7210 ACDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7210 ACDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.39 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
50 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
90 mm
Outside diameter tolerance
-0.004mm to 0
Width
20 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
15
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
7312 lbf
Limiting speed
46 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
Price:
$ 109.83
/ each
In Stock
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7210 ACDGA/HCP4A Bearing Product Overview & Core Advantages
The 7210 ACDGA/HCP4A is a single-row angular contact ball bearing engineered for high-precision applications requiring exceptional speed and rigidity. Designed to accommodate combined loads (radial and axial loads in one direction), this bearing features a 25° contact angle for optimal axial load capacity. Its construction with ceramic balls and Phenolic cage enables superior high-speed performance and reduced rotational mass. Manufactured to P4A tolerance class, it delivers extreme dimensional accuracy and running precision, making it ideal for machine tool spindles and other demanding equipment.
7210 ACDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7210 | Basic bearing series, 50 mm bore, 90 mm OD, 20 mm width |
| AC | Angular Contact design |
| DGA | Specific internal design and contact angle (25°) |
| HC | Hybrid Ceramic balls (Ceramic balls with steel rings) |
| P4A | High-Precision Tolerance Class (exceeds ABEC 7) |
7210 ACDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces friction, heat generation, and wear. This enables higher limiting speeds (46,000 rpm) and extended service life, particularly in high-speed applications.
- Phenolic Resin Cage: This lightweight, high-strength cage provides excellent guidance for the ceramic balls, contributing to smooth operation, lower vibration, and superior performance at ultra-high speeds.
- High Rigidity & Load Capacity: The 25° contact angle and robust internal geometry provide high rigidity and the ability to handle significant combined loads (Radial Dynamic: 9518 lbf, Static: 7312 lbf).
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional controls (bore/OD tolerance: -0.004mm to 0), ensuring minimal runout and superior rotational accuracy for critical spindle applications.
- Universal Matching (SU): The bearing is universally matchable, allowing for precise preload control when mounted in pairs or sets (typically in sets of 3), simplifying installation and optimizing system stiffness.
7210 ACDGA/HCP4A Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers
- Precision Robotics: High-accuracy robotic arms and joints
- High-Speed Motors & Spindles: Electric motors, CNC router spindles
- Aerospace & Defense Systems: Gyroscopes, navigation systems
- Medical Equipment: High-speed dental handpieces, laboratory centrifuges
