7028 CD/P4ADGA
7000 Series Super Precision Angular Contact Ball Bearings
Image may differ from product. See technical specification for details.
Part No.
Part No.
7028 CD/P4ADGA
Basic Information
System of measurement
Metric
Weight
6.84 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
140 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
210 mm
Outside diameter tolerance
-0.004mm to 0
Width
66 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
55575 lbf
Radial static load rating
75375 lbf
Limiting speed
6.3 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Universal Matchable (SU)
Number of bearings in matched set
2
Universal matching bearing
Universal Matchable (SU)
Preload
Extra light / Class A
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:
$ 1588.37
/ each
In Stock
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7028 CD/P4ADGA Bearing Product Overview & Core Advantages
The 7028 CD/P4ADGA is a precision angular contact ball bearing designed for applications demanding exceptional rotational accuracy and rigidity. Manufactured to P4A tolerance class, this bearing delivers superior running precision. Its universal matchable (SU) design allows for flexible mounting arrangements in pairs to support combined loads. The bearing is pre-lubricated and features an open design optimized for high-speed operation, making it an ideal solution for high-precision spindles and other critical machinery.
7028 CD/P4ADGA Bearing Model Code Explained, Specifications & Naming Convention
The model number 7028 CD/P4ADGA deciphers as follows:
- 7028: Basic series designation, indicating a 140mm bore, 210mm OD, and 66mm width.
- C: Represents a 15° contact angle, optimized for high-speed applications.
- D: Indicates the internal design is optimized for high rigidity and load capacity.
- P4A: Denotes a super-precision tolerance class with restricted width tolerance.
- DGA: Specifies a universal matchable (SU) bearing designed to be paired in a duplex set.
7028 CD/P4ADGA Bearing Structural Features & Performance Benefits
- High Rigidity & Load Capacity: The optimized internal geometry and 15° contact angle enable the bearing to handle significant combined radial and axial loads. The phenolic cage ensures stable operation under high centrifugal forces.
- Super-Precision Performance: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on bore, outside diameter, and width, resulting in minimal runout and vibration for superior application performance.
- High-Speed Capability: The lightweight phenolic cage and optimized internal design contribute to a high limiting speed of 6,300 rpm, making it suitable for demanding spindle applications.
- Universal Matching: The SU designation means these bearings are universally matchable and can be arranged in back-to-back (DB), face-to-face (DF), or tandem (DT) configurations without selective assembly, simplifying installation and inventory.
7028 CD/P4ADGA Bearing Typical Application Areas
This precision angular contact ball bearing is engineered for high-performance applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: Applications in PCB drilling, high-frequency motors, and dental handpieces.
- Industrial Pumps & Compressors: Where high speed and accuracy are critical.
- Robotics and Aerospace components requiring high rigidity and precision.
