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Bel-Art Products Teflon (PTFE), Round Spinbar Magnetic Stir Bar, with Tapered Ends

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Product Specifications
Item Shape
Round
Material Type
PTFE (Polytetrafluoroethylene)
Color Name
White
UNSPSC Code
41121802
Brand Name
Bel-Art Products

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Currently showing 1-4 of 4
Round, White, 20mm Length, 8mm Diameter B002VBW5SG Temporarily out of stock. Order now and we'll deliver when available. $4.40 Buy Options
Round, White, 30mm Length, 9mm Diameter B002VBW5SQ yes $5.10 Buy Options
Round, White, 40mm Length, 9mm Diameter B002VBW5T0 yes $5.45 Buy Options
Round, White, 50mm Length, 9mm Diameter B002VBW5TA yes $6.40 Buy Options

Key Features

  • Round shape with tapered ends has a rounded pivot point to reduce friction and wear while spinning
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Smooth surface provides quicker cleanup and less risk of cross-contamination than bars with pivot rings
  • Internal magnet made from alnico V, an alloy of aluminum, nickel, iron, and cobalt
  • Casing material is FDA approved for use in food, drug, and cosmetic applications

Product Description

The Bel-Art Scienceware Spinbar round stir bar with tapered ends has a white Teflon (PTFE) casing and an internal magnet made from alnico V (an alloy of aluminum, nickel, iron, and cobalt) for a range of laboratory stirring applications. The round shape with tapered ends has a rounded pivot point to reduce friction and wear while spinning. The magnet sits inside a Teflon (polytetrafluoroethylene, or PTFE) casing, which is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning. The bar's smooth surface provides quicker cleanup and less risk of cross-contamination than bars with pivot rings. The end diameters of the bar are 1 mm less than the center diameter. The casing material is FDA approved for use in food, drug, and cosmetic applications.

Magnetic stir bars (sometimes called stirring bars, spin bars, or fleas) are used to stir a liquid or solution in biological, chemical, medical, and research laboratory applications. The stir bar is placed inside a container of liquid or solution that is seated on a magnetic stirrer (also called a magnetic mixer), which is a laboratory device that creates a rotating magnetic field using a rotating magnet or multiple stationary electromagnets. The rotating magnetic field causes the bar to spin, which stirs the liquid or solution. Stirring bars are offered in a variety of sizes and shapes, and they are encased in materials such as glass or plastic to help prevent contamination of the liquid or solution, to reduce friction, and to provide resistance to chemicals, abrasion, and heat. The bar may have a pivot ring or pivot point to minimize contact with the container, reduce friction, and improve its spinning. The size and shape of the container and the volume and viscosity of the liquid or solution to be stirred determine which stir bar shape, size, and casing will suit a particular application.

Bel-Art Products manufactures scientific products, including labware, testing equipment, and safety supplies, under the Bel-Art and Scienceware brands. The company, founded in 1946, is headquartered in Wayne, NJ.

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