Magnetic Stirrers | McMaster-Carr

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77 Products

Magnetic Stirring Bars


Octagon White	Octagon Blue	Octagon Red

Octagon Yellow	Polygon	Capsule

Oval	Triangle	Cylinder

Coated with PTFE, these stirring bars are corrosion and chemical resistant. Some are available in different colors for easy identification.

Octagon—Octagonal stirring bars are the most commonly used shape. They have a large surface area to generate more turbulence than round bars, so they stir up particles for better mixing.

Polygon—Polygonal stirring bars spin smoothly like round bars, but also generate turbulence for mixing particles, such as salts, into solutions. Select the large ODs for jobs in drums or tanks.

Capsule—Capsule stirring bars are sized just right for small containers, such as vials, tubes, and gradient makers.

Oval—Oval stirring bars work best with round-bottom flasks.

Triangle—Triangular stirring bars are designed to fit small vials. Use the _3/16” wide bars for 1 mL vials and the _3/8” wide bars for 3-5 mL vials.

Cylinder—Cylinder stirring bars spin more smoothly than octagonal bars.

						White		Blue		Red		Yellow
	OD	Lg.	Ht.	Wd.	Coating Material		Each		Each		Each		Each
Octagon



		1/8"	1/2"	—	—	PTFE	00000000	00000	———	0	00000000	00000	———	0


		5/16"	1/2"	—	—	PTFE	00000000	0000	00000000	00000	———	0	———	0
		5/16"	5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	7/8"	—	—	PTFE	00000000	0000	00000000	0000	———	0	———	0
		5/16"	1"	—	—	PTFE	00000000	0000	00000000	0000	00000000	0000	———	0
		5/16"	1 1/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	1 1/2"	—	—	PTFE	00000000	0000	00000000	00000	00000000	00000	00000000	000000
		5/16"	1 5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	2"	—	—	PTFE	00000000	0000	00000000	00000	00000000	00000	———	0
		5/16"	2 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


		3/8"	7/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	1"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 7/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	2 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		1/2"	1 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		1/2"	3"	—	—	PTFE	00000000	00000	00000000	00000	———	0	———	0


		Polygon



				3/16"	1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


				1/4"	3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				1/4"	5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				1/4"	2 5/16"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
				5/16"	3/4"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	1"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	1 3/16"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	1 5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				3/8"	2 3/4"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
				3/8"	3 1/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0


				5/8"	5"	—	—	PTFE	00000000	000000	———	0	———	0	———	0
				1 1/16"	6 1/4"	—	—	PTFE	00000000	000000	———	0	———	0	———	0


				Capsule



						1/8"	5/16"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


						1/8"	3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
						1/8"	1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


						Oval



						3/16"	3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


						1/4"	5/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/8"	3/4"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						1/2"	1"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						5/8"	1 1/4"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						5/8"	1 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/4"	2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/4"	2 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/4"	3"	—	—	PTFE	00000000	00000	———	0	———	0	———	0


						Triangle



								—	—	3/8"	3/16"	PTFE	00000000	00000	———	0	———	0	———	0


								—	—	5/8"	3/8"	PTFE	00000000	00000	———	0	———	0	———	0


								Cylinder



		5/16"								1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


		5/16"	3/4"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	1"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	1 1/4"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		5/16"	1 1/2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 1/2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	2 1/8"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		1/2"	3"							—	—	PTFE	00000000	00000	———	0	———	0	———	0


		5/8"	2 1/2"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		5/8"	4"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		5/8"	5"							—	—	PTFE	00000000	00000	———	0	———	0	———	0

Stirring Hot Plates for Glass Containers


	NEMA 5-15

A magnet embedded in the heating surface works with a magnetic stirring bar to stir liquids automatically. These hot plates have a hot surface warning light to protect against accidental burns. They are ceramic or ceramic coated, so they clean easily and resist acids and alkalies.

Ceramic-Coated Aluminum Heating Surface—Ceramic-coated aluminum hot plates maintain a uniform temperature across the entire heating surface while resisting warping and buckling at low temperatures.

	Heating Surface					Temp., ° C		Overall
	Dia.	Wd.	Dp.	Material	Wt. Cap., lb.	Setting	Adjustment Increment	Ht.	Wd.	Dp.	Housing Material	Wattage, W	Temp. Control Type	No. of Blades	Electrical Connection	NEMA Type	Certification		Each
120V AC—Plug In



		—	7"	7"	Ceramic	40	5 to 550	0.5	4 9/16"	8 11/16"	12 15/16"	Aluminum	1,582	Dial	3	Straight Blade	5-15	TUV Rheinland Certified	00000000	0000000


		—	10"	10"	Ceramic	45	5 to 500	0.5	4 5/8"	11 9/32"	15 13/16"	Aluminum	1,650	Dial	3	Straight Blade	5-15	TUV Rheinland Certified	00000000	000000
		5 5/16"	—	—	Ceramic-Coated Aluminum	40	5 to 360	0.5	4 1/2"	6 7/8"	10 3/16"	Aluminum	600	Dial	3	Straight Blade	5-15	TUV Rheinland Certified	00000000	000000

Accessories for Hot Plates

Stirring Bars


Octagon White	Octagon Blue	Octagon Red

Octagon Yellow	Polygon	Capsule

Oval	Triangle	Cylinder

All of these magnetic stirring bars are corrosion and chemical resistant. Some are available in different colors for easy identification.

