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Scienceware Teflon (PTFE) Octagonal, Green, Rare Earth Samarium Cobalt Spinbar Magnetic Stir Bar

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Product Specifications
Item Shape
Octagon
Material Type
PTFE (Polytetrafluoroethylene)
Color Name
Bright green
Brand Name
Scienceware

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Price  
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Currently showing 1-4 of 4
1" Length x 3/8" Diameter 1 371020138 B005IAJDP0 23 $11.75 Buy Options
1/2" Length x 3/8" Diameter 1 371021238 B005IAJDIM 6 $8.00 Buy Options
2" Length x 3/8" Diameter 1 371020238 B005IAJDS2 9 $21.96 Buy Options
3" Length x 1/2" Diameter 1 371020003 B005IAJDY6 1 $25.24 Buy Options

Key Features

  • Octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape
  • Teflon (PTFE) casing is chemically inert, can be used with corrosive chemicals, and helps reduce friction and wear while spinning
  • Built-in pivot ring helps reduce vibration and wear during stirring
  • Internal magnet made from samarium cobalt provides stronger magnetic attraction in viscous solutions and at high speeds than a magnet made from an alloy of alnico V
  • Green color for quick identification

Product Description

The Bel-Art Scienceware Spinbar octagonal-shaped stir bar with built-in pivot ring has a green Teflon (PTFE) casing and an internal magnet made from samarium cobalt for a range of laboratory stirring applications. The octagonal shape creates more turbulence and a stronger vortex than a round, cylindrical shape or a polygonal shape. The bar's internal magnet is made from samarium cobalt, which provides stronger magnetic attraction in viscous solutions and at high speeds than a magnet made from alnico V (an alloy of aluminum, nickel, iron, and cobalt). 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. A built-in pivot ring minimizes contact between the bar and the container to help reduce vibration and wear during stirring. The bar's green color provides quick identification. 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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