Shakers & Mixers

Frequently asked questions

What is the difference between an orbital and a reciprocating shaker?

An orbital shaker moves the platform in a circular path defined by its orbit diameter (throw), creating a swirling motion in flasks and plates that suits cell culture, fermentation, and even mixing. A reciprocating or linear shaker moves back and forth in a straight line, producing directional sloshing that favors solid-liquid extraction, wash steps, and gentle agitation of gels or membranes. Both are specified by stroke or orbit, RPM range, platform size, and maximum load.

What orbital diameter and RPM should I look for?

Orbital diameter, often called throw, ranges from about 3 mm on microplate shakers to 25-50 mm on flask shakers, and it strongly shapes mixing. Smaller orbits at higher speed suit microplates (often up to 1000+ RPM), while larger orbits at moderate speed (~20-300 RPM) suit flasks and culture. Pick a larger orbit for vigorous flask mixing and aeration, a smaller orbit for plates and gentle work. Always confirm the orbit and speed together match your vessel and protocol.

What is platform load capacity and why does it matter?

Platform load capacity is the maximum weight the shaker can move reliably, counting vessels plus their contents, usually stated in kilograms. Exceeding it strains the drive, causes uneven motion, and shortens service life. Add up your full flasks, racks, clamps, and any platform accessories, then leave margin. If you run shakers inside an incubator or environmental chamber, also confirm the platform and accessories fit the chamber dimensions and tolerate its temperature and humidity.

When do I need an overhead stirrer instead of a magnetic stirrer or shaker?

Use an overhead stirrer when volume or viscosity exceeds what a magnetic stir bar can handle, since it drives a shafted impeller with real torque. It suits viscous cannabis concentrates, oils, creams, lotions, and larger tincture or emulsion batches needing uniform blending. Compare maximum torque, speed range, rated viscosity, volume capability, and impeller type (propeller, turbine, anchor). It is often paired with a heating mantle or jacketed vessel for controlled-temperature mixing of thick fluids.