Magnetic Assembly Supplier - Magnet Supplier

Permanent Lifting Magnets

These compact, powerful rare earth lifting magnets are permanent magnets that have on/off functionality, but require no electricity! Not only does this reduce operating costs, but also eliminates the fear of dropping the load being lifted due to power failures.

Applications:

·Load steel plate into vertical storage racks
·Lift steel plate from vertical storage racks to horizontal machining centersor cutting tables
·Lift steel plate, rounds or billets into place for equipment/machinery manufacturing

We are selling only certified Permanent Lifting Magnets

Our permanent lifting magnets are tested in the SGS-CSTC in Shanghai Lab.

Individually Tested

Each magnet is individually tested before goes out, including a certificate of the capacity.

Machinery Directive

Each permanent lifting magnet meets the requirements of the Machinery Directive of European Parliament and European Council 2006/42/EC Annex-VII.

3.5 Times Rated

Each permanent lifting magnets is 3.5 times rated capacity factor of safety and meets ASME B30.20 SAFTY STANDARDS

a certificate on permanent lifting magnet manufacturing

Standard(s) Referenced: # EN
13155:2003+A2:2009 ; EN ISO 12100:2010 #

Essen now offers below six standard
permanent lifting magnets:

Model	Rated lifting strength (kgf)	Cylindrical lifting strength (kgf)	Max pull-off strength (kgf)	Length	Width	Height	Arm Length	Operation temperature (°C)	Dead weight (kg)
PML-100	100	50	350	64	92	64	126	<80	3
PML-300	300	150	1050	92	162	91	155	<80	10
PML-600	600	300	2100	122	232	117	196	<80	24
PML-1000	1000	500	3500	176	258	163	285	<80	50
PML-2000	2000	1000	7000	234	378	212	426	<80	125
PML-3000	3000	1200	10500	255	525	256	735	<80	218

Custom Sizes & Configurations Available.
You also could have your own logo on the lifters as well if you so wish.

Neo Pot Magnets

Pot magnets (also as capped or holding magnets) are assembled of a round mild steel cover, a non-ferrous insulator and a Neodymium magnet core, pressed together. There is a center hole, or a tap hole, or a tap bolt on the back of the assembly for mounting. These details are designed for affixing into a design with a screw, a bolt or other secure methods.

Applications include:

Magnetic holding
Lifting
Antenna Mounting
Positioning

Besides our standard models (Stock Sizes) listed bellow, we can make assemblies to custom designs.

Our Neodymium Pot Magnet Standard Models

Essen Magnetics offers a range of standard Neodymium Pot Magnets. The dimensions in diameter and height, size of hole or feature and holding force of the magnets are listed in the tables below.

EN-A Series

Neo Pot magnet flat with bore and 90° counter bore (Countersunk Pot Magnets)

a close up of neo pot magnet flat with bore and 90 degree counter bore

illustration of neo pot magnet flat with bore and 90 degree counter bore

Also called countersunk pot magnets, they are assembled with a NdFeB ring magnet and soft steel cover. The Neodymium magnet can be Nickel or Zinc plated and the steel cover can be Nickel, Zinc or Chrome plated. This magnet is designed for screws to be used for permanent positioning with a flush screw head with the magnet. Our range of countersunk pot magnets can accommodate a wide range of screws depending on the size of the magnet.

Neodymium pot magnets with bore and a 90-degree counterbore are commonly used to incorporate magnetic attraction into everyday applications. This magnet helps non-magnetic materials, such as plastic, timber, glass, and ceramic, to attach to metal surfaces. Combined with a metal striker, this magnet is ideal for closure mechanisms in cupboards, window shutters or doors.

Countersunk Pot Magnets Dimensions

Model	ø D (mm)	ø d1 (mm)	ø d2 (mm)	H (mm)	Holding Force (kg)
EN-A16	16	3.5	6.5	5	5
EN-A20	20	4.5	8.5	7	6
EN-A25	25	5.5	10.4	8	14
EN-A32	32	5.5	10.4	8	25
EN-A36	36	6.5	12	9	29
EN-A42	42	6.5	12	9	37
EN-A48	48	8.5	16	11.5	68
EN-A60	60	8.5	16	15	112
EN-A75	75	10.5	19	18	162

EN-B Series

Neo Pot magnet flat with ring magnet

They are assembled with a NdFeB ring magnet and soft steel cover. The Neodymium magnet can be Nickel or Zinc plated and the steel cover can be Nickel, Zinc, or Chrome plated. This magnet with a non-threaded hole are commonly used with bolts to positioning the magnet.

