7004 CD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7004 CD/P4ADBC
Basic Information
System of measurement
Metric
Weight
0.14 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
24 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
3150 lbf
Radial static load rating
1912 lbf
Limiting speed
121 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7004 CD/P4ADBC Bearing Product Overview & Core Advantages
The 7004 CD/P4ADBC is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. This duplex back-to-back (DB) matched set is preloaded to Moderate / Class C standards, delivering superior system stiffness and precise shaft positioning. Its primary advantage lies in its ability to handle combined loads (radial and axial) simultaneously while maintaining high performance in high-speed operations, making it ideal for high-precision machinery where reliability is critical.
7004 CD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7004 | Basic bearing designation indicating a 20mm bore, 42mm OD, and 24mm width. |
| C | Specifies a 15° contact angle, optimized for high axial load capacity. |
| D | Indicates a Duplex Back-to-Back (DB) arrangement in a matched set. |
| P4A | Denotes a high-precision tolerance class (superior to ABEC 7), ensuring minimal runout and vibration. |
| DBC | Confirms the Moderate / Class C preload applied to the matched set for optimal rigidity. |
7004 CD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and maintains precise shaft alignment under combined loads.
- Superior Load Capacity: The 15° contact angle design provides excellent capability to handle significant axial loads in both directions, in addition to radial loads.
- High-Speed Performance: The phenolic cage offers excellent strength-to-weight ratio, reduced friction, and superior guidance at high speeds up to 121,000 rpm.
- Precision Operation: Manufactured to P4A tolerance class with tight dimensional controls, ensuring minimal vibration and exceptional running accuracy for precision applications.
- Optimized Material Selection: Constructed from chrome steel for both rings and balls, providing high hardness, wear resistance, and long service life.
7004 CD/P4ADBC Bearing Typical Application Areas
- Machine Tool Spindles for CNC machining centers and grinding machines
- High-Speed Spindles in precision manufacturing equipment
- Industrial Pumps and compressors requiring precise shaft positioning
- Precision Instrumentation and measuring devices
- Robotic Arm Joints and automation equipment
- Medical Equipment spindles and rotary components
