7030 CD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 CD/P4ATBTC
Basic Information
System of measurement
Metric
Weight
12.5 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
150 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
225 mm
Outside diameter tolerance
-0.004mm to 0
Width
105 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
83475 lbf
Radial static load rating
128250 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Triplex Back-to-Back (TBT)
Number of bearings in matched set
3
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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In Stock
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7030 CD/P4ATBTC Bearing Product Overview & Core Advantages
The 7030 CD/P4ATBTC is a premium triplex matched angular contact ball bearing designed for applications demanding exceptional precision and rigidity. This P4A tolerance class bearing set, arranged in a Back-to-Back (TBT) configuration, is engineered to handle significant combined loads (radial and axial) simultaneously. Its moderate preload (Class C) ensures high system stiffness and precise rotational accuracy, making it ideal for high-performance machinery where stability under load is critical. The open design and phenolic cage contribute to its suitability for high-speed operation.
7030 CD/P4ATBTC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a matched bearing set with specific internal clearance and preload. |
| P4A | Denotes an ultra-high precision tolerance class, exceeding ABEC 7/ISO P4 standards, for exceptional running accuracy. |
| TBT | Specifies the Triplex Back-to-Back arrangement of the three bearings in the set. |
7030 CD/P4ATBTC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The triplex back-to-back arrangement creates a highly rigid bearing system capable of withstanding heavy combined radial and axial loads from both directions. The 15° contact angle is optimized for axial load support.
- High-Speed Capability: The lightweight phenolic resin cage reduces centrifugal forces, enabling stable operation at the high limiting speed of 11,000 rpm. The open design facilitates efficient lubrication and heat dissipation.
- Ultra-Precision Performance: Manufactured to P4A tolerance class with tight dimensional controls on the bore diameter, outside diameter, and width, this bearing ensures minimal runout and superior rotational accuracy for precision spindles.
- Robust Material Construction: Made from high-grade chrome steel for both rings and balls, the bearing offers high fatigue life and durability under demanding operating conditions.
7030 CD/P4ATBTC Bearing Typical Application Areas
This bearing is specifically engineered for high-end industrial applications requiring maximum precision and stiffness, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Grinding Spindles: Applications where extreme rotational accuracy is non-negotiable.
- High-Frequency Machining Centers: For operations that demand high rigidity and damping characteristics.
- Other Precision Rotary Equipment: Such as high-speed pumps and compressors in specialized industries.
