PTFE Magnetic Stirring bars

PTFE Magnetic Stirring Bars for Laboratory Mixing

Shop TEFLEX PTFE-coated magnetic stirring bars for mixing compatible laboratory solutions. The range includes straight and oval stir bars in several sizes, plus a magnetic stir bar retriever. Choose a bar that suits your vessel, liquid volume and magnetic stirrer, whether preparing reagents or keeping a sample mixed during a procedure.

Choose the Right Stir Bar Size and Shape

Compare bar length and diameter with the vessel base and available clearance. Straight and oval designs provide different contact and movement characteristics; the best choice depends on vessel geometry, liquid viscosity and stirrer coupling. Check each listing for exact dimensions and pack quantity before ordering.

Begin at a low stirring speed and increase gradually within your equipment's operating instructions. If the bar loses coupling or moves erratically, reassess the bar, vessel position, liquid and speed rather than assuming a larger bar will perform better.

PTFE Coating, Compatibility and Care

The PTFE coating offers broad chemical resistance and a smooth surface for laboratory handling. Suitability depends on the reagent, concentration, exposure time and operating temperature. The coating's material properties do not establish the maximum temperature of the complete magnetic bar.

Inspect the coating for wear or damage and clean between samples using a suitable procedure. An appropriate retriever can help remove a bar without pouring out the entire sample. Check chemical compatibility for the retriever as well as the stirring bar.

Complete Your Mixing Workflow

Compare PTFE beakers for reagent preparation and PTFE bottles for compatible storage. Explore the full PTFE fluoroware range for related TEFLEX laboratory supplies.

For help comparing materials and formats, read our guide to selecting PTFE labware and PTFE bottles and chemical resistance guide.