7204 CD/P4ATBTA
7200 & 7300 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7204 CD/P4ATBTA
Basic Information
System of measurement
Metric
Weight
0.31 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
20 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
47 mm
Outside diameter tolerance
-0.004mm to 0
Width
42 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
7.938 mm
Ball quantity
11
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
5850 lbf
Radial static load rating
3960 lbf
Limiting speed
100.5 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Extra light / Class A
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
In Stock
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7204 CD/P4ATBTA Bearing Product Overview & Core Advantages
The 7204 CD/P4ATBTA is a metric precision angular contact ball bearing supplied in a triplex back-to-back (TBT) matched set. This configuration delivers exceptional system rigidity and is optimized for applications requiring the highest levels of running accuracy and stability under combined loads. With a P4A tolerance class and an extra light preload (Class A), it is engineered for high-speed operation and precise positioning in demanding machinery.
Model Code Breakdown
| Code Segment | Technical Meaning |
|---|---|
| 7204 | Basic bearing series and size designation (20mm bore, 47mm OD). |
| CD | Specifies a 15° contact angle and optimized internal geometry for high-speed performance. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| TBT | Denotes the bearing is part of a Triplex Back-to-Back matched set of three bearings. |
| A | Signifies the specific preload level within the matched set, in this case, Extra Light (Class A). |
7204 CD/P4ATBTA Bearing Structural Features & Performance Benefits
- Superior Rigidity & Load Capacity: The triplex back-to-back arrangement creates an extremely rigid bearing system capable of supporting high combined radial and axial loads from both directions. This is critical for applications where shaft deflection must be minimized.
- High-Speed Capability: The 15° contact angle and phenolic resin cage are designed for low friction and high limiting speeds (up to 100,500 rpm), making it ideal for spindle applications.
- Precision Performance: Manufactured to P4A tolerance standards with tight dimensional control on bore, outside diameter, and width, this bearing ensures excellent running accuracy and reduced system vibration.
- Optimized Material Selection: Components made from chrome steel provide high hardness and durability, while the phenolic cage offers strength and smooth operation at high speeds.
7204 CD/P4ATBTA Bearing Typical Application Areas
This high-precision, high-speed bearing set is typically specified in advanced machinery where utmost accuracy and rigidity are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Where minimal runout and thermal stability are critical.
- High-Frequency Motors: Used in spindles for PCB drilling and other high-RPM applications.
- Medical and Dental Equipment: Such as high-speed handpieces and laboratory centrifuges.
- Aerospace Instrumentation: In gyroscopes and other precision navigation systems.
