Channel Magnets | McMaster-Carr

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Export Control Classification Number (ECCN)

EAR99

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29 Products

About Magnets

Choose a magnet with the right strength, material, and temperature resistance for your application.

Mount Type

Unthreaded Hole

Mount with pins, bolts, or rivets

16 products

Construction

Encased

Won’t crack or chip when bumped or dropped

23 products

Performance

Corrosion Resistant

Won't rust when exposed to moisture and mild chemicals

23 products

Electrically Insulating

Prevent the flow of electric current

23 products

Encased Ceramic Rectangle Magnets


2	3	4

6	7

Our most economical magnets with built-in durability. A protective case shields them from cracks and chips caused by bumps and drops. Ceramic magnets deliver a cost-effective balance of corrosion and temperature resistance. However, they are not as strong as rare earth magnets.

Warning: Maximum pull ratings are based on direct contact with rust-free, unpainted iron surfaces. Variations in material condition will significantly reduce these ratings. Do not use for lifting over people.

Magnets

Aluminum Case—Lightweight and corrosion-resistant, this case is best for applications with weight limitations. However, the magnetic strength is lower than steel.

Plastic Case—Lightweight, nonconductive, and naturally rust resistant.

	Thk.	Wd.	Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade		Each
Aluminum Case



	2	1 1/4"	1 1/4"	4 1/2"	75	180	C8	0000000	000000


	2	1 1/4"	1 1/4"	4 1/2"	110	180	C8	0000000	00000
	2	1 1/4"	1 7/8"	4 1/2"	150	180	C8	0000000	00000
	2	1 1/4"	2 1/2"	4 1/2"	230	180	C8	0000000	00000


	Plastic Case



			3	1 1/4"	1"	4 1/2"	45	300	C8	0000000	00000


			3	1 1/4"	1"	4 1/2"	55	300	C8	0000000	00000
			3	1 1/4"	1"	4 1/2"	65	300	C8	0000000	00000

Magnets With Unthreaded Hole

Image of Product. 7. Front orientation. Magnets. Encased Ceramic Rectangle Magnets, Magnets With Unthreaded Hole, Style 7.

Mount with pins, bolts, or rivets. There's no need for threading.

Steel Case—Maximizes holding power by concentrating magnetic force.

Zinc-Plated Steel Case—Withstands occasional exposure to moisture.

Nickel-Plated Steel Case—Offers similar corrosion resistance to chrome plating to withstand salt water and chemicals. However, nickel is more likely to wear off over time.

Cadmium-Plated Steel Case—More rust resistant than zinc-plated steel for use in wet and outdoor environments.

	Thk.	Wd.	Lg.	Hole Dia.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Mounting Hole Style	For Screw Size		Each
Steel Case



	4	1/4"	7/8"	1"	1/8"	7	175	C8	Straight	No. 4	00000000	00000


	6	5/16"	15/16"	2 5/8"	5/32"	6	175	C8	Straight	No. 6	00000000	0000
	6	1 3/8"	7/8"	3 1/4"	9/32"	40	600	C5	Straight	1/4"	00000000	00000
	6	1 3/8"	7/8"	5 1/4"	9/32"	65	600	C5	Straight	1/4"	00000000	00000
	6	1 3/8"	1 1/4"	3 1/4"	9/32"	55	600	C5	Straight	1/4"	00000000	00000
	6	1 3/8"	1 1/4"	5 1/4"	9/32"	120	600	C5	Straight	1/4"	00000000	00000
	6	2 1/8"	1 7/8"	5 1/4"	9/32"	250	600	C5	Straight	1/4"	00000000	00000


	Zinc-Plated Steel Case



			6	7/16"	1 33/64"	6"	1/4"	100	170	—	Straight	1/4"	00000000	00000


			6	29/64"	1 3/64"	8"	0.435"	60	170	—	Straight	3/8"	00000000	00000
			6	15/32"	1 3/64"	2 45/64"	0.192"	25	170	—	Straight	No. 8	00000000	0000
			6	5/8"	1 23/32"	12"	1/4"	150	170	—	Straight	1/4"	00000000	00000
			7	1"	1 5/8"	2"	7/32"	35	170	C8	Straight	No. 10	00000000	00000


			Nickel-Plated Steel Case



					6	9/16"	1"	4 1/2"	9/32"	40	175	C5	Straight	1/4"	00000000	0000


					6	9/16"	1"	6 1/2"	9/32"	55	175	C5	Straight	1/4"	00000000	00000
					6	9/16"	1"	12 1/2"	9/32"	120	175	C5	Straight	1/4"	00000000	00000


					Cadmium-Plated Steel Case



							6	1/2"	1 3/16"	2 3/4"	3/16"	35	175	C8	Straight	No. 8	00000000	0000

Alnico U-Channel Magnets

Magnetized

Through Length

Mount flush in everything from tool holders to fixture plates. These magnets are encased in a channel that concentrates the magnetic field on one side, creating a strong hold on flat surfaces. They're also heat resistant, so they won’t melt, deform, or lose magnetic strength in temperatures up to 1020° F.

Magnetized Through Length—Magnetized end to end, these magnets channel magnetic energy on the longest axis. This orientation creates deep field penetration and directional pull.

	U-Channel Wd.	Lg.	Max. Pull, lbf	Max. Temp., ° F	Magnet Grade	Direction of Magnetization		Each
5/16" Thick



	1/2"	3/16"	5"	11	1,020	Alnico 5	Through Length	0000000	000000


	3/8" Thick



			5/8"	1/4"	5"	16	1,020	Alnico 5	Through Length	0000000	00000


			1/2" Thick



					3/4"	1/4"	6"	34	1,020	Alnico 5	Through Length	0000000	00000


					5/8" Thick



							1"	3/8"	6"	40	1,020	Alnico 5	Through Length	0000000	000000


							3/4" Thick



									1 1/4"	7/16"	6"	60	1,020	Alnico 5	Through Length	0000000	000000


									7/8" Thick



											1 1/2"	1/2"	6"	60	1,020	Alnico 5	Through Length	0000000	000000