71919 ACDGA/HCP4AL
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71919 ACDGA/HCP4AL
Basic Information
System of measurement
Metric
Weight
0.5 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
95 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
130 mm
Outside diameter tolerance
-0.004mm to 0
Width
18 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
11.112 mm
Ball quantity
28
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
10395 lbf
Radial static load rating
11700 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
3
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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71919 ACDGA/HCP4AL Bearing Product Overview & Core Advantages
The 71919 ACDGA/HCP4AL is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. Engineered to accommodate combined loads (simultaneous radial and axial loads), this bearing features a 25° contact angle optimized for high axial load capacity. Its P4A tolerance class ensures ultra-precision operation, while the ceramic balls and phenolic cage contribute to superior high-speed capabilities and reduced weight. This configuration is ideal for machine tool spindles and other high-rigidity, high-rotation accuracy applications.
71919 ACDGA/HCP4AL Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle. |
| D | High Ball Complement design for increased load capacity. |
| GA | Universal Matchable (SU) bearing in a set of 3, preloaded to Extra light / Class A. |
| HC | Hybrid Ceramic balls (Silicon Nitride), offering higher speed, reduced weight, and longer service life. |
| P4A | Super-precision tolerance class with enhanced running accuracy for the most demanding applications. |
71919 ACDGA/HCP4AL Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: The single-row angular contact design, combined with the P4A tolerance class and tight dimensional tolerances on the bearing dimensions (bore, OD, and width), provides exceptional rotational accuracy and system stiffness.
- Superior Load Capacity: The 25° contact angle and high ball complement (28 balls) enable the bearing to handle significant combined loads, making it suitable for applications with high axial and radial force components.
- Exceptional High-Speed Performance: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage allows for a very high limiting speed of 16,000 rpm, minimizing heat generation and power loss.
- Pre-Lubricated and Open Design: The bearing comes lubricated for immediate use and features an open (non-shielded) seal type, which is optimal for systems with centralized lubrication or where maximum speed is the priority.
71919 ACDGA/HCP4AL Bearing Typical Application Areas
This high-performance precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and spindle drives requiring high accuracy and rigidity.
- High-Frequency Motors and Spindles: Where minimal runout and high rotational speeds are critical.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other precision instrumentation.
