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Choosing a magnetic stir bar (also known as magnetic fleas) which is the right shape and size for your task can make the stirring action much more effective.
Mixing with a magnetic stir bar on a hotplate stirrer
Use our guide below to choose a suitable magnetic stirring bar…
Choosing the right shape of magnetic stir bar will ensure the mixing is efficient and reduce wear and abrasion of the PTFE coating.
| Name | Applications |
| Cylindrical Stir Bar | General purpose stirrer for smooth stirring |
| Plain Stir Bar | Similar to cylindrical, but with more turbulence at low speed |
| Pivot Ring Stir Bar | For use where the container base is slightly curved or uneven. The pivot lets the stir bar adopt the optimum position for stirring |
| Octahedral Stir Bar | Similar to the pivot ring type, but with more turbulence at low speed |
| Spherical Stir Bar | For stirring in test tubes or eccentric stirring |
| Oval Stir Bar | For use in round bottom flasks (boiling flasks) |
| Cross Stir Bar | Suitable for general purpose stirring, very stable to reduce "jumping" |
| Crosshead Stir Bar | For use in tube shaped containers or other containers - ideal when working in both test tubes and beakers or flasks |
| Triangular Stir Bar | For dissolving solids or mixing of sediments. The flat base gives a scraping action for disturbing solids |
For more information on PTFE magnetic stir bars, just follow the links above or contact us
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Cylindrical PTFE Stirring BarsStarting at
£0.84
excl. VAT
£1.01
inc. VAT
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Plain PTFE Magnetic Stirring BarsStarting at
£1.40
excl. VAT
£1.68
inc. VAT
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Pivot Ring PTFE Stirring BarsStarting at
£1.13
excl. VAT
£1.36
inc. VAT
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Octahedral PTFE Stirring Bars with Pivot RingsStarting at
£1.45
excl. VAT
£1.74
inc. VAT
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