Description
BOLA dumbbell magnetic stirring bars with a length of approximately 55 mm are PTFE-coated laboratory stirrers designed for reliable mixing in chemical and analytical workflows. Each bar combines an Alnico 5 magnetic core with a continuous polytetrafluoroethylene (PTFE) overcoat that provides universal chemical resistance across a wide range of solvents, acids and bases. The characteristic dumbbell geometry includes sliding discs of about 20 mm diameter, promoting stable rotation and reduced friction on vessel floors during magnetic stirring. Supplied as a pack of 3 pieces, the set is suited to routine sample preparation, dissolution and reaction mixing where a robust, chemically inert stirrer is required. Net weight is 0,015 kg per unit. These BOLA stirring bars from manufacturer Bohlender fit standard magnetic stirrers and hotplate stirrers used in research, quality-control and teaching laboratories. The PTFE surface helps minimise adhesion and simplifies cleaning between runs, while the dumbbell profile supports consistent coupling to the drive magnet. Choose this 55 mm variant when vessel geometry and fill volume call for a longer bar with disc-style ends for smooth, controlled agitation.
This article is part of Magnetic stirring bars, in Stirring, shaking & mixing.
Key features
- Pack size: 3 pc(s)
- Length: 55 mm
- Sliding disc diameter: 20 mm
- Material: Polytetrafluoroethylene (PTFE)
- Shape: Dumbbell
- Magnetic core: Alnico 5
- Technical Information Sheet:
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Questions about BOLA Dumbbell-Shaped Magnetic Stirring Bars, L 55 mm PTFE-coated
What is this article?
BOLA Dumbbell-Shaped Magnetic Stirring Bars, L 55 mm PTFE-coated is the article on this page. Luminix Health distributes Bohlender for laboratory use. It sits in Magnetic stirring bars, inside Stirring, shaking & mixing, in Lab instruments.
A magnetic stirring bar is the magnet coated in PTFE that spins inside a vessel, driven by a stirrer underneath. Length and shape, plain, oval or cross, have to suit the flask. A bar left against a dry glass wall will grind it.
Stirring keeps a mixture uniform or helps a solid dissolve. A magnetic stirrer spins a bar inside a closed vessel. An overhead stirrer drives a shaft when the liquid is viscous or the volume is large. A vortex mixer agitates a tube. A shaker moves a whole rack or a plate. The shape of the impeller and the speed decide whether the liquid turns over or merely spins. The vessels being stirred are indexed under ISO laboratory glassware.
Which category should I open next?
The category is Stirring, shaking & mixing. The sub-category is Magnetic stirring bars. The catalogue is Lab instruments.
Shelves beside this one are Stirring shafts, propellers & impellers, Magnetic stirrers, Stirring & mixing accessories, Homogenisers & dispersers, Shakers, rockers & rotators, Overhead stirrers and Vortex mixers.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.