7004 ACD/P4ADBCGMM
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7004 ACD/P4ADBCGMM
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
25 °
Ball & Washer Dimensions
Ball diameter
6.35 mm
Ball quantity
12
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
3038 lbf
Radial static load rating
1834 lbf
Limiting speed
103 X 1000 rpm
Lubrication
Grease
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
No drawings available at the moment, will be launched soon
In Stock
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7004 ACD/P4ADBCGMM Bearing Product Overview & Core Advantages
The 7004 ACD/P4ADBCGMM is a precision angular contact ball bearing designed for demanding applications requiring exceptional rotational accuracy and rigidity. As part of a duplex back-to-back (DB) matched set, this bearing is engineered to handle combined radial and axial loads simultaneously. Its P4A tolerance class ensures superior dimensional and running accuracy, making it ideal for high-speed spindles and precision machinery where high rigidity and minimal runout are critical.
7004 ACD/P4ADBCGMM Bearing Model Code Explained, Specifications & Naming Convention
The model number 7004 ACD/P4ADBCGMM provides detailed technical specifications:
- 7004: Basic bearing series with 20mm bore, 42mm OD, 24mm width.
- A: 25° contact angle, optimized for high axial load capacity.
- C: Specifies a Moderate preload (Class C) for enhanced stiffness.
- D: Indicates the bearing is part of a Duplex (DB) matched pair.
- P4A: Denotes an ultra-precision tolerance class exceeding ABEC 7 standards.
- DB: Back-to-Back mounting arrangement, providing high moment rigidity.
- CG: Specifies a Phenolic resin cage, suitable for high-speed operation.
- MM: Indicates the bearing is pre-greased with a specific lubricant.
7004 ACD/P4ADBCGMM Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The duplex back-to-back (DB) arrangement creates a wide, rigid support system that effectively resists moment loads and provides exceptional stability under combined radial and axial loads.
- Precision Performance: Manufactured to P4A tolerance class with a 25° contact angle, this bearing delivers exceptional running accuracy, low noise, and minimal vibration for precision applications.
- High-Speed Capability: The lightweight phenolic resin cage (CG) reduces centrifugal forces, enabling stable operation at the high limiting speed of 103,000 rpm.
- Optimized for Performance: The moderate preload (Class C) eliminates internal clearance, ensuring precise shaft positioning and immediate response to load changes without requiring adjustment during installation.
7004 ACD/P4ADBCGMM Bearing Typical Application Areas
This high-precision duplex bearing is specifically engineered for applications requiring maximum rigidity and accuracy, including:
- Machine Tool Spindles (high-speed milling, grinding, and turning centers)
- Precision Grinding Spindles
- High-Frequency Motor Spindles
- Industrial Pumps and Compressors
- Robotic Arm Joints and Precision Positioning Systems
