71944 ACDGC/P4A
71900 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
71944 ACDGC/P4A
Basic Information
System of measurement
Metric
Weight
6.6 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
220 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
300 mm
Outside diameter tolerance
-0.004mm to 0
Width
38 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
25.4 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
46800 lbf
Radial static load rating
64125 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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71944 ACDGC/P4A Bearing Product Overview & Core Advantages
The 71944 ACDGC/P4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. Engineered to withstand combined radial and axial loads simultaneously, this bearing features a 25° contact angle and a Moderate (Class C) preload for enhanced system stiffness and precise shaft positioning. Manufactured to P4A tolerance class, it guarantees superior running accuracy, making it ideal for high-speed spindles and other precision machinery where minimal runout and vibration are critical.
71944 ACDGC/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71944 | Basic bearing series and size designation |
| AC | Angular Contact design |
| D | High contact angle (25°) |
| GC | Moderate preload (Class C) |
| P4A | High precision tolerance class (superior to ABEC 7) |
71944 ACDGC/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The angular contact design and Moderate preload provide excellent resistance to deflection under combined loads, ensuring stable operation and prolonged bearing life. With a dynamic load rating of 46,800 lbf and static load rating of 64,125 lbf, it handles significant operational stresses.
- Precision & High-Speed Performance: The Phenolic cage offers low friction and high-speed capability, contributing to a limiting speed of 11,000 rpm. The P4A tolerance class ensures minimal vibration and precise running accuracy for sensitive applications.
- Optimized Material & Construction: Manufactured from Chrome Steel for both rings and balls, providing high hardness and wear resistance. The open seal type allows for custom lubrication schemes to optimize performance for specific operating conditions.
- Universal Matching Capability: Designated as Universal Matchable (SU), this bearing can be supplied in matched sets of 3 for preconfigured preload and optimal performance in multi-bearing arrangements.
71944 ACDGC/P4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring extreme precision and rigidity.
- Precision Rotary Tables: Indexing and positioning systems in automated manufacturing.
- High-Frequency Motors & Spindles: Applications demanding minimal vibration at elevated rotational speeds.
- Medical Equipment: High-accuracy imaging systems and surgical tool drives.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and other critical rotational components.
