Application

By eliminating costly clamps and fixtures, Three-Pole Cylindrical Insulated Magnet Assemblies provide an economical solution to many material handling applications involving ferrous products. These magnets can improve productivity in applications that include part feeding, automatic part transfers, welding and holding parts in metal forming operations. All MPI Cylindrical Insulated Magnet Assemblies are supplied standard with precision-ground flat, extended mild steel poles, which can be machined to custom fit irregular shapes. These magnets are not affected by vibration or temperatures up to 180° F and are fully insulated for direct mounting to steel surfaces.

Construction:

Powerful Ceramic Permanent Magnet material produces a high concentration of magnet energy in the mild steel poles contact surfaces. A nonferrous aluminum cup, potted with high-impact epoxy, provides both physical durability and insulation against demagnetization. Actual loss of 1/2 of 1% over 100 years can be expected, under normal conditions.

Selection:

The three-, four- and five-pole Cylindrical Insulated Magnet Assemblies are a continuation of the two-pole design with the additional benefits of increased holding values, a wider range of sizes and tapped or countersunk thru-holes for mounting. Like the two-pole design, these multipole assemblies can be mounted directly to steel surfaces. They are not, however, suitable for welding applications. Holding values shown in the charts are the result of testing under ideal conditions, indicating vertical pull-off of smooth, clean surfaces and will decrease with the use of heavily oiled, rusty, painted, or thin material thickness. Use a proportionate safety factor when selecting holding values for your application. Special designs are common with this product line and MPI's engineering and testing facilities are available to satisfy your magnet requirements.

Caution:

Care must be used not to drill, tap or change the magnet assemblies without risk of reducing the holding values as shown in the following charts.

Download PDF: Holding Magnets

Three-Pole – Series 3P Selection Guide
Part No.	Dimensions		Holding Value Lbs.
	Dia. A	Length “B”
3P-6250	0.625	0.5	4
3P-6262		0.625	5
3P-6275		0.75	6
3P-6287		0.875	6.5
3P-6210		1	7
3P-7550	0.75	0.5	9
3P-7562		0.625	10.5
3P-7575		0.75	12.5
3P-7587		0.875	13.5
3P-7510		1	15.5
3P-7511		1.125	16
3P-7512		1.25	17
3P-8750	0.875	0.5	9.5
3P-8762		0.625	15
3P-8775		0.75	20
3P-8787		0.875	25
3P-8710		1	27
3P-8711		1.125	29
3P-8712		1.25	31
3P-8715		1.5	32.5
3P-1050	1	0.5	10.5
3P-1062		0.625	17
3P-1075		0.75	25
3P-1087		0.875	28.5
3P-1010		1	30
3P-1011		1.125	31
3P-1012		1.25	32
3P-1015		1.5	33
3P-1250	1.125	0.5	14.5
3P-1262		0.625	21
3P-1275		0.75	29
3P-1287		0.875	36.5
3P-1210		1	40
3P-1211		1.125	46.5
3P-1212		1.25	53.5
3P-1215		1.5	60
3P-1550	1.5	0.5	19
3P-1562		0.625	25
3P-1575		0.75	45
3P-1587		0.875	55
3P-1510		1	65
3P-1511		1.125	70
3P-1512		1.25	80

Specifications subject to change.

Three-Pole with Bottom Tapped Hole – Series 3PT Selection Guide
Part No.	Dimensions		Tap		Holding Value Lbs.
	Dia. A	Length “B”	Dia. A	Depth D
3PT-6250	0.625	0.5	Oct-32	0.187	4
3PT-6262		0.625			5
3PT-6275		0.75			6
3PT-6287		0.875			6.5
3PT-6210		1			7
3PT-7550	0.75	0.5	Oct-32	0.187	9
3PT-7562		0.625			10.5
3PT-7575		0.75			12.5
3PT-7587		0.875			13.5
3PT-7510		1			15.5
3PT-7511		1.125			16
3PT-7512		1.25			17
3PT-8750	0.875	0.5	.250-20	0.25	9.5
3PT-8762		0.625			15
3PT-8775		0.75			20
3PT-8787		0.875			25
3PT-8710		1			27
3PT-8711		1.125			29
3PT-8712		1.25			31
3PT-8715		1.5			32.5
3PT-1050	1	0.5	.250-20	0.25	10.5
3PT-1062		0.625			17
3PT-1075		0.75			25
3PT-1087		0.875			28.5
3PT-1010		1			30
3PT-1011		1.125			31
3PT-1012		1.25			32
3PT-1015		1.5			33
3PT-1250	1.125	0.5	.250-20	0.25	14.5
3PT-1262		0.625			21
3PT-1275		0.75			29
3PT-1287		0.875			36.5
3PT-1210		1			40
3PT-1211		1.125			46.5
3PT-1212		1.25			53.5
3PT-1215		1.5			60
3PT-1550	1.5	0.5	.250-20	0.25	19
3PT-1562		0.625			25
3PT-1575		0.75			45
3PT-1587		0.875			55
3PT-1510		1			65
3PT-1511		1.125			70
3PT-1512		1.25			80

Specifications subject to change.

Three-Pole with Thru Hole – Series 3PH Selection Guide
Part No.	Dimensions		82’ C Sink	Holding Value Lbs.
	Dia. A	Length “B”	C
3PH-7550	0.75	0.5	#8 Flat Head Machine Screw	8.5
3PH-7562		0.625		10
3PH-7575		0.75		11.5
3PH-7587		0.875		12
3PH-7510		1		13
3PH-7511		1.125		14.5
3PH-7512		1.25		16
3PH-8750	0.875	0.5	#8 Flat Head Machine Screw	9
3PH-8762		0.625		12.5
3PH-8775		0.75		19
3PH-8787		0.875		23
3PH-8710		1		24.5
3PH-8711		1.125		26.5
3PH-8712		1.25		28.5
3PH-8715		1.5		30
3PH-1050	1	0.5	#8 Flat Head Machine Screw	10.5
3PH-1062		0.625		13
3PH-1075		0.75		20
3PH-1087		0.875		24
3PH-1010		1		26
3PH-1011		1.125		28.5
3PH-1012		1.25		30
3PH-1015		1.5		31.5
3PH-1250	1.125	0.5	#8 Flat Head Machine Screw	14.5
3PH-1262		0.625		20
3PH-1275		0.75		28
3PH-1287		0.875		35
3PH-1210		1		38
3PH-1211		1.125		40
3PH-1212		1.25		42
3PH-1215		1.5		48
3PH-1550	1.5	0.5	1/4 Flat Head Machine Screw	17.5
3PH-1562		0.625		23
3PH-1575		0.75		44
3PH-1587		0.875		53
3PH-1510		1		66
3PH-1511		1.125		68
3PH-1512		1.25		76