Description
Magnetic stirring bar 40×8 mm is a cylindrical laboratory stir bar for mixing liquids on magnetic stirrers and hotplate stirrers. Measuring 40 mm in length and 8 mm in diameter, it is built around a magnetic core fully encased in a PTFE coating that resists many common laboratory chemicals and simplifies cleaning after use. The bar has smooth surfaces and is supplied without a centre ring, giving an uninterrupted cylindrical profile that runs quietly in round-bottom flasks, beakers and reaction vessels. Packaged in sets of 10 pieces, it is practical for multi-position stirring stations and shared laboratory stocks. Available from manufacturer Marienfeld, these PTFE-coated stirring bars support routine dissolution, titration, buffer preparation and general sample agitation in chemistry, biochemistry and quality-control environments. The 40 mm length suits small to medium vessel volumes where stable coupling to the drive magnet is essential. Smooth PTFE surfaces reduce residue build-up and help maintain consistent stirring performance across repeated uses. This format is a standard choice for everyday bench mixing where a compact cylindrical bar without a pivot ring is preferred.
This article is part of Magnetic stirring bars, in Stirring, shaking & mixing.
Key features
- Pack size: 10 pc(s)
- Product type: Magnetic stirring bar
- Dimensions: 40×8 mm
- Shape: Cylindrical, smooth surfaces
- Centre ring: No
- EAN: 4250317321718
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Questions about Magnetic stirring bars 40x8 mm,
What is this article?
Magnetic stirring bars 40x8 mm, is the article on this page. Luminix Health distributes Marienfeld 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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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.