71907 ACB/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71907 ACB/HCP4A
Basic Information
System of measurement
Metric
Weight
0.074 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
35 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
55 mm
Outside diameter tolerance
-0.007mm to 0
Width
10 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
3.969 mm
Ball quantity
25
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
1098 lbf
Radial static load rating
776 lbf
Limiting speed
56 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 278.97
/ each
In Stock
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71907 ACB/HCP4A Bearing Product Overview & Core Advantages
The 71907 ACB/HCP4A is a single-row angular contact ball bearing engineered for applications demanding exceptional precision and high-speed performance. Its design is optimized to support combined loads, effectively managing both radial and significant axial loads in one direction. A key feature is its P4 (ABEC-7) tolerance class, ensuring ultra-precise running accuracy for critical machinery. The combination of a ceramic ball material and a phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it a superior choice for high-reliability applications where space is constrained.
71907 ACB/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 71907 | The basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 35 mm bore, 55 mm OD, and 10 mm width. |
| ACB | Signifies a specific internal design with a 25° contact angle and optimized internal geometry for high rigidity and load capacity. |
| HC | Indicates the use of Hybrid Ceramic balls, which are lighter and harder than steel, reducing centrifugal force and wear. |
| P4 | Denotes the tolerance class, equivalent to ABEC-7. This ensures extremely tight dimensional and running accuracy for precision applications. |
| A | Indicates that the bearing is supplied with a specific preload to enhance system rigidity and rotational accuracy. |
71907 ACB/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class, this bearing provides exceptional running accuracy and minimal vibration, which is critical for maintaining the precision of the host system.
- Superior High-Speed Performance: The hybrid ceramic balls and lightweight phenolic resin cage work in tandem to significantly reduce centrifugal forces and friction, enabling a high limiting speed of 56,000 rpm.
- Enhanced Load Capacity: The optimized 25° contact angle provides an excellent balance, allowing the bearing to handle substantial axial loads in addition to radial loads.
- Reduced Maintenance Needs: The bearing is pre-lubricated, and the open seal type allows for easy re-lubrication if required, supporting long-term performance within its specified temperature range of -30°C to 110°C.
71907 ACB/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles
- High-Frequency Machining Centers
- Precision Grinding Spindles
- High-Speed Robotics and Automation
- Aerospace Instrumentation
