7040 ACD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7040 ACD/P4A
Basic Information
System of measurement
Metric
Weight
12.3 kg
Tolerance class
P4 (ABEC-7)
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
200 mm
Bore diameter tolerance
-0.012mm to 0
Outside diameter
310 mm
Outside diameter tolerance
-0.013mm to 0
Width
51 mm
Width tolerance
-0.3mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
34.925 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
63225 lbf
Radial static load rating
82125 lbf
Limiting speed
6 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Preload
Available
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
No drawings available at the moment, will be launched soon
Price:
$ 1430.23
/ each
In Stock
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7040 ACD/P4A Bearing Product Overview & Core Advantages
The 7040 ACD/P4A is a single-row angular contact ball bearing engineered for applications demanding high precision and superior performance. Designed to accommodate combined loads (simultaneous radial and axial loads), its primary advantage lies in its optimized contact angle of 25°, which provides excellent axial load capacity. Manufactured to a P4 (ABEC-7) tolerance class, this bearing ensures exceptional running accuracy and rotational stability. The availability of preload further enhances system rigidity, making it an ideal choice for high-speed, high-rigidity spindles and precision machinery.
7040 ACD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7040 | Standard bearing series designation, indicating the bore diameter (200 mm) and cross-section. |
| AC | Angular Contact design, optimized for combined loads. |
| D | Signifies a high contact angle of 25°, providing superior axial load capacity. |
| /P4A | Denotes a P4 (ABEC-7) tolerance class, indicating very high running accuracy and dimensional precision. |
7040 ACD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity & Precision: The combination of a 25° contact angle and availability of preload delivers high system stiffness, minimizing deflection under load and ensuring precise rotational performance.
- Superior Load Capacity: Engineered to handle significant combined radial and axial loads simultaneously, with a high dynamic load rating of 63,225 lbf and static load rating of 82,125 lbf.
- Optimized High-Speed Performance: The lightweight and robust phenolic resin cage ensures stable operation and low centrifugal forces, contributing to a high limiting speed of 6,000 rpm.
- Premium Material Construction: Components made from chrome steel for rings and balls offer high hardness, wear resistance, and long service life.
- Pre-lubricated & Wide Temperature Range: The bearing is lubricated and operates effectively within a temperature range of -30°C to 110°C.
7040 ACD/P4A Bearing Typical Application Areas
This precision angular contact ball bearing is ideally suited for demanding applications where high speed, rigidity, and accuracy are paramount. Key industries and equipment include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Robotics: Robotic arm joints and high-accuracy actuators.
- High-Frequency Motors and Spindles: Motors for CNC machinery and PCB drilling.
- Medical Equipment: High-speed centrifuges and dental handpieces.
- Aerospace & Defense Systems: Gyroscopes, radar systems, and guidance mechanisms.
