Electromagnets

Adams Magnetic Products offers a wide range of electromagnets designed for controlled holding power and on-command release. These electromagnets are suitable for various industrial and consumer applications, providing reliable and customizable solutions.

What are Electromagnets?

Electromagnets generate a magnetic field through the flow of electric current, which disappears when the current stops. They offer controlled holding power, attracting and holding ferrous materials with varying degrees of force and releasing them as needed.

Advantages

Controlled Holding Power: Ability to control magnetic force with electrical current.
On-Command Release: Easily release held materials when the current stops.
Customizable: Available in various sizes, shapes, and current strengths to meet specific requirements.

Features

Variety of Forms: Available in flat-faced round, rectangle, and bi-polar rectangle forms.
Customizable Options: Different sizes, shapes, and current strengths.
High Performance: Suitable for both manual and automated applications.

Applications

Electromagnets are used in:

Electric bells
Industrial lifting magnets
Loudspeakers
Magnetic locks
Magnetic recording and data storage equipment
Magnetic separation of materials
Motors and generators
Relays

Specifications

Round and Rectangular Flat-Faced Electromagnets are available in a variety of sizes. Flat-Faced magnets should only be used on flat, smooth material where the entire magnet face is in contact. They can be used in manually operated or automated applications.

Magnets listed utilize 12 volt D.C. current (24VDC and 110VDC are available by request).
Standard Leads are 24″
Dimensions are in inches
Pounds pull ratings are maximum on low carbon steel at magnetic saturation.

Round Electromagnets

Item#	Diameter	Height	Thread Depth	Thread	Location of Leads	Watts	Pull lbs	Wt
70A0003	0.75	1.25	0.375	10-32	0.187	1.5	10	1.7 oz
70A0008	1	0.718	0.375	10-32	0.125	1	10	1.9 oz
70A0004	1	1.25	0.375	10-32	0.187	4.5	20	2.6 oz
70A0005	1.25	1.25	0.375	1/4-20	0.25	3.5	40	4.2 oz
70A0006	1.75	1.625	0.5	1/4-20	0.375	3	160	11 oz
70A0007	2	1.625	0.5	1/4-20	0.25	5.2	220	1 lb
70A0022	3	2	0.5	(2) 1/4-20	0.625	12	500	3.25 lb

Rectangular Electromagnets

Item#	Width	Length	Height	Mount	Thread Depth	Thread	Location of Leads	Watts	Pull lbs	Wt
70A0033	1.5	2.5	1.25	1	0.375	10-32	.750/.500	5	200	1 lb
70A0002	2.5	2.5	1.5	0.75	0.5	1/4-20	1.75/.375	8	450	2 lb
70A0013	2.5	4.5	2	2	0.5	1/4-20	1.50/.750	12	750	5 lb
70A0011	4	8	2.5	4	0.75	3/8-16	1.25/1.25	42	2000	16 lb

Effect of an Air Gap

An Air Gap can be the result of the actual distance from the workpiece, or a gap created by a non-ferrous material. The chart below compares the effect of an air gap on a flat-faced electromagnet compared to a similar size bi-polar electromagnet.

	Flat-Faced	Bi-Polar
Size	4" x 8" x 2-1/2" high	4" x 7-5/8" x 4-3/4" high
Face Area	30 sq. in	32 sq. in
Pole Area	15 sq. in	15 sq. in
Wattage	42	35
Holding Power	2000 lb	1100 lb
Through 1/32" air gap	200 lb	480 lb
Through 1/16" air gap	95 lb	250 lb
Through 1/8" air gap	35 lb	70 lb
Through 3/16 " air gap	0 lb	9 lb

Small Bi-Polar Electro Magnets - 12VDC (24 VDC 110 VDC Optional)

The magnetic field of bi-polar electromagnets has a greater "reach" than that of flat-faced electromagnets. Subsequently, they perform better than equivalent flat-face magnets when operating through an air gap or any type of non-magnetic material between the workpiece and the electromagnet. Bi-polars, due to their extended poles, are designed to handle round parts, parts with uneven surfaces, and odd shaped parts. Contoured, auxiliary pole shoes can be added for better contact with the workpiece.

Item#	Width	Length	Height	Mount	Thread Depth & Length	Location of Leads		Watts	Pull Lbs	WT
70A0054	15/16	1-5/8	1-5/8	7/8	10-32 X 15/16	7/16	1/4	5	25	8 oz
70A0015	1-11/16	2	1-13/16	7/8	10-32 X 15/16	1	5/16	6.5	80	1 lb
70A0012	1-1/2	3-1/2	2-5/8	2-1/4	1/4-20 X 3/8 deep	3/4	5/8	12	360	2 lbs
70A0055	2-3/8	4-1/8	3-7/8	2-1/2	3/8-16 X 1/2 deep	1-3/16	1-1/8	15	440	6 lbs
70A0056	2-7/8	5-5/8	4	3-1/2	3/8-16 X 1/2 deep	1-7/16	1-1/8	22	650	11 lbs
70A0057	4-1/8	7-5/8	4-3/4	5	1/2-13 X 1 deep	2-1/16	1-1/8	35	1100	25 lbs

Small Bi-Polar Electro Magnets - 12VDC (24 VDC 110 VDC Optional)

Electromagnets require direct current power in order to generate a magnetic field. Typically the applied voltage is Direct Current (DC), but in some cases, Alternating Current (AC) can be used. Variable power sources and remote control are available. Smaller magnets can operate on 12 volts DC; larger magnets may require 115 or 220 VDC. A rectifier is required to release the electromagnet from the surface on which it is applied. The rectifier can be mounted on the magnet, and be operated by remote control.

Whether used in manual or automated handling of ferrous parts, they must release the work as readily as they attract and hold. Release is a function of the rectifier and not the magnet. Most rectifiers incorporate a provision for reverse current that ensures positive release of even those alloy steels which are magnetically retentive. Variable power and remote control are available.

Adams does not stock rectifiers but offers them through special order. Please inquire for your requirements. Another method of obtaining direct current for magnet operation is through use of 12-volt batteries

Interested in Learning More?

Adams is ready to be a part of your products with off-the-shelf and custom applications. Contact us to find out more.