7220 CDGA/HCP4A

Hybrid Ceramic Super Precision Bearings

7220 CDGA/HCP4A Hybrid Ceramic Super Precision Bearings
7220 CDGA/HCP4A Hybrid Ceramic Super Precision Bearings

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Part No.
Part No. 7220 CDGA/HCP4A

Basic Information

System of measurement Metric
Weight 2.64 kg
Tolerance class P4A
Seal type Open
For load direction Angular Contact

Main Dimensions

Bore diameter 100 mm
Bore diameter tolerance -0.004mm to 0
Outside diameter 180 mm
Outside diameter tolerance -0.004mm to 0
Width 34 mm
Width tolerance -0.2mm to 0
Contact angle 15 °

Ball & Washer Dimensions

Ball diameter 25.4 mm
Ball quantity 15

Performance

Temperature range - 30°C to 110 °C
Radial dynamic load rating 35100 lbf
Radial static load rating 30825 lbf
Limiting speed 16.25 X 1000 rpm
Lubrication Lubricated
Matched arrangement Single
Number of bearings in matched set 3
Universal matching bearing Universal Matchable (SU)
Preload Extra light / Class A

Materials

Ring material Chrome Steel
Ball material Ceramic
Cage material Phenolic
Technical Drawings No drawings available at the moment, will be launched soon
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7220 CDGA/HCP4A Bearing Product Overview & Core Advantages

The 7220 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional accuracy and performance. As a single bearing with a 15° contact angle and Extra light preload (Class A), it delivers superior rotational accuracy and rigidity. Its construction with a phenolic cage and ceramic balls enables outstanding high-speed capabilities, with a limiting speed of 16,250 rpm. This bearing is Universal Matchable (SU), allowing for precise preload control when mounted in sets, making it ideal for high-precision spindles and other critical machinery.

7220 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention

Code Segment Technical Meaning
7220 Basic bearing designation (100mm bore, 180mm OD)
C 15° contact angle design
DG Universal matching bearing (can be mounted in any combination)
A Extra light preload (Class A)
HC Hybrid ceramic balls (silicon nitride)
P4A High precision tolerance class (superior to ABEC 7)

7220 CDGA/HCP4A Bearing Structural Features & Performance Benefits

Hybrid Ceramic Construction: The combination of chrome steel rings with ceramic balls significantly reduces centrifugal forces, enabling higher operating speeds while providing excellent wear resistance and electrical insulation properties.

Precision Phenolic Cage: The phenolic resin cage offers superior strength-to-weight ratio, reduced friction, and excellent performance at high speeds, contributing to the bearing's 16,250 rpm limiting speed.

Enhanced Rigidity & Accuracy: With P4A tolerance class and extra light preload, this bearing maintains precise shaft positioning and minimizes deflection under load, ensuring consistent performance in precision applications.

Superior Load Capacity: Rated for 35,100 lbf dynamic and 30,825 lbf static radial loads, the bearing handles combined loads effectively while maintaining high precision.

7220 CDGA/HCP4A Bearing Typical Application Areas

  • Machine Tool Spindles - High-speed milling, grinding, and turning centers
  • Precision Robotics - High-accuracy robotic arms and positioning systems
  • Aerospace Systems - Guidance systems and flight control mechanisms
  • Medical Equipment - Dental handpieces and surgical tools
  • High-Speed Motors - Spindle motors and high-RPM drive systems
  • Semiconductor Manufacturing - Wafer handling and processing equipment
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