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.
Ace Glass, Inc. Stirbar, PTFE, octagonal, red, 50.8mmx8.0mm
Stirbar, PTFE, octagonal, red, 50.8mmx8.0mm
Foxx Life Sciences Borosil® Reusable Solid Stirring Rods, Polished Glass Stirrers, 7mm x 305mm (Extra Length), 20/CS
Borosil® Polished Glass Solid Stirring Rods are constructed from smooth, low-expansion, low-extractable borosilicate glass. Their mechanical strength, excellent heat resistance, and outstanding chemical compatibility make them the perfect general use stirrer. Borosil® Glass Stirrers are avaialble in two widths: 7mm and Extra-Wide 9mm. Each width is available in four lengths, from the Short 150mm to the Extra Large 305mm. In collaboration with Borosil Glass Works, Foxx Life Sciences is proud to bring the outstanding quality of Borosil® Type 3.3 Borosilicate glassware to North America for the first time. Manufactured from the same USP Type 1 borosilicate glass that North American scientists have come to trust, Borosil® Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices. And thanks to a unique annealing process, Borosil® Glassware is stress-free and incredibly resistant to thermal shock.
Ace Glass, Inc. Stirbar, PTFE, octagonal, red, 25.4mmx8.0mm
25.4mm x 8.0mm red octagonal PTFE stirbar with pivot ring.
MSC American Specialties Grab Bar, 1-1/2 in OD, 42 in, Snap Flange, Type 304 Stainless Steel
This American Specialties straight grab bar features a snap flange design that conceals mounting screws for a clean and secure installation. Constructed from durable 18 gauge, Type 304 stainless steel tubing with a satin finish, it measures 1-1/2 inches in outside diameter and 42 inches in length. It meets and exceeds 2010 ADA Accessibility Standards and ANSI A117.1, supporting over 250 pounds, suitable for commercial washroom applications.
- Straight design for versatile application.
- Snap flange conceals mounting screws.
- Designed for surface mounting.
- Meets 2010 ADA Accessibility and ANSI A117.1 standards.
- Supports over 250 pounds (113.4 kg).
- 18 gauge, 1-1/2 inch outside diameter tubing.
- 42 inch total length.
- Type 304 stainless steel with satin finish.
Grainger Youth Food Bar 45 1/2 in H Black
The Carlisle Youth Food Bar is a 45 1/2 inch overall length food bar made of polypropylene plastic. It features a smooth finish and is blue in color. The food bar has a 1 3/4 inch outside diameter and comes with wall mounting hardware. It can support up to 300 lbs and is designed for use in cafeterias, breakrooms, and other food service areas to keep order when customers are waiting in line for food. The polypropylene material makes it easy to clean and durable. Overall, this is a heavy-duty food bar for organizing customers in food service settings.
MSC Mag-Mate Lift Magnet, 250 lb Capacity, Permanent, On/Off Handle, 2 Poles
This permanent lift magnet offers a 250 lb capacity for handling flat objects. It features an On/Off handle for activation and has two poles, making it suitable for various lifting applications.
- Permanent magnet type
- On/off handle for easy activation
- Maximum load capacity of 250 lb
- Two poles for effective lifting
- Includes a 3 inch ceramic magnetic retriever
- Designed for use with flat objects
- Overall length: 5 inch
- Overall width: 2.63 inch
- Overall height: 2.625 inch
Foxx Life Sciences Borosil® Reusable Solid Stirring Rods, Polished Glass Stirrers, 9mm x 305mm( Extra Length), 20/CS
Borosil® Polished Glass Solid Stirring Rods are constructed from smooth, low-expansion, low-extractable borosilicate glass. Their mechanical strength, excellent heat resistance, and outstanding chemical compatibility make them the perfect general use stirrer. Borosil® Glass Stirrers are avaialble in two widths: 7mm and Extra-Wide 9mm. Each width is available in four lengths, from the Short 150mm to the Extra Large 305mm. In collaboration with Borosil Glass Works, Foxx Life Sciences is proud to bring the outstanding quality of Borosil® Type 3.3 Borosilicate glassware to North America for the first time. Manufactured from the same USP Type 1 borosilicate glass that North American scientists have come to trust, Borosil® Laboratory Glassware offers unparalleled mechanical strength, clarity, and reliability at competitive prices. And thanks to a unique annealing process, Borosil® Glassware is stress-free and incredibly resistant to thermal shock.