Stirring Bars and Rods
Stirring Bars and Rods
Products of various sizes, shapes, and material compositions designed to aid in manual or automatic stirring of laboratory solutions. Includes glass stirring rods, magnetic stir bars, and stir bar retrievers.
What Is a Magnetic Stir Bar?
Magnetic stir bars are stirrers or stirring hotplates used with magnets to mix a liquid or solution by creating a vortex.
A number of factors affect magnetic stir bar efficiency and effectiveness, including its size, shape, and material. Sizes (L x Diameter) range from 2 x 2 mm to 159 x 27 mm and shapes include:
- Polygonal or octagonal magnetic stir bars are the most common shapes; the multiple surfaces add turbulence to the mixing action
- Elliptical or egg-shapped stir bars work especially well with round-bottom flasks
- Wedge-shaped spin bars produce more significant turbulence for dissolving salts or in samples containing sediment
- Spin bars with fins or vanes, designed for smaller vessels, tubes, or cuvettes
- Micro (“flea”) stir bars for mixing extremely small samples
What Kind of Magnet Is Used?
Stir bar magnets are typically made from Alnico, a combination of aluminum and nickel. They may also be made from Samarium cobalt, a rare earth metal that produces the stronger magnetic force needed to mix very viscous substances.
Stir bar magnets are usually encapsulated in white or colored PTFE, hard plastic, or borosilicate glass, and coatings may meet FDA grade or USP requirements. PTFE is durable, inert, and can be autoclaved. Glass-encased cylindrical magnets are useful for high-temperature applications.
How Does It Work?
During the stirring process, integral or removable pivot rings on the stir bar reduce contact with the vessel to help avoid marring plastic surfaces. Some round stir bars have slightly raised ends that create a de facto pivot point, while others have more pronounced round centers that help to keep them in motion. Stir bars may be reusable or disposable.
Magnetic stir bars may be sold individually or in magnetic stir bar kits that include multiple bars in a range of sizes.
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Filtered Search Results
Eisco™ Glass Stirring Rods, 10 Pack
Science Education
A science education product.
A science education product.
Glass stirring rods are made from high quality borosilicate glass and feature one spade and one button end.
Shape | Sphere |
---|---|
Diameter (Metric) | 7 mm |
Color | Clear |
Quantity | 10 |
Material | Borosilicate Glass |
For Use With (Application) | Stirring |
Autoclavable | Yes |
Dynalon Labware™ Micro Stir Bar, PTFE
Science Education
A science education product.
A science education product.
For stirring test tubes, micro-beakers, etc.
Shape | Octagon |
---|
United Scientific™ Stirring Rods with Rubber Policeman
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
A science education product.
Glass stirring rods are supplied with rubber policemen already attached.
Includes | Rubber policemen on end |
---|---|
Shape | Sphere |
Color | Clear |
Quantity | 12 Pk. |
Material | Glass |
For Use With (Application) | Used to help transfer residues of precipitates or solids from the inside or beakers, flasks or other glass surfaces |
Autoclavable | Autoclavable |
Fisherbrand™ Octagon Spinbar™ Magnetic Stirring Bars
Science Education
A science education product.
A science education product.
Octagon magnetic stirring bars with integral pivot ring are the most commonly used shape for stirring small volumes in vessels such as vials, tubes and gradient makers.
Includes | Integral pivot ring |
---|---|
Shape | Octagon |
Color | White |
Quantity | 50 |
Material | Alnico Magnet |
Certifications/Compliance | USP Class VI, ISO 9001:2008, SGS |
Autoclavable | Yes |
Bel-Art™ SP Scienceware™ Spinplus™ Magnetic Stirring Bars
Science Education
A science education product.
A science education product.
Spinplus™ magnetic stirring bars add speed and efficiency to mixing operations
Shape | Cross |
---|---|
Color | White |
Quantity | 50 |
Material | Alnico Magnet |
Certifications/Compliance | FDA, USP Class VI, ISO 9001:2008 |
Autoclavable | Yes |
Bel-Art™ Spinbar Octagon Teflon Magnetic Stirring Bars
Science Education
A science education product.
A science education product.
Octagon magnetic stirring bars with integral pivot ring are the most commonly used shape.
Shape | Octagon |
---|---|
Color | White |
Material | Alnico Magnet |
Certifications/Compliance | FDA, USP Class VI, ISO 9001:2008 |
Autoclavable | Yes |
Dynalon Labware™ Octagonal Stirring Bar Kit
Science Education
A science education product.
A science education product.
PTFE octagonal stirring bars feature ALNICO V magnetic cores which are one of the most powerful permanent magnet alloys available
Fisherbrand™ PTFE Disposable Stir Bars
Science Education
A science education product.
A science education product.
The multifaceted magnetic stirring bar surface adds turbulence relative to similar size smooth cylindrical stirring bars.
Diameter (English) | 0.31 in. |
---|---|
Diameter (Metric) | 8 mm |
Color | White |
Quantity | 100 |
Material | PTFE Coated Alnico Magnet |
Certifications/Compliance | ISO 9001:2008 |
Autoclavable | Yes |
Eisco™ Glass Stirring Rods, Rounded Ends, Pack of 10
Science Education
A science education product.
A science education product.
Glass Stirring Rods are made from high quality borosilicate glass and feature two rounded ends.
Eisco™ Polypropylene Stirring Rods, 12 Pack
Science Education
A science education product.
A science education product.
Polypropylene stirring rods are ideal for stirring solutions in a variety of vessels within a lab setting.
Color | White |
---|---|
Material | Polypropylene |
For Use With (Application) | Stirring |
United Scientific™ Glass Stirring Rods
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
A science education product.
Stirring rods ideal for economical and safe stirring of samples in the lab.
Type | Stirring Rod |
---|---|
Shape | Rod |
Color | Clear |
Quantity | 12/Pk. |
Material | Flint Glass |
Autoclavable | Autoclavable |
Eisco™ Glass Stirring Rods, Button Ends, Pack of 10
Science Education
A science education product.
A science education product.
Pack of 10 glass stirring rods are made from high quality borosilicate glass and feature two button ends.
Fisherbrand™ Micro Stir Bars
Science Education
A science education product.
A science education product.
Micro Color-Coded Stirring Bar For stirring test tubes, micro-beakers, etc.
Shape | Octagon |
---|---|
Material | PTFE |
Fisherbrand™ Soft Glass Rods
Science Education
A science education product.
A science education product.
With rounded and fire-polished ends.
Includes | Rounded and fire polished ends |
---|---|
Quantity | Case of 1 pack (72 rods/pk.) |
Material | Glass |
United Scientific™ Rubber Policeman
Supplier Diversity Partner
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
Science Education
A science education product.
Small and/or diverse supplier based on Federal laws and SBA requirements.
Learn More
A science education product.
Can be used with many types of stirring rods
Type | Stirring Paddle |
---|---|
Shape | Cylinder |
Color | Black |
Quantity | 12/Pk. |
Material | Rubber |
Autoclavable | Autoclavable |