Octagon—Octagon stirring bars are the most commonly used shape. They have a large surface area to generate more turbulence than round bars, so they stir up particles for better mixing.

Polygon—Polygon stirring bars spin smoothly like round bars, but also generate turbulence for mixing particles, such as salts, into solutions. Select the large ODs for jobs in drums or tanks.

Capsule—Capsule stirring bars are sized just right for small containers, such as vials, tubes, and gradient makers.

Oval—Oval stirring bars work best with round-bottom flasks.

Triangle—Triangle stirring bars are designed to fit small vials. Use the_3/16” wide bars for 1 mL vials and the _3/8” wide bars for 3-5 mL vials.

Cylinder—Cylinder stirring bars spin more smoothly than octagonal bars.

						White		Blue		Red		Yellow
	OD	Lg.	Ht.	Wd.	Coating Material		Each		Each		Each		Each
Octagon



		1/8"	1/2"	—	—	PTFE	00000000	00000	———	0	00000000	00000	———	0


		5/16"	1/2"	—	—	PTFE	00000000	0000	00000000	00000	———	0	———	0
		5/16"	5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	7/8"	—	—	PTFE	00000000	0000	00000000	0000	———	0	———	0
		5/16"	1"	—	—	PTFE	00000000	0000	00000000	0000	00000000	0000	———	0
		5/16"	1 1/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	1 1/2"	—	—	PTFE	00000000	0000	00000000	00000	00000000	00000	00000000	000000
		5/16"	1 5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	2"	—	—	PTFE	00000000	0000	00000000	00000	00000000	00000	———	0
		5/16"	2 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


		3/8"	7/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	1"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 7/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		3/8"	2 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		1/2"	1 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
		1/2"	3"	—	—	PTFE	00000000	00000	00000000	00000	———	0	———	0


		Polygon



				3/16"	1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


				1/4"	3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				1/4"	5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				1/4"	2 5/16"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
				5/16"	3/4"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	1"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	1 3/16"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	1 5/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				5/16"	2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
				3/8"	2 3/4"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
				3/8"	3 1/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0


				5/8"	5"	—	—	PTFE	00000000	000000	———	0	———	0	———	0
				1 1/16"	6 1/4"	—	—	PTFE	00000000	000000	———	0	———	0	———	0


				Capsule



						1/8"	5/16"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


						1/8"	3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0
						1/8"	1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


						Oval



						3/16"	3/8"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


						1/4"	5/8"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/8"	3/4"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						1/2"	1"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						5/8"	1 1/4"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						5/8"	1 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/4"	2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/4"	2 1/2"	—	—	PTFE	00000000	00000	———	0	———	0	———	0
						3/4"	3"	—	—	PTFE	00000000	00000	———	0	———	0	———	0


						Triangle



								—	—	3/8"	3/16"	PTFE	00000000	00000	———	0	———	0	———	0


								—	—	5/8"	3/8"	PTFE	00000000	00000	———	0	———	0	———	0


								Cylinder



		5/16"								1/2"	—	—	PTFE	00000000	0000	———	0	———	0	———	0


		5/16"	3/4"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	1"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	1 1/4"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		5/16"	1 1/2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		5/16"	2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	1 1/2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	2"							—	—	PTFE	00000000	0000	———	0	———	0	———	0
		3/8"	2 1/8"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		1/2"	3"							—	—	PTFE	00000000	00000	———	0	———	0	———	0


		5/8"	2 1/2"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		5/8"	4"							—	—	PTFE	00000000	00000	———	0	———	0	———	0
		5/8"	5"							—	—	PTFE	00000000	00000	———	0	———	0	———	0

Stirring Bar Retrievers

Flexible

Rigid

Use magnetic stirring bar retrievers to fish stirring bars out of containers. All are corrosion and chemical resistant.

Flexible—Flexible retrievers can reach into corners.

Rigid—Rigid retrievers can also be used as stirring rods.

Flexibility	Lg.	OD	Coating Material	Color		Each
Flexible	13"	1/2"	PTFE	White	0000000	000000
Rigid	12"	3/8"	Polyethylene	White	0000000	00000

Magnetic Stirring Bar Retrievers

Flexible

Rigid

Fish stirring bars out of containers using the magnetic end of these retrievers. All are corrosion and chemical resistant.

Flexible—Flexible retrievers can reach into corners.

Rigid—Rigid retrievers can also be used as stirring rods.

Flexibility	Lg.	OD	Coating Material	Color		Each
Flexible	13"	1/2"	PTFE	White	0000000	000000
Rigid	12"	3/8"	Polyethylene	White	0000000	00000