This magnet is especially ideal to heavy-duty industrial or commercial applications in cases that the attachment needs to be stronger than screws and harder to dislodge. It can accommodate nut and bolt attachments that are unlikely to loosen under vibration, physical pressure, or other duress.

Note: Washers are recommended when bolts are used for attaching a magnet to help prevent the magnet loosening and being displaced.

Neodymium Pot Magnets with Ring Magnet Dimensions

Model	ø D (mm)	M (mm)	ø d (mm)	H (mm)	Holding Force (kg)
EN-B16	16	3.5	6.5	5	4
EN-B20	20	4.5	8	7	6
EN-B25	25	5.5	9	8	14
EN-B32	32	5.5	9	8	23
EN-B36	36	6.5	11	9	29
EN-B42	42	6.5	11	9	32
EN-B48	48	8.5	15	11.5	63
EN-B60	60	8.5	15	15	95
EN-B75	75	10.5	18	18	155

EN-C Series

Pot magnet flat with threaded neck

They are assembled with a NdFeB disk magnet and soft steel cover w/bolt on the top. The two parts are bonded together with epoxy. The Neodymium magnet can be Nickel or Zinc plated and the steel cover can be Nickel, Zinc, or Chrome plated. This magnet with male thread is designed to be used with a washer and nut.

The external thread allows the magnets to be fastened to any material with a pre-drilled hole. This magnet is popular in construction, civil engineering, mining, and agriculture settings.

Neodymium Pot Magnet with Male Threaded Neck Dimensions

Model	ø D (mm)	M (mm)	L (mm)	H (mm)	Holding Force (kg)
EN-C16	16	4	8	5	5.5
EN-C20	20	4	8	7	9
EN-C25	25	5	9	8	22
EN-C32	32	6	10	8	34
EN-C36	36	8	10	8	41
EN-C42	42	8	11	9	68
EN-C48	48	8	12.5	11.5	81
EN-C60	60	10	15	15	113
EN-C75	75	10	19	15	164

EN-D Series

Pot magnet flat with internal thread

close up of neo pot magnet flat with internal head

illustration of neo pot magnet flat with internal head

They are assembled with a NdFeB magnet and soft steel cover with internal thread.
The NdFeB magnet can be Nickel or Zinc plated and the steel cover can be Nickel, Zinc or Chrome plated, and the gap filled with a plastic ring. This magnet with a threaded hole is commonly used with bolts to positioning the magnet. The female thread can accommodate a bold, threaded bar, an interchangeable eyelet or hook accessory.

This magnet is ideal for suspending lighting or electrical cabling in construction areas. And this makes it popular amongst tradespeople who perform remedial or on-site repair work. This magnet is also great for temporary stalls and exhibits in markets.

Neodymium Pot Magnet with Internal Male Threaded Neck Dimensions

Model	ø D (mm)	M (mm)	H (mm)	Holding Force (kg)
EN-D16	16	4	5	4
EN-D20	20	4	7	6
EN-D25	25	5	8	14
EN-D32	32	6	8	23
EN-D36	36	8	8	29
EN-D42	42	8	9	32
EN-D48	48	8	11.5	63
EN-D60	60	10	15	95
EN-D75	75	10	15	155

EN-E Series

Pot magnet flat with screwed bush

They are assembled with a NdFeB disk magnet and soft steel cover with tap bolt on the top. The two parts are bonded together with epoxy. The Neodymium magnet can be Nickel or Zinc plated and the steel cover can be Nickel, Zinc, or Chrome plated. This magnet with a female thread is designed for screwing brackets into.

