7030 ACD/P4ADBC
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7030 ACD/P4ADBC
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
25 °
Ball & Washer Dimensions
Ball diameter
23.812 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
59625 lbf
Radial static load rating
81000 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
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 ACD/P4ADBC Bearing Product Overview & Core Advantages
The 7030 ACD/P4ADBC is a precision duplex angular contact ball bearing designed for demanding applications requiring exceptional rigidity and accuracy. This matched back-to-back arrangement (DB) provides superior stability under combined loads, simultaneously handling significant radial and axial forces. Manufactured to P4A tolerance class, it ensures ultra-precise rotational accuracy and is preloaded for high rigidity and minimal deflection in operation. Its phenolic cage and optimized design contribute to reliable performance in high-speed scenarios.
7030 ACD/P4ADBC Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| AC | Angular Contact design with a 25° contact angle for optimal axial load capacity. |
| D | Indicates a duplex pair of bearings supplied as a matched set. |
| P4A | Denotes a high-precision tolerance class exceeding ABEC 7 standards, ensuring minimal runout and vibration. |
| DB | Specifies the Back-to-Back mounting arrangement, which provides high moment rigidity and excellent stability. |
| C | Indicates a Moderate preload (Class C), balancing rigidity and operational temperature. |
7030 ACD/P4ADBC Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a rigid bearing system that effectively resists moment loads and shaft deflection, making it ideal for precision spindles.
- Superior Load Capacity: With a 25° contact angle and duplex design, this bearing excels at handling combined radial and axial loads simultaneously. Its high dynamic and static load ratings (59,625 lbf / 81,000 lbf) ensure long service life under heavy-duty conditions.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, lowers friction, and enables a high limiting speed of 11,000 rpm. The open design facilitates efficient lubrication and cooling.
- Precision Engineering: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, guaranteeing precise running accuracy and consistent performance.
- Durable Construction: Made from high-grade chrome steel for both rings and balls, providing excellent wear resistance and fatigue life.
7030 ACD/P4ADBC Bearing Typical Application Areas
The 7030 ACD/P4ADBC is engineered for high-performance machinery where precision, speed, and rigidity are paramount. Key applications include:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Industrial transmissions requiring accurate shaft positioning.
- High-Frequency Motors and Spindles: Applications demanding minimal vibration and high rotational accuracy.
- Industrial Pumps and Compressors: For handling significant axial and radial loads reliably.
