent combined load handling capability, with dynamic load rating of 46,800 lbf and static load rating of 64,125 lbf.
High-Speed Performance: The phenolic cage offers superior strength-to-weight ratio and smooth operation at limiting speeds up to 11,000 rpm, reducing centrifugal forces and maintaining stability.
Universal Matching Capability: Designed as Universal Matchable (SU) bearings, they can be supplied in sets of 3 with controlled preload for optimal stiffness and minimal deflection in multi-bearing arrangements.
Premium Material Selection: Chrome steel rings and balls combined with factory lubrication provide consistent performance across the operating temperature range of -30°C to 110°C.
71944 ACDGA/P4A Bearing Typical Application Areas
- Machine Tool Spindles - High-precision machining centers and grinding spindles
- Precision Gearboxes - Industrial transmission systems requiring minimal deflection
- Aerospace Systems - Flight control mechanisms and auxiliary power units
- Medical Equipment - High-speed dental handpieces and surgical tools
- Robotics & Automation - Precision joints and positioning systems
- Test & Measurement Equipment - Coordinate measuring machines and optical instruments
