71910 ACBGA/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71910 ACBGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.13 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
72 mm
Outside diameter tolerance
-0.004mm to 0
Width
12 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
29
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1638 lbf
Radial static load rating
1350 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
4
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
Our sales team will respond within 24 hours with a competitive quote tailored to your requirements.
REQUEST A QUOTE
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
71910 ACBGA/HCP4A Bearing Product Overview & Core Advantages
The 71910 ACBGA/HCP4A is a single-row angular contact ball bearing engineered for ultra-high precision and performance. Positioned for applications demanding exceptional rotational accuracy and rigidity, this bearing features a 25° contact angle and is supplied as part of a universally matchable set of four bearings. Its core advantages include the ability to accommodate combined radial and axial loads simultaneously, a ceramic ball construction for reduced weight and thermal expansion, and a P4A tolerance class for superior running accuracy, making it ideal for high-speed, high-reliability spindles and precision machinery.
71910 ACBGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71910 | Standard bearing series and size designation. |
| AC | Angular Contact design. |
| B | 40° contact angle (superseded by the specified 25° in this product's data). |
| GA | Indicates special internal clearance and preload for universal matching. |
| HC | Hybrid Ceramic, signifying the use of ceramic balls. |
| P4A | The tolerance class, denoting very high precision for dimensional and running accuracy. |
71910 ACBGA/HCP4A Bearing Structural Features & Performance Benefits
- High-Speed Capability & Rigidity: The combination of a phenolic resin cage and ceramic balls significantly reduces centrifugal forces and weight, enabling a high limiting speed of 46,000 rpm. The angular contact design provides excellent axial and radial rigidity.
- Superior Precision & Load Capacity: Manufactured to a P4A tolerance class, this bearing ensures minimal runout and vibration. It is rated for a dynamic load of 1638 lbf and a static load of 1350 lbf, reliably handling combined loads.
- Thermal Stability & Longevity: Ceramic balls exhibit lower thermal expansion compared to steel, maintaining preload and accuracy over a wide temperature range (-30°C to 110°C). The phenolic cage offers good dimensional stability and corrosion resistance.
- Matched Set Configuration: Supplied as a universally matchable set of four bearings, allowing for flexible arrangement in duplex pairs (DB, DF, DT) to achieve the required preload and stiffness for the application.
71910 ACBGA/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Spindles in PCB drilling and routing
- High-Frequency Motors
- Aerospace & Defense Instrumentation
- Medical Equipment (e.g., high-speed dental handpieces)
