71907 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71907 CD/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
15 °
Ball & Washer Dimensions
Ball diameter
5.556 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
2194 lbf
Radial static load rating
1474 lbf
Limiting speed
45 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:
$ 278.96
/ each
In Stock
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71907 CD/HCP4A Bearing Product Overview & Core Advantages
The 71907 CD/HCP4A is a single-row angular contact ball bearing engineered for applications demanding high precision and high-speed operation. Its defining characteristic is the 15° contact angle, which is optimized to support significant axial loads in one direction while also accommodating radial loads. Manufactured to a P4 (ABEC-7) tolerance class, it guarantees exceptional running accuracy. The combination of a ceramic ball and phenolic cage contributes to lower rotating mass, reduced friction, and superior performance at the limiting speed of 45,000 rpm. This bearing is preloaded, ensuring high system rigidity and precise rotational positioning from the moment of installation.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71907 | Basic bearing designation, indicating a metric, single-row angular contact ball bearing with a 35mm bore. |
| CD | Signifies a 15° contact angle and a specific internal design optimized for high rigidity and precise operation. |
| HC | Indicates the use of Hybrid Ceramic balls (Silicon Nitride), offering advantages in speed, temperature resistance, and service life. |
| P4 | Denotes the tolerance class equivalent to ABEC-7, ensuring extremely high dimensional and running accuracy. |
| A | Specifies that the bearing is supplied with a preload for immediate high rigidity and minimal axial/radial play. |
71907 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls significantly reduces centrifugal forces, lowers operating temperature, and extends bearing life, especially in high-speed applications.
- Phenolic Resin Cage: The lightweight and robust phenolic cage provides excellent dimensional stability and low friction at high rotational speeds, contributing directly to the high limiting speed.
- High-Precision Design (P4): Manufactured to ultra-precise P4 tolerance, this bearing minimizes vibration and noise, ensuring smooth and accurate rotation critical for precision machinery.
- Optimized Contact Angle: The 15° contact angle provides an ideal balance, offering high axial load capacity in one direction while maintaining good radial load performance.
- Preloaded for Immediate Rigidity: The bearing is supplied with a preload, eliminating internal clearance and providing maximum system rigidity and positional accuracy without requiring additional adjustment during installation.
71907 CD/HCP4A Bearing Typical Application Areas
This high-precision, high-speed angular contact ball bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles: For high-speed milling, grinding, and drilling centers requiring exceptional accuracy and rigidity.
- Precision Spindles: In PCB drilling, semiconductor manufacturing, and other high-precision automated equipment.
- High-Frequency Motors: Used in spindle motors and other applications where rotational speed and low vibration are critical.
- Medical and Laboratory Equipment: In centrifuges and other devices that demand high rotational speeds and reliability.
- Aerospace and Defense Systems: For gyroscopes, radar systems, and other instrumentation requiring high precision and performance.
