Swinging-Bucket Rotors
Common Applications of Swinging-Bucket Rotors:
- Density gradient centrifugation
- Viral vector and extracellular vesicle purification
- Blood component separation
- Clinical and diagnostic sample preparation
- Bioprocessing and cell culture workflows
- Plate and microplate centrifugation
- Separation of delicate biological samples requiring gentle handling
Swinging-bucket rotors are designed to hold sample buckets that move from a vertical resting position to a horizontal position during centrifugation. This rotor design provides a uniform sedimentation path and is commonly selected for applications that require high separation quality, gentle sample handling, or density gradient centrifugation.
Swinging-bucket rotors are widely used in clinical, research, and bioprocessing laboratories for blood processing, cell isolation, density gradient separations, and sample preparation workflows. Because tubes reach a horizontal position during operation, samples can be separated into consistent layers during density gradient centrifugation and into pellets at the bottom of the tube during differential centrifugation.
Beckman Coulter Life Sciences offers a broad range of swinging-bucket rotors for ultracentrifuges, high-speed centrifuges, and general-purpose centrifuges. Rotor selection depends on factors such as sample volume, throughput requirements, application type, and compatibility with specific centrifuge platforms.
FAQ on Swinging-Bucket Rotors
Why use a swinging-bucket rotor for density gradient centrifugation?
Density gradient centrifugation requires samples to separate into distinct layers based on density. Because swinging-bucket rotors position tubes horizontally during operation, they help create uniform gradients and well-defined sample bands, making them a preferred choice for many gradient-based separation workflows.
What applications are swinging-bucket rotors commonly used for?
Swinging-bucket rotors are frequently used for density gradient centrifugation, blood processing, bioprocessing workflows, and when highly purified samples are required . They are often selected when maintaining sample integrity and achieving high separation quality are important.
How does a swinging-bucket rotor work?
In a swinging-bucket rotor, sample tubes begin in a vertical position and gradually move to a horizontal position during centrifugation. This orientation allows particles to travel evenly through the sample, making swinging-bucket rotors especially suitable for density gradient separations and applications that require distinct sample layers.
What is the difference between a swinging-bucket rotor and a fixed-angle rotor?
A swinging-bucket rotor holds samples horizontally during centrifugation, making it well suited for density gradient separations and applications that require well-defined sample layers. They can also be used for pelleting and result in the pellet forming at the very bottom of the tube. A fixed-angle rotor keeps tubes at a constant angle and is typically preferred for rapid pelleting applications. The best choice depends on the separation objective and sample type.
What is a swinging-bucket rotor?
A swinging-bucket rotor is a centrifuge rotor that allows sample buckets to pivot during centrifugation. As rotational speed increases, the buckets swing outward into a horizontal position, creating a consistent linear sedimentation path that supports efficient sample separation.
