Are you aware there are deep field and shallow field Lifting Magnets available?

Deep field (Passive Shunting) Lifting Magnets have been used for many decades in Australia. In the last ten years shallow field (Active Shunting) Lifting Magnets have been gaining in popularity.

To understand why; we need to look at the differences and what that means in the workplace:

Deep field magnets are generally durable robust pieces of equipment, but many people are not aware that they will only lift their advertised capacity at the depth of their magnetic field.

This depth varies between sizes. An average a 500kg Pro-Lift Magnet has a 40mm deep field. This means it is only rated to lift 500kg if the material you are handling is 40mm thick. If the material is 20mm thick this 500kg magnet is rated to lift 350kg.  A 1-tonne deep field magnet typically has a 60mm deep field, so on 20mm material thickness, it is rated to lift 350kg which is the same as a PML 500kg magnet.

A shallow field magnet rated to lift 400kg has a 12.7mm deep field so it can lift 400kg of 12.7mm material. When you are handling 20mm plate it is still rated to lift 400kg.

Interestingly, most deep field magnets are not rated to lift material less than 10mm thick while many shallow field magnets are rated on material as thin as 0.5mm thick.

So, what that means in the workplace when you are using deep field magnets, is there is more potential to mismatch the magnet to the load.

A mismatch like using a 1-tonne Pro-Lift with a 60mm field to lift 15mm plate will result in the lever being very hard to actuate and very hard to turn off. The lever will be very forceful on release resulting in a risk of wrist injuries.

Furthermore, a calculation is required by the operator to ensure the magnet is rated to lift the material at the given thickness.

Using a shallow field magnet on material from 0.5mm to 25mm thick will ensure that the levers actuate in a gentle manner, reducing potential wrist injuries while reducing the risk of operator error due to misunderstanding their magnets capacity on various thickness’s.

At MSA we supply both types and are looking forward to offering advice on which type suits your requirements.

Active & Passive Shunting Technology

Hand Injuries

Many Australian companies have a strong focus on reducing hand and wrist injuries. They may be interested in an Active Shunting Magnet due to it’s more gentle actuation. Deep Field Magnets can be quite forceful when being turned on and off, particularly when it is operating too far from its maximum magnetic saturation thickness. For example, a 3-tonne Passive Shunting Lifting Magnet is not rated for use below 30mm and is a happier operation in the 50mm-80mm range.

The other reason Active Shunting Magnets are good at preventing hand injuries is to have no residual magnetism. This eliminates the requirement to remove swarf and grit from the bottom of the magnets between lifts thus reducing the risk of laceration type hand injuries.

Do you intend to lift material less than 10mm thick?

If so, be aware that many Passive Shunting Magnets are not rated for it. The two main reasons are that you have to apply so much force to the handle that the magnet can be damaged and once the magnet is actuated, so much of the flux is wasted below the sheet metal.

De-stacking

If you’re using the magnet to lift sheet or plate off a stack, you’re most likely better off with a Shallow Field to reduce the chance of picking up multiple pieces.

Preventing damage to Materials

Does the material have to be handled carefully to reduce the risk of scratching it? If so an Active Shunting Magnet with zero Residual Magnetism is the way to go. See our video on Residual Magnetism for more detail on this.

Handling billet or very thick steel 40-80 mm plus

A Passive Shunting Magnet is usually a good choice and really come into their own here. Just ensure that the magnet has a two-action control that prevents accidental discharge as per the Australian standard. We see many for sale in Australia that doesn’t.

We are not playing favourites here, we highly recommend our Passive Shunting Prolift range, they are robust and dependable. We also really like the Active Shunting Magswitch products for their technology and all the solutions they offer.

At MSA we want to see the right magnets used for the job, safely and at the best price whether it’s a Prolift or Magswitch MLAY.

Contact MSA today for advice on selecting the right Lifting Magnet for your application.

Lifting magnets will achieve different hold forces depending on the thickness of the steel it is in contact with.

Some magnets are geared towards lifting thin material (Active shunting) and some thicker material (Passive Shunting).

Let’s look at how the two compare at the midrange thicknesses we commonly handle in Australia:

The active shunting Magnets are more likely to lift the number on the side of the magnet as they waste less flux due to the more efficient circuit. This reduces the risk of operator error.

Contact MSA today for advice on selecting the right Lifting Magnet for your application.

Passive shunting Magnets achieve their full hold force between 30mm – 80mm thick while most Active Shunting Magnets are achieving their full hold force between 9mm and 20mm. This is the range of thicknesses that are most commonly handled.

What that means is that at some thicknesses of an enormous Passive Shunting Magnet has less hold force than a small Active Shunting Magnet.

With that in mind, let’s compare some costs of the two types based on lifting material from 10-40mm thick.

Note: We are not including material thickness less than 10mm as most Passive Shunting Deep Field Magnets are not rated for it.

 

Some takeaways from this are that using a powerful Passive Shunting Magnet on thin material is expensive and that using smaller Shallow Field Magnets on 10mm and 20mm material can be an economical option.

It’s important to consider that selecting the magnet best suited to the thickness of materials you intend to handle, reduces the risk of operator error.

Contact MSA today for advice on selecting the right Lifting Magnet for your application.

Ever heard of Residual Magnetism? What is it, and how does it affect your Lifting Magnets?

Residual Magnetism occurs when a magnet fails to turn completely off. The magnetic flux is a result of a circuit being created between the rare earth magnets inside and the steel body of the magnet. The level of Residual Magnetism depends on the Shunting Technology and the overall design of the magnet.

