71907 ACD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
71907 ACD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.068 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
5.556 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2077 lbf
Radial static load rating
1395 lbf
Limiting speed
43 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:
$ 279
/ each
In Stock
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71907 ACD/HCP4A Bearing Product Overview & Core Advantages
The 71907 ACD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed operation. Its defining feature is the 25° contact angle, optimized to support significant combined loads—handling both radial and axial forces simultaneously. Manufactured to P4 (ABEC-7) tolerance class, it ensures exceptional running accuracy. The combination of a ceramic ball and phenolic cage contributes to lower friction, higher limiting speeds, and extended service life, making it ideal for high-reliability, precision machinery.
71907 ACD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Benefit / Characteristic |
|---|---|---|
| ACD | 25° Contact Angle | Optimized for high axial load capacity and rigidity. |
| HC | Hybrid Ceramic (Ceramic Balls) | Reduced weight, lower friction, higher speed capability, and non-conductive properties. |
| P4A | P4 (ABEC-7) Tolerance Class | Guarantees ultra-high precision for applications requiring minimal runout and vibration. |
71907 ACD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 25° contact angle and robust chrome steel rings provide excellent resistance to deformation under combined radial and axial loads, ensuring stable performance in demanding conditions.
- Superior High-Speed Performance: The hybrid ceramic design (ceramic balls with steel rings) significantly reduces centrifugal forces and friction, enabling a high limiting speed of 43,000 rpm. The lightweight phenolic resin cage further enhances operational stability at high velocities.
- Precision & Accuracy: Manufactured to P4 tolerance with precise bore and outside diameter tolerances, this bearing delivers exceptional running accuracy, which is critical for spindle applications and other precision machinery.
- Preload Availability: The bearing is supplied with a preload, which eliminates internal clearance, increases system stiffness, and improves rotational accuracy for the final application.
71907 ACD/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact bearing is ideally suited for:
- Machine Tool Spindles (High-speed machining centers, grinding spindles)
- Precision Robotics and Automation Arms
- High-Frequency Motors and Spindle Drives
- Dental and Medical Handpieces
- Aerospace Instrumentation and Guidance Systems