Neodymium Pot Magnet with Internal Male Threaded Neck Dimensions

Model	ø D (mm)	d (mm)	M (mm)	L (mm)	H (mm)	Holding Force (kg)
EN-E16	16	6	4	8	5	5.5
EN-E20	20	8	4	8	7	9
EN-E25	25	10	5	9	8	22
EN-E32	32	10	6	10	8	34
EN-E36	36	10	8	10	8	41
EN-E42	42	12	8	11	9	68
EN-E48	48	12	8	12.5	11.5	81
EN-E60	60	14	10	15	15	113

EN-F Series

Pot magnet flat with a hook

They are assembled with a NdFeB disk magnet and steel hook on the top. The Neodymium magnet can be Nickel or Zinc plated and the steel cover and hook can be Nickel, Zinc or Chrome plated. This magnet is ideal for holding cables away from a working area temporarily.

The hook attachment makes this magnet ideal for indoor or outdoor handing. This magnet is ideal for storing equipment, displaying products, or suspending items to prevent tripping hazards. The non-permanent mounting eliminates the need for screws or glue to be used on work trucks, campervans, fishing boats and trailers.

Neodymium Pot Magnet with Hook Dimensions

Model	ø D (mm)	M (mm)	Holding Force (kg)	Weight (g)
EN-F16	16	4	5.5	11
EN-F20	20	4	9	21
EN-F25	25	5	22	37
EN-F32	32	6	34	56
EN-F36	36	6	41	68
EN-F42	42	6	68	97
EN-F48	48	8	81	154
EN-F60	60	8	113	282
EN-F75	75	10	164	560

EN-G Series

Pot magnet flat with an Eye blot

close up of a neo pot magnet flat with eye blot

illustration of a neo pot magnet flat with eye blot

They are assembled with a NdFeB disk magnet and steel eye bolt on the top. The Neodymium magnet can be Nickel or Zinc plated and the steel cover and eyebolt can be Nickel, Zinc, or Chrome plated. The eyelet is ideal for the safe mounting of objects. The eyelet can be removed if required.

The eyelet attachment helps to organize and suspend cables, ropes, lighting, and any other holding and hanging applications in industrial, construction, and domestic settings. The attachment makes this magnet a very practical tool to improve safety and efficiency in the workplace.

Neodymium Pot Magnet with Eye Blot Dimensions

Model	ø D (mm)	M (mm)	Eye Bolt Size	Holding Force (kg)	Weight (g)
EN-G16	16	4	M 4 x 10	5.5	11
EN-G20	20	4	M 4 x 10	9	21
EN-G25	25	5	M 5 x 10	22	37
EN-G32	32	6	M 6 x 15	34	56
EN-G36	36	6	M 6 x 15	41	68
EN-G42	42	6	M 6 x 15	68	97
EN-G48	48	8	M 8 x 20	81	154
EN-G60	60	8	M 8 x 20	113	282
EN-G75	75	10	M 10 x 20	164	560

EN-H Series

Pot magnet flat

They are assembled with a NdFeB disk magnet. The Neodymium magnet can be Nickel or Zinc plated and the steel cover and hook can be Nickel, Zinc or Chrome plated.

Neodymium Pot Magnet Flat Dimensions

Model	ø D (mm)	H (mm)	Holding Force (kg)
EN-H16	16	4.5	9.5
EN-H20	20	6	14
EN-H25	25	7	20
EN-H32	32	7	35
EN-H45	45	7	20

Uses of Neodymium Pot Magnets

Neodymium pot magnets are ideal for closing mechanisms and concealed placements, like cabinet doors, drawers, gate latches, and door holdings. They are also great for attaching shelves, signage, lighting systems, and window displays in shop fittings. These magnets are also helpful for various activities in workshops and in industry, such as holding workpieces during welding, cutting, milling or drilling.

Pot magnets can be made with a tapped hole, a countersunk hole, a counter-bored hole, a threaded stud, a threaded collar, a hook or an eyebolt for mounting and hanging a range of ferrous items.

Neodymium magnets have a high magnetic strength to size ratio for applications in limited spaces as the casing confine the magnetism to one face only. This concentrates to give the maximum holding force possible for the size of the magnet.

As neo pot magnets lack moving parts and feature a protective casing, the life of the magnet is almost unlimited with minimal maintenance required. A clean surface for the magnet side can help to guarantee reliable operation over a long time.

Note:

The rated holding force is when contact directly against mild steel 3mm thick or greater. The listed holding force is for horizontal holding (of a 3mm thick steel surface). If the magnets are positioned vertical, it is recommended to divide the holding force by 3 to counter the change in gravity and reduced friction.

