7030 ACD/P4ATBTB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 ACD/P4ATBTB
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
25 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
78975 lbf
Radial static load rating
121500 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
Light / Class B
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 ACD/P4ATBTB Bearing Product Overview & Core Advantages
The 7030 ACD/P4ATBTB is a high-precision, triplex matched angular contact ball bearing set designed for demanding applications requiring exceptional rigidity and accuracy. This metric system bearing features a Light (Class B) preload and a Back-to-Back (TBT) arrangement, enabling it to withstand significant combined loads (radial and axial) from both directions. Its P4A tolerance class and matched set of three bearings ensure superior running accuracy, making it ideal for high-speed, high-rigidity spindles and precision machinery where minimal deflection is critical.
7030 ACD/P4ATBTB Bearing Model Code Explained, Specifications & Naming Convention
The model number 7030 ACD/P4ATBTB is decoded as follows:
- 7030: Basic bearing series, indicating a 150 mm bore, 225 mm outside diameter.
- ACD: Angular Contact design with a 25° contact angle.
- P4A: Indicates a high-precision tolerance class exceeding ABEC 7 (ISO Class 4) standards, ensuring extremely tight dimensional and running accuracy.
- TBT: Denotes the Triplex Back-to-Back matched set arrangement. This configuration provides maximum rigidity against moment loads.
- B (in preload context): Specifies a Light preload (Class B), which minimizes runout and improves positional accuracy without generating excessive heat.
7030 ACD/P4ATBTB Bearing Structural Features & Performance Benefits
- Exceptional Rigidity and Load Capacity: The triplex back-to-back (TBT) arrangement of three bearings creates an extremely stiff bearing system capable of handling high combined radial and thrust loads. The 25° contact angle is optimized for supporting substantial axial loads.
- High-Speed Capability: The phenolic cage is lightweight and robust, contributing to lower centrifugal forces and smoother operation at the limiting speed of 11,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision Performance: Manufactured to P4A tolerance class with a Light preload, this set guarantees minimal runout, high rotational accuracy, and reduced vibration, which is essential for precision machining and finishing.
- Robust Construction: Components made from chrome steel (rings and balls) provide high fatigue life and durability, with a dynamic load rating of 78,975 lbf and a static load rating of 121,500 lbf.
7030 ACD/P4ATBTB Bearing Typical Application Areas
This bearing set is engineered for high-performance applications in:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers where precision and rigidity are paramount.
- Precision Grinding Spindles: Applications requiring ultra-fine surface finishes and tight tolerances.
- High-Frequency Machining Centers: For operations that demand high rotational speeds and minimal thermal growth.
- Industrial Pumps and Compressors: In models that utilize precision angular contact bearings for shaft support.
