7209 CD/HCP4A
Hybrid Ceramic Super Precision Bearings
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Part No.
Part No.
7209 CD/HCP4A
Basic Information
System of measurement
Metric
Weight
0.34 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
45 mm
Bore diameter tolerance
-0.006mm to 0
Outside diameter
85 mm
Outside diameter tolerance
-0.008mm 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° to 110 °C
Radial dynamic load rating
9518 lbf
Radial static load rating
6975 lbf
Limiting speed
32 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Ceramic
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 306.23
/ each
In Stock
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7209 CD/HCP4A Bearing Product Overview & Core Advantages
The 7209 CD/HCP4A is a high-precision angular contact ball bearing engineered for demanding applications requiring exceptional rotational accuracy and rigidity. This single-row bearing is distinguished by its ceramic balls and P4 (ABEC-7) tolerance class, ensuring superior performance in high-speed and high-stress environments. Its design is optimized to handle significant combined loads (radial and axial) simultaneously, making it an ideal choice for machine tool spindles and other precision machinery where reliability and long service life are critical.
7209 CD/HCP4A Bearing Model Code Explained, Specifications & Naming Convention
The model number 7209 CD/HCP4A provides detailed technical specifications:
- 7209: Basic designation indicating a medium series bearing with 45mm bore and 85mm outside diameter.
- C: Denotes a 15° contact angle, optimized for high-speed operation and high axial load capacity.
- D: Indicates the bearing is supplied with a specific preload for enhanced rigidity and precise rotational accuracy.
- HC: Signifies the use of Hybrid Ceramic components, specifically ceramic balls running in steel rings.
- P4: Identifies the tolerance class equivalent to ABEC-7, indicating ultra-precise manufacturing tolerances for minimal runout and vibration.
- A: Specifies a modified internal design and optimized internal clearance for the applied preload.
7209 CD/HCP4A Bearing Structural Features & Performance Benefits
- Hybrid Ceramic Construction: The combination of ceramic balls and chrome steel rings significantly reduces friction, heat generation, and wear. This allows for higher limiting speeds (32,000 rpm) and extended service life, even under poor lubrication conditions.
- Superior Rigidity and Precision: The P4 precision grade and applied preload ensure minimal deflection under load, providing exceptional running accuracy and system stability, which is vital for high-speed machining and precision applications.
- High-Speed Capability: The 15° contact angle and lightweight phenolic resin cage are engineered for high-speed operation, reducing centrifugal forces and maintaining stability at the limiting speed.
- Optimized Load Capacity: Designed to handle significant dynamic and static loads (9518 lbf dynamic / 6975 lbf static), this bearing reliably supports combined radial and axial loads in high-performance systems.
7209 CD/HCP4A Bearing Typical Application Areas
This precision bearing is ideally suited for applications where speed, accuracy, and reliability are non-negotiable. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Arm joints and high-accuracy rotary axes.
- High-Frequency Motors and Spindles: Used in PCB drilling and dental handpieces.
- Aerospace and Defense Systems: Gyroscopes, radar systems, and other critical rotating assemblies.
- Medical Equipment: CT scanners and high-speed centrifuges.
