71924 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
71924 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.99 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
120 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
165 mm
Outside diameter tolerance
-0.01mm to 0
Width
22 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
14.288 mm
Ball quantity
28
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
17550 lbf
Radial static load rating
20588 lbf
Limiting speed
14 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:
$ 1648.82
/ each
In Stock
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71924 CD/HCP4A Bearing Product Overview & Core Advantages
The 71924 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. As a single-row bearing, it is optimized to support high combined loads, handling significant radial loads alongside thrust loads in one direction. Its standout features include a ceramic ball and phenolic cage construction, which contribute to superior high-speed performance, reduced weight, and extended service life. With a P4 (ABEC-7) tolerance class and available preload, this bearing is designed for high reliability in precision machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 71924 | Basic bearing series and size designation (120mm bore, 165mm OD, 22mm width). |
| CD | Indicates a 15° contact angle and a specific internal design optimized for high stiffness and speed. |
| HC | Signifies the use of Hybrid Ceramic balls (steel rings with ceramic balls). |
| P4 | Denotes a high-precision tolerance class (equivalent to ABEC-7), ensuring minimal runout and vibration. |
| A | Indicates that the bearing is supplied with a specific preload for optimal rigidity and rotational accuracy. |
71924 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 enables higher limiting speeds (14,000 rpm). This construction also provides superior resistance to wear and electrical arcing.
- Phenolic Resin Cage: The lightweight phenolic cage offers excellent dimensional stability and low friction at high speeds, contributing to smooth operation and reduced vibration.
- High Rigidity & Preload: The 15° contact angle and available preload ensure high system stiffness, minimizing deflection under load for superior positional accuracy.
- Superior Load Capacity: Engineered to handle high radial dynamic load ratings (17,550 lbf) and static load ratings (20,588 lbf), making it suitable for combined loads.
- Precision Engineering: Manufactured to P4 tolerance standards, this bearing guarantees exceptional running accuracy, which is critical for high-speed spindles and precision instruments.
71924 CD/HCP4A Bearing Typical Application Areas
This high-performance angular contact ball bearing is ideally suited for applications where precision, speed, and reliability are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC lathes.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- Aerospace & Defense: Gyroscopes, radar systems, and auxiliary power units (APUs).
- Medical Equipment: High-speed dental handpieces and imaging scanner rotors.
- High-Frequency Motors and Spindles: Where low inertia and high rotational accuracy are required.
