7030 ACD/P4AQBCC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 ACD/P4AQBCC
Basic Information
System of measurement
Metric
Weight
16.7 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
140 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
98100 lbf
Radial static load rating
162000 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Quadruplex Back-to-Back (QBC)
Number of bearings in matched set
4
Universal matching bearing
No (Standard)
Preload
Moderate / Class C
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
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7030 ACD/P4AQBCC Bearing Product Overview & Core Advantages
The 7030 ACD/P4AQBCC is a high-precision quadruplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched set of four bearings in a back-to-back (QBC) arrangement is preloaded to deliver moderate preload (Class C), ensuring superior system stiffness and minimal runout. Its primary advantage lies in its ability to handle combined loads—significant radial and thrust loads from both directions—simultaneously, making it an ideal choice for high-speed, high-rigidity spindles and precision machinery where positional accuracy is paramount.
7030 ACD/P4AQBCC Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7030 | Basic bearing designation indicating a 150 mm bore, 225 mm OD, and 140 mm width. |
| ACD | Angular Contact Design with a 25° contact angle for optimal thrust capacity. |
| P4A | Indicates a high-precision tolerance class (superior to ABEC 7), ensuring extremely tight dimensional and running accuracy. |
| QBCC | Specifies a Quadruplex Back-to-Back (QBC) matched set with Moderate (Class C) preload applied. This configuration provides maximum rigidity. |
7030 ACD/P4AQBCC Bearing Structural Features & Performance Benefits
- Exceptional Rigidity: The quadruplex back-to-back (QBC) arrangement and moderate preload create an extremely stiff bearing system, critical for minimizing deflection under heavy combined loads and ensuring machining accuracy.
- High Load Capacity: The 25° contact angle and robust construction, featuring chrome steel rings and balls, provide high dynamic and static load ratings (98,100 lbf / 162,000 lbf), enabling reliable performance under demanding conditions.
- Optimized High-Speed Performance: The lightweight phenolic cage reduces centrifugal forces, contributing to a high limiting speed of 11,000 rpm. The open seal type allows for efficient lubrication management in high-speed applications.
- Precision & Accuracy: Manufactured to P4A tolerance class with tight bore, OD, and width tolerances, this bearing guarantees precise shaft positioning and smooth, vibration-free operation.
7030 ACD/P4AQBCC Bearing Typical Application Areas
This bearing is engineered for high-performance machinery where precision, speed, and rigidity are non-negotiable. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Spindles: For PCB drilling, engraving, and other high-accuracy machining processes.
- High-Frequency Motors: Where precise rotor positioning is critical.
- Industrial Pumps & Compressors: For applications requiring robust performance under combined loads.