The magnetic strength will be weaker if the ferrous item to be attached is an alloy, stainless steel, colourbond steel, painted, oily, rusty, or rough. If the item is thin, such as foil and sheet metal, the holding force will be negatively impacted. If any objects are in between the magnets and the item, the magnetic force will be reduced as well.

Features of Neodymium Pot Magnets

Before choosing holding pot magnets, here are the details you should understand:

Appearance of Neodymium Pot Magnets

The magnets are encapsulated within a protective metal casing on all but one side. The protective casing helps pot magnets to withstand continual impact onto a steel surface without the risk of chipping or cracking the magnet.

Dimensions of Neodymium Pot Magnets

The dimensions for Pot Magnets are measured by diameter and height. The details of features included in our standard Pot Magnet range are also included in the tables below. Customized Pot Magnets are also available.

Magnetism of Neodymium Pot Magnets

The protective steel casing of a pot magnet will force both magnetic poles out of the exposed face. The holding force in kilograms are included in the tables below.

Magnetic Work holding Squares

Our on/off magnetic workholding squares with 65kg – 450 kg holding capacity. For use in welding, woodworking or anywhere steel is used. The Squares exert a strong magnetic hold on 3 sides, and provide fast and easy multi-plane workholding for positioning steel. They are ideal for fixturing and offer many uses: level sheet, support, stop, guide, mounting base; the uses are endless. A must for every fabricator and welder.

Versatile on/off magnetic workholding Square. Incredibly strong fast set ups, precise positioning machined at 90 degrees.
Features pre-tapped holes on all sides for mounting tools, jigs and fixtures.
Mounts anywhere with no limitations like clamps. Magnetic grip on 5 sides. Holds flat and round steel.
Use as a guide, stop or to secure steel, level sheets, destack capability.

close up of magnetic work holding squares

a table on the dimension, holding value and weight of magnetic work holding squares

Magnetic couplings

A magnetic coupling is a coupling that transfers torque from one shaft to another, but using a magnetic field rather than a physical mechanical connection.
Magnetic couplings are of considerable interest for many industrial applications because they can transmit torque from a primary driver to a follower, without mechanical contact. In particular, as they allow torque to be transmitted across a separation wall, axial permanent magnetic couplings (APMCs) are well suited for use in isolated systems such as vacuums or high-pressure vessels.

Magnetic couplings are most often used for liquid pumps and propeller systems, since a static, physical barrier can be placed between the two shafts to separate the fluid from the motor operating in air.

Halbach array

A Halbach array is a special arrangement of permanent magnets that augments the magnetic field on one side of the array while cancelling the field to near zero on the other side. This is achieved by having a spatially rotating pattern of magnetisation.
The rotating pattern of permanent magnets (on the front face; on the left, up, right, down) can be continued indefinitely and have the same effect. The effect of this arrangement is roughly similar to many horseshoe magnets placed adjacent to each other, with similar poles touching.

Linear Halbach arrays

Applications

this device is also a key component of the Inductrack Maglev train and Inductrack rocket launch system. Wherein the Halbach array repels loops of wire that form the track after the train has been accelerated to a speed able to lift.

The simplest example of a one sided flux magnet is a refrigerator magnet.

Halbach cylinder

A Halbach cylinder is a magnetized cylinder composed of ferromagnetic material producing (in the idealized case) an intense magnetic field confined entirely within the cylinder with zero field outside. The cylinders can also be magnetized such that the magnetic field is entirely outside the cylinder, with zero field inside.
These cylindrical structures are used in devices such as brushless AC motors, magnetic couplings and high field cylinders.

Magnetic flux density graph of a halbach cylinder

Magnetic assemblies

ESSEN manufactures hundreds of magnetic assemblies and magnetic products for a wide variety of industrial applications using Rare Earth magnets, Ceramic magnets and Electromagnets. We offer standardized magnetic assemblies supported with custom solutions to fit your unique lifting and work holding needs.

Close up on small magnetic assembly products

Other Manget Products

As an industrial magnet manufacturer, Essen Magnetics produces rare earth magnets, magnets for motor, and metal injection molding for different industrial applications. We also offer customized production for individual use cases.

Magnetic Assembly

Magnetic Material