S7209 CDGA/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
S7209 CDGA/HCP4A
Basic Information
System of measurement
Metric
Weight
0.35 kg
Tolerance class
P4A
Seal type
Sealed
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.004mm to 0
Width
19 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
12.7 mm
Ball quantity
14
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
6975 lbf
Limiting speed
46 X 1000 rpm
Lubrication
Grease
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
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In Stock
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S7209 CDGA/HCP4A Bearing Product Overview & Core Advantages
The S7209 CDGA/HCP4A is a high-precision angular contact ball bearing designed for demanding applications requiring exceptional speed and rigidity. As a universal matchable single bearing with an extra light preload (Class A), it delivers optimized performance in high-speed spindle arrangements. Its ceramic balls and P4A super-precision tolerance ensure minimal vibration and heat generation, making it ideal for applications where high rotational accuracy and extended service life are critical. This bearing is engineered to handle combined radial and axial loads efficiently.
S7209 CDGA/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning | Performance Benefit |
|---|---|---|
| CDGA | 15° contact angle, universal matchable design | Enables precise bearing arrangement in pairs for optimal load distribution and stiffness. |
| HCP4A | Hybrid Ceramic (balls), P4A tolerance class | Delivers superior high-speed performance, reduced friction, and exceptional running accuracy. |
S7209 CDGA/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of chrome steel rings and ceramic balls (Si3N4) significantly reduces centrifugal forces, enabling higher limiting speeds (46,000 rpm) and providing non-conductive characteristics.
- Phenolic Resin Cage: This lightweight cage material offers excellent dimensional stability at high speeds and contributes to smooth operation with minimal friction.
- Super-Precision P4A Tolerance: Extremely tight dimensional and running accuracy tolerances ensure superior rotational precision, reduced vibration, and enhanced system rigidity.
- Sealed & Grease-Lubricated Design: The integrated seals retain grease and protect against contamination, providing a maintenance-free solution within the specified temperature range (-30°C to 110°C).
- High Load Capacity: With a dynamic load rating of 9518 lbf and static load rating of 6975 lbf, it reliably handles significant combined loads.
S7209 CDGA/HCP4A Bearing Typical Application Areas
- High-Speed Machine Tool Spindles
- Precision Grinding Machines
- High-Frequency Motors
- Semiconductor Manufacturing Equipment
- Aerospace & Defense Systems
- Medical & Dental Drill Handpieces
