7040 CD/P4A
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7040 CD/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
15 °
Ball & Washer Dimensions
Ball diameter
34.925 mm
Ball quantity
21
Performance
Temperature range
-30° to 110 °C
Radial dynamic load rating
66600 lbf
Radial static load rating
87750 lbf
Limiting speed
6.7 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:
$ 4378.82
/ each
In Stock
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7040 CD/P4A Bearing Product Overview & Core Advantages
The 7040 CD/P4A is a single-row angular contact ball bearing engineered for applications demanding exceptional rotational accuracy and rigidity. Positioned in the P4 (ABEC-7) tolerance class, this precision bearing is designed to handle high combined loads, primarily thrust loads in one direction, with a 15° contact angle that optimizes performance. Its phenolic resin cage and factory-applied lubrication contribute to its high-speed capabilities and reliable operation in a wide temperature range.
7040 CD/P4A Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7040 | Standard bore diameter (200 mm) and series designation. |
| CD | Indicates a specific contact angle (15°) and internal design optimized for high rigidity. |
| P4A | Denotes the tolerance class P4 (ABEC-7), ensuring extremely tight dimensional and running accuracy for precision applications. |
7040 CD/P4A Bearing Structural Features & Performance Benefits
- High Rigidity and Precision: Manufactured to P4 tolerance class standards, this bearing ensures minimal runout and vibration, which is critical for the stability of high-precision spindles.
- Optimized Load Capacity: The 15° contact angle and robust internal geometry enable it to support significant combined radial and axial loads, with a high dynamic load rating of 66,600 lbf.
- Superior High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the pre-lubrication allows for a high limiting speed of 6,700 rpm, making it an ideal high-speed bearing.
- Wide Operating Range: Constructed from chrome steel and compatible with a temperature range from -30°C to 110°C, it offers reliable performance in demanding environments.
7040 CD/P4A Bearing Typical Application Areas
This bearing is specifically designed for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles for milling, grinding, and turning centers
- High-frequency Precision Spindles
- High-Speed Pumps and Compressors
- Robotic and Automation Drives
- Precision Medical and Laboratory Equipment
