7004 CD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7004 CD/P4ATBTC
Basic Information
System of measurement
Metric
Weight
0.2 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
42 mm
Outside diameter tolerance
-0.004mm to 0
Width
36 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
4185 lbf
Radial static load rating
2902 lbf
Limiting speed
63 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
Moderate / Class C
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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7004 CD/P4ATBTC Bearing Product Overview & Core Advantages
The 7004 CD/P4ATBTC is a metric precision angular contact ball bearing specifically designed for demanding applications requiring exceptional rotational accuracy and rigidity. This triplex back-to-back matched set delivers superior performance in handling combined loads, offering high axial and radial load capacity simultaneously. Manufactured to P4A tolerance class with a moderate preload (Class C), it ensures smooth operation, minimal runout, and enhanced system stability, making it ideal for high-precision, high-rigidity machinery.
7004 CD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning | Significance |
|---|---|---|
| 7004 | Basic Bearing Series & Size | Indicates a 20mm bore, 42mm OD, 36mm width bearing. |
| CD | Contact Angle (15°) & High Rigidity Design | Optimized for applications requiring high stiffness and precise axial positioning. |
| P4A | Tolerance Class (P4A) | Denotes very high precision levels for bore, outer diameter, and width tolerances. |
| TBT | Triplex Back-to-Back Arrangement | A set of three bearings mounted back-to-back to withstand moment loads and provide maximum system rigidity. |
| C | Moderate Preload (Class C) | Pre-applied internal load to eliminate axial play, enhancing bearing stiffness and rotational accuracy. |
7004 CD/P4ATBTC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The triplex back-to-back (TBT) arrangement creates an extremely rigid bearing system capable of handling heavy combined radial and axial loads as well as significant moment loads. The 15° contact angle is optimized for high axial load support.
- High-Precision Performance: Manufactured to P4A tolerance class with tight dimensional control on bore, outer diameter, and width, ensuring minimal runout and superior running accuracy for precision applications.
- Optimized High-Speed Operation: The lightweight phenolic resin cage reduces centrifugal forces, contributing to stable operation at the high limiting speed of 63,000 rpm. The bearings are pre-lubricated for immediate use.
- Robust Material Construction: Made from high-grade chrome steel for both rings and balls, providing excellent durability, wear resistance, and a long operational life under demanding conditions.
7004 CD/P4ATBTC Bearing Typical Application Areas
This bearing is engineered for high-performance applications where precision, speed, and rigidity are critical. 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: PCB drilling spindles and dental handpieces.
- Advanced Medical Equipment: CT scanner gantries and surgical tool rotors.
- Aerospace Actuation Systems: Flight control mechanisms and auxiliary power units.
