7001 CD/PA9A
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7001 CD/PA9A
Basic Information
System of measurement
Metric
Weight
0.021 kg
Tolerance class
PA9A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
12 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
28 mm
Outside diameter tolerance
-0.004mm to 0
Width
8 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
4.762 mm
Ball quantity
10
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
1010 lbf
Radial static load rating
428 lbf
Limiting speed
100 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Single
Number of bearings in matched set
2
Universal matching bearing
No (Standard)
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
In Stock
Price available upon request.
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7001 CD/PA9A Bearing Product Overview & Core Advantages
The 7001 CD/PA9A is a precision angular contact ball bearing designed for applications demanding exceptional accuracy and rigidity. This single-row bearing is supplied as a universally matched pair (set of 2), enabling it to accommodate combined radial and axial loads simultaneously. Manufactured to an ultra-precise PA9A tolerance class and featuring a phenolic resin cage, it delivers superior high-speed performance, operational stability, and is pre-lubricated for immediate use in high-reliability systems.
7001 CD/PA9A Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a universal matched pair. Two bearings are manufactured to specific tolerances that allow them to be mounted in a back-to-back (DB), face-to-face (DF), or tandem (DT) arrangement without additional selection, providing optimal preload and stiffness. |
| PA9A | Specifies the tolerance class. This denotes extremely tight dimensional and running accuracy tolerances (superior to ABEC 7/ISO P4), ensuring minimal runout and vibration for high-precision applications. |
7001 CD/PA9A Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The 15° contact angle is optimized to support significant axial loads in one direction while also handling radial loads. When used as a preloaded matched pair (CD), the system achieves very high rigidity, critical for minimizing shaft deflection under complex combined loads.
- Superior High-Speed Performance: The lightweight and robust phenolic resin cage ensures smooth operation and guidance of the balls at high rotational speeds, contributing to the high limiting speed of 100,000 rpm.
- Precision Engineering: The PA9A tolerance class guarantees tight control over bore diameter, outside diameter, and width, resulting in predictable performance, precise fits, and low noise and vibration levels.
- Ready-to-Install: The bearing is pre-lubricated, simplifying installation and providing immediate protection upon startup within its specified temperature range of -30°C to 110°C.
7001 CD/PA9A Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision and speed are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and drilling spindles requiring extreme accuracy and rigidity.
- Precision Drives: In servo motors, high-frequency spindles, and other precision power transmission systems.
- Aerospace & Defense Systems: Gyroscopes, navigation instruments, and other critical control mechanisms.
- Medical Equipment: High-speed dental handpieces and laboratory instrumentation.
