7026 ACD/P4AQBCD
7000 Series Super Precision Angular Contact Ball Bearings
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Part No.
Part No.
7026 ACD/P4AQBCD
Basic Information
System of measurement
Metric
Weight
12.9 kg
Tolerance class
P4A
Seal type
Open
For load direction
Angular Contact
Main Dimensions
Bore diameter
130 mm
Bore diameter tolerance
-0.004mm to 0
Outside diameter
200 mm
Outside diameter tolerance
-0.004mm to 0
Width
132 mm
Width tolerance
-0.2mm to 0
Contact angle
25 °
Ball & Washer Dimensions
Ball diameter
22.225 mm
Ball quantity
21
Performance
Temperature range
- 30°C to 110 °C
Radial dynamic load rating
83475 lbf
Radial static load rating
135000 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
Heavy / Class D
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
Price available upon request.
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7026 ACD/P4AQBCD Bearing Product Overview & Core Advantages
The 7026 ACD/P4AQBCD is a precision quadruplex angular contact ball bearing designed for applications demanding exceptional rigidity and load capacity. This matched set of four bearings, arranged in a back-to-back configuration (QBC), is engineered to handle combined radial and axial loads simultaneously. Manufactured to a P4A tolerance class, it offers superior running accuracy, making it ideal for high-precision, high-stiffness machinery. The heavy preload (Class D) ensures maximum system rigidity and rotational accuracy right from installation, eliminating the need for initial adjustment.
7026 ACD/P4AQBCD Bearing Model Code Explained, Specifications & Naming Convention
| Suffix Code | Technical Meaning |
|---|---|
| ACD | Angular Contact Design with a 25° contact angle, optimized for high axial load capacity. |
| P4A | Indicates a high-precision tolerance class with enhanced dimensional and running accuracy requirements. |
| QBC | Denotes a Quadruplex Back-to-Back matched set arrangement, providing high moment stiffness. |
| D | Specifies a Heavy Preload (Class D) for maximum system rigidity. |
7026 ACD/P4AQBCD Bearing Structural Features & Performance Benefits
- Exceptional Rigidity: The quadruplex back-to-back arrangement creates a highly rigid bearing system capable of withstanding heavy combined loads and significant overturning moments, ensuring precise shaft positioning.
- High Load Capacity: The 25° contact angle and robust construction enable high radial dynamic load rating (83,475 lbf) and static load rating (135,000 lbf), making it suitable for demanding applications.
- Precision Performance: Manufactured to P4A tolerance class with tight dimensional tolerances on the bore, outside diameter, and width, this bearing guarantees high running accuracy and minimal vibration.
- Optimized Cage Design: The phenolic cage contributes to smooth operation at high speeds, with a limiting speed of 11,000 rpm, and offers good performance in lubricated environments.
- Pre-lubricated & Ready-to-Install: The bearing is supplied lubricated, simplifying installation and ensuring immediate operational readiness.
7026 ACD/P4AQBCD Bearing Typical Application Areas
This bearing is specifically designed for heavy-duty, high-precision machinery where extreme rigidity and accuracy are paramount. Key applications include:
- Machine Tool Spindles: For high-speed milling, grinding, and turning centers.
- Precision Gearboxes: Especially in industrial robotics and high-torque transmission systems.
- Industrial Pumps and Compressors: Where high axial and radial loads are present.
- Aerospace Test Rigs and Positioning Systems: Requiring uncompromising accuracy and stiffness.
