7030 ACD/P4ATBTC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 ACD/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
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
Moderate / Class C
Materials
Ring material
Chrome Steel
Ball material
Chrome Steel
Cage material
Phenolic
Technical Drawings
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7030 ACD/P4ATBTC Bearing Product Overview & Core Advantages
The 7030 ACD/P4ATBTC is a precision angular contact ball bearing configured as a triplex back-to-back (TBT) matched set. Engineered for applications demanding exceptional rigidity and accuracy, this P4A tolerance class bearing is preloaded to deliver moderate preload (Class C), ensuring minimal axial and radial runout. Its design is optimized to handle combined loads—significant radial loads alongside thrust loads in both directions—making it an ideal solution for high-precision, high-rigidity spindles and rotating systems where positional accuracy is critical.
Model Code Deep Explanation
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle |
| P4A | High precision tolerance class exceeding ABEC 7/ISO P4, with enhanced running accuracy requirements |
| TBT | Triplex Back-to-Back arrangement of three bearings as a matched set |
7030 ACD/P4ATBTC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity & Stability: The triplex back-to-back (TBT) arrangement creates a highly rigid bearing system that effectively resists moment loads and maintains shaft positioning under heavy combined loads.
- High Load Capacity: With a dynamic load rating of 78,975 lbf and static load rating of 121,500 lbf, this bearing set delivers reliable performance in demanding applications. The 25° contact angle optimizes thrust load capacity.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional control (bore and OD tolerance: -0.004mm to 0), ensuring smooth operation and minimal vibration for high-precision applications.
- Optimized High-Speed Capability: The phenolic cage provides excellent strength-to-weight ratio, contributing to stable operation at the limiting speed of 11,000 rpm. The bearing comes pre-lubricated for immediate operation.
- Premium Material Construction: Manufactured from chrome steel for both rings and balls, ensuring durability and long service life in industrial environments within the temperature range of -30°C to 110°C.
7030 ACD/P4ATBTC Bearing Typical Application Areas
- Machine Tool Spindles: High-speed milling, grinding, and turning centers requiring high rigidity and precision
- Precision Rotary Tables: Indexing and positioning systems in manufacturing equipment
- High-Speed Machining Centers: Applications demanding combined load capacity and thermal stability
- Industrial Robotics: Precision joints and rotary actuators
- Specialized Medical Equipment: High-accuracy rotating components in medical devices
