7022 ACD/HCP4ADBC
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7022 ACD/HCP4ADBC
Basic Information
System of measurement
Metric
Weight
3.27 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
110 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
170 mm
Outside diameter tolerance
-0.004mm to 0
Width
56 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
19.05 mm
Ball quantity
20
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
37800 lbf
Radial static load rating
46800 lbf
Limiting speed
10 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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7022 ACD/HCP4ADBC Bearing Product Overview & Core Advantages
The 7022 ACD/HCP4ADBC is a duplex back-to-back (DB) angular contact ball bearing engineered for applications demanding exceptional precision and rigidity. This precision bearing is designed to accommodate combined loads—significant radial loads and axial loads in both directions—simultaneously. Its ceramic ball construction and P4A super-precision tolerance class make it ideal for high-speed, high-rigidity applications. The pre-lubricated and moderate preload (Class C) configuration ensures immediate operational readiness and consistent performance, eliminating the need for initial setup and reducing vibration in critical machinery.
7022 ACD/HCP4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7022 | Basic bearing series, defining the bearing dimensions: 110 mm bore, 170 mm OD, 56 mm width. |
| A | Contact angle of 25°, optimized for supporting high axial loads. |
| C | Specifies a Moderate Preload (Class C) for enhanced rigidity and reduced deflection. |
| D | Indicates a Duplex Back-to-Back (DB) arrangement. |
| HC | Refers to the Hybrid Ceramic construction (steel rings with ceramic balls). |
| P4A | Denotes a super-precision tolerance class, exceeding ABEC 7 standards for minimal runout. |
| DB | Reiterates the Duplex Back-to-Back matched set arrangement. |
| C | Reiterates the Moderate Preload (Class C). |
7022 ACD/HCP4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid, moment-resisting bearing system, significantly increasing operational stability and resistance to tilting moments under combined loads.
- Superior High-Speed Performance: The combination of lightweight phenolic resin cage and low-density ceramic balls (Si3N4) reduces centrifugal forces, enabling higher limiting speeds (up to 10,000 rpm) with less friction and heat generation.
- Enhanced Load Capacity: The 25° contact angle and robust bearing dimensions provide excellent radial dynamic load rating (37,800 lbf) and static load rating (46,800 lbf), making it suitable for demanding applications.
- Precision & Longevity: Manufactured to P4A tolerance class with a moderate preload, this bearing ensures minimal vibration, high running accuracy, and extended service life in precision machinery.
- Wide Temperature Suitability: The hybrid ceramic design and specified lubrication allow for a reliable operating temperature range from -30°C to 110°C.
7022 ACD/HCP4ADBC Bearing Typical Application Areas
This bearing is specifically designed for high-performance applications where precision, speed, and rigidity are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and rotary actuators requiring high positional accuracy.
- Aerospace & Defense Systems: Gyroscopes, radar platforms, and auxiliary power units.
- High-Frequency Motors and Spindles: Used in PCB drilling and semiconductor manufacturing equipment.
