7030 CD/P4ADBB
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 CD/P4ADBB
Basic Information
System of measurement
Metric
Weight
8.35 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
70 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
63225 lbf
Radial static load rating
85500 lbf
Limiting speed
11 X 1000 rpm
Lubrication
Lubricated
Matched arrangement
Duplex Back-to-Back (DB)
Number of bearings in matched set
2
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 CD/P4ADBB Bearing Product Overview & Core Advantages
The 7030 CD/P4ADBB is a precision duplex angular contact ball bearing configured in a back-to-back (DB) arrangement. Engineered for applications demanding exceptional rotational accuracy and rigidity, this bearing is designed to accommodate combined loads—simultaneously handling significant radial loads and axial loads in both directions. Its P4A tolerance class and light preload (Class B) ensure smooth, precise operation, making it ideal for high-performance, high-reliability machinery where minimal runout and thermal stability are critical.
7030 CD/P4ADBB Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| CD | Indicates a duplex bearing with a 15° contact angle and specific internal radial clearance and preload. |
| P4A | Denotes an ultra-precision tolerance class with enhanced dimensional and running accuracy, exceeding standard ABEC 7/ISO P4 levels. |
| DB | Specifies the back-to-back matched arrangement, providing high moment rigidity and excellent stability under complex loading conditions. |
7030 CD/P4ADBB Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) design creates a wide effective spread between load centers, significantly increasing the bearing's resistance to moment loads and enhancing overall system stiffness.
- Superior Load Capacity: The 15° contact angle and optimized internal geometry enable the bearing to handle substantial combined radial and axial loads from both directions simultaneously.
- Precision & High-Speed Performance: Manufactured to P4A tolerance class and featuring a lightweight, robust phenolic cage, this bearing ensures minimal vibration and is capable of high-speed operation up to 11,000 rpm.
- Optimized Material & Lubrication: Components made from high-grade chrome steel provide excellent wear resistance and durability. The bearing comes pre-lubricated for immediate operation within a temperature range of -30°C to 110°C.
7030 CD/P4ADBB Bearing Typical Application Areas
This precision duplex bearing is ideally suited for demanding applications requiring high rigidity and running accuracy, including:
- Machine Tool Spindles (e.g., milling, grinding, and turning centers)
- High-Precision Gearboxes and Transmission Systems
- Industrial Pumps and Compressors
- Precision Rotary Tables and Indexing Heads
- Medical and Laboratory Equipment Spindles
