7034 CD/P4ADBA
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7034 CD/P4ADBA
Basic Information
System of measurement
Metric
Weight
14 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
170 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
260 mm
Outside diameter tolerance
-0.004mm to 0
Width
84 mm
Width tolerance
-0.2mm to 0
Contact angle
15 °
Ball & Washer Dimensions
Ball diameter
26.988 mm
Ball quantity
22
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
77625 lbf
Radial static load rating
110250 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
Extra light / Class A
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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7034 CD/P4ADBA Bearing Product Overview & Core Advantages
The 7034 CD/P4ADBA is a precision duplex angular contact ball bearing arranged in a back-to-back (DB) configuration. Engineered to the exacting P4A tolerance class, this bearing set is designed for applications demanding exceptional rotational accuracy, high rigidity, and reliable performance under combined loads. The extra light preload (Class A) ensures smooth, precise operation with minimal runout, making it ideal for high-speed spindles and other precision machinery where stability is critical.
7034 CD/P4ADBA Bearing Model Code Explained, Specifications & Naming Convention
| Code Segment | Technical Meaning |
|---|---|
| 7034 | Basic bearing designation, indicating a 170mm bore, 260mm OD, and 84mm width. |
| C | Specifies a 15° contact angle, optimized for carrying combined radial and axial loads. |
| D | Indicates the bearing is part of a duplex pair (two bearings). |
| DB | Specifies the Back-to-Back arrangement, which provides high moment rigidity and stability. |
| P4A | Denotes a high-precision tolerance class with enhanced dimensional and running accuracy. |
7034 CD/P4ADBA Bearing Structural Features & Performance Benefits
- High Rigidity & Stability: The duplex back-to-back (DB) arrangement creates a widely spaced load zone, significantly increasing system rigidity and resistance to overturning moments, which is critical for maintaining precision under heavy combined loads.
- Superior Load Capacity: The angular contact design with a 15° contact angle efficiently supports substantial radial loads and axial loads in both directions simultaneously.
- Optimized High-Speed Performance: The lightweight phenolic resin cage reduces centrifugal forces, while the precision-ground chrome steel balls and raceways contribute to low friction and heat generation, enabling a high limiting speed of 11,000 rpm.
- Precision Engineering: Manufactured to P4A tolerance class with extremely tight dimensional tolerances on bore, OD, and width, ensuring predictable performance and precise shaft positioning.
- Preload Configuration: The extra light preload (Class A) minimizes friction and heat build-up while eliminating internal clearance, resulting in high rotational accuracy and smooth operation.
7034 CD/P4ADBA Bearing Typical Application Areas
This high-precision duplex bearing is ideally suited for demanding applications, including:
- Machine Tool Spindles: High-speed milling, grinding, and turning centers.
- Precision Gearboxes: Where high rigidity and accurate shaft alignment are required.
- High-Frequency Motors and Spindles: Applications requiring minimal vibration and high rotational accuracy.
- Industrial Pumps and Compressors: For shafts subjected to significant combined radial and axial forces.
