7220 CD/HCP4ADGD
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7220 CD/HCP4ADGD
Basic Information
System of measurement
Metric
Weight
5.27 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
68 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
57375 lbf
Radial static load rating
60750 lbf
Limiting speed
16 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Heavy / Class D
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
Price available upon request.
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7220 CD/HCP4ADGD Bearing Product Overview & Core Advantages
The 7220 CD/HCP4ADGD is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rigidity and accuracy. This universal matchable (SU) bearing features a heavy preload (Class D) and ceramic ball construction, delivering superior performance in high-speed and high-rigidity scenarios. Its design is optimized to handle combined loads efficiently, making it an ideal solution for precision machinery where reliability and dimensional stability are paramount.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7220 | Basic bearing series, 100 mm bore, 180 mm OD |
| CD | 15° contact angle and specific internal design |
| HC | Hybrid Ceramic construction (ceramic balls with steel rings) |
| P4A | High-precision tolerance class (exceeds ABEC 7) |
| DGD | Universal Matchable (SU) arrangement, supplied as a matched set of 2 bearings |
7220 CD/HCP4ADGD Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The heavy preload (Class D) and optimized internal geometry provide exceptional stiffness, enabling the bearing to withstand significant combined radial and axial loads while maintaining precise shaft positioning.
- Enhanced High-Speed Performance: The combination of ceramic balls (silicon nitride) and a phenolic resin cage reduces centrifugal forces and friction, allowing operation at limiting speeds up to 16,000 rpm. The lower density of ceramic balls decreases rolling element mass, critical for high-speed applications.
- Superior Precision & Stability: Manufactured to P4A tolerance class with tight dimensional control on bore, outside diameter, and width. This ensures minimal runout and superior rotational accuracy for precision spindles.
- Universal Matching Capability (SU): Bearings are supplied as a universally matchable set, allowing flexible mounting arrangements (DB, DF, DT) without pre-selection, simplifying installation and inventory management.
7220 CD/HCP4ADGD Bearing Typical Application Areas
This precision bearing is ideally suited for:
- Machine Tool Spindles: High-speed machining centers, grinding spindles, and CNC milling machines
- Precision Industrial Pumps: Chemical process pumps, high-pressure hydraulic pumps
- High-Speed Compressors: Turbo compressors, air spindle compressors
- Advanced Robotics: Robot arm joints, precision positioning systems
- Aerospace & Defense Systems: Gyroscopes, radar systems, and navigation equipment
