7021 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7021 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
1.32 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
105 mm
Bore diameter tolerance
-0.008mm to 0
Outside diameter
160 mm
Outside diameter tolerance
-0.01mm to 0
Width
26 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
17.462 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
21510 lbf
Radial static load rating
21712 lbf
Limiting speed
15 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:
$ 1274.73
/ each
In Stock
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7021 CD/HCP4A Bearing Product Overview & Core Advantages
The 7021 CD/HCP4A is a high-precision angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. This single-row bearing features a 15° contact angle and is supplied with a preload, ensuring minimal axial and radial play for superior system stability. Its construction with ceramic balls and a phenolic cage enables outstanding high-speed performance and reduced rotating mass. Designed to handle combined loads, it is an ideal solution for high-rigidity, high-reliability spindles and precision machinery.
7021 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a duplex bearing set with a specific preload and contact angle combination (15° in this case). |
| HCP4A | Denotes a P4 (ABEC-7) tolerance class and signifies the use of hybrid ceramic balls for enhanced speed and performance. |
7021 CD/HCP4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The preloaded configuration and P4 tolerance class provide exceptional running accuracy and stiffness, critical for minimizing deflection under load.
- Superior High-Speed Capability: The combination of ceramic balls (lower density, reduced centrifugal force) and a lightweight phenolic cage significantly increases the limiting speed and reduces operational temperature.
- Optimized Load Capacity: The 15° contact angle is optimized to efficiently support combined radial and axial loads simultaneously.
- Enhanced Durability: Hybrid construction with ceramic balls and steel rings offers improved resistance to wear and a longer service life, especially in demanding environments.
7021 CD/HCP4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications, including:
- Machine Tool Spindles (High-speed milling, grinding)
- Precision Spindles for PCB drilling and routing
- High-Frequency Motors
- Medical Equipment (e.g., Dental handpieces)
- Aerospace Actuation Systems