These next 3 magnets are a good example of Residual Magnetism found in lifting magnets and why magnets with no Residual Magnetism are the safest option:

Extreme Residual Magnetism

 

 

Low Residual Magnetism

 

 

No Residual Magnetism

 

 

MSA Pro-Lift and Magswitch Lifting Magnets are designed to have a clean break of magnetic flux at the OFF position. We ensure the highest industry safety standard of our industrial Lifting Magnets while making sure they are easy to use!

Click here to watch the video now! Need a better understanding? Contact our magnet experts today.

These MSA Magnetic MIG & TIG Torches are a must-have for your welding station! They can be fixed to the welding bench or work surface to allow convenient and handy torch location.

 

MSA Magnetic MIG-Mate:

MSA Magnetic TIG-Mate:

Contact our friendly team today, or purchase your magnetic torch holder instore or online.

MSA Magnetics provides a wide range of tools to improve the safety, efficiency, and productivity of industrial operations in the metal fabrication, lifting, and woodworking industries. The Magswitch magnets have many advantages, ranging from safety benefits to reducing downtime. These switchable magnets also have durability and speed on their side.

More and more companies are looking to reduce hand injuries by prohibiting employees and contractors from using their hands to guide loads around their factories and trucks. As this “No-Touch” Policy has become mainstream, MSA Magnetics has been approached by many companies to supply No-Touch Tools for guiding steel objects under load.

MSA’s No-Touch Tools allow the performer to work safer and be more productive as the tools help save hand and back injuries, and save time! The line-up consists of:

Magswitch Extenda-Lifts: Allows users to pick up and move hot, sharp, and dirty steel without bending over and using their hands.

Magswitch Hand Lifters: Ideal for small steel handling, dragging sheet, picking, placing and pulling parts out of burn table or handling scrap, without using your hands.

 

Magswitch MagDolly: This product has large solid rubber wheels and is suited to lift and carry sheet, pipe or any steel object over a greater distance. Again, no need to bend over or use your hands.

 

The range doesn’t end there… We are the industrial magnet experts. If your requirements have anything to do with magnets, we can provide the solution that works – Contact us today!

For efficient extraction of ferrous and tramp metals from conveyed product streams.

Suited to non-food related industries such as recycling and mining, overbelt and suspension magnets offer a safe, efficient, and effective method of removing ferrous tramp and iron pieces. The magnets are installed above conveyed product streams and extract contaminating ferrous and tramp metal as the belt proceeds past – thus improving product purity and reducing equipment damage.

Commonly extracted ferrous contaminants from these types of installations include nails, screws, nuts, bolts, wire, chain, hammers, and crowbars – all of which can cause thousands of dollars in equipment damage if not removed early in the process.

Advantages:

 

Cost benefits:

 

Industries suited:

 

Installation:

Overbelt and suspension magnets can be installed over the top of the conveyor (cross-belt style) or at the end of the conveyor at discharge location (inline style).

ELECTRO OR PERMANENT MAGNETS

Overbelt and suspension magnets are available in either permanent magnetic or electromagnetic designs. Each design has its own benefits and can include quick or self-cleaning methods.

 

ADVANTAGES OF ELECTRO-MAGNETS ADVANTAGES OF PERMANENT MAGNETS
  • Stronger magnetic field
  • Easy to clean
  • Can handle a heavier burden of material
  • Suited to high-tonnage, fast-flowing belts
  • Suited to deep troughed conveyors
  • Less expensive than electromagnets
  • Low install & operating costs
  • No power source required to operate
  • No electrical maintenance

 

OVERBELT MAGNETS

Overbelt Magnets consist of a magnet box surrounded by a continuously moving belt. The magnet is installed above the product stream conveyor, either mid-stream or at the conveyor discharge. As the product stream travels under the overbelt magnet, ferrous and tramp iron pieces are extracted and retained to the magnetic belt. The belt proceeds around the overbelt magnet housing. When it reaches the point at which it is no longer affected by the magnetic field, the collected metal is discharged and dropped off into collection bins.

Overbelt Magnets are popular due to their self-cleaning operation, which allows interrupted metal extraction and eliminates the need for operator cleaning schedules. They are also suited to applications where the typical level of ferrous contamination is high.

 

SUSPENSION MAGNETS

Suspension Magnets are a much simpler design than Overbelt Magnets. They consist of a block magnet (square, rectangular, or round) suspended above the conveyor with chains. The magnet face is positioned directly above the product stream, either cross-belt or inline (above conveyor discharge).

Regardless of whether Suspension Magnets are of permanent or electromagnetic design, there is usually manual labor involved in the cleaning process. The magnet must be shifted away from the conveyor before the collected metal is removed, otherwise, it may drop back into the product stream and cause recontamination. Because this manual labor is required, Suspension Magnets are typically selected for applications where the level of ferrous contamination is low and only occasional cleaning is required.

 

MAGNETIC PULLEYS

MSA also supply complete new magnetic pulley systems and magnetic pulley lagging for existing pulley magnets. These systems are installed at the discharge terminus of a conveyor and are used to effectively separate magnetic contaminants from the main non-magnetic product stream.

 

QUALITY AUSSIE-MADE MACHINES

Overbelt and Suspension Magnets available from MSA are high-quality, durable machines manufactured in Australia. They conform to current engineering standards and best practices. They are designed to provide low maintenance, effective metal separation.

Contact our magnet experts today for your magnetic needs!

MSA FRAS CABLE-MATE MAGNETIC LEAD HOLDER

The new FRAS Cable-Mate is a high temperature and heavy-duty version of our standard Cable-Mate Magnetic Lead Holder.

 

The MSA FRAS Cable-Mate features a high-strength rare earth magnet which will hold to any magnetic steel surface. Simply attach the magnet to the magnetic surface and direct your cables and leads through the yellow strap.

 

Part #:  MSAFRCM10
Supports: 
6+ cables
Support Weight: 
25kg 
Dimensions: 
100mm W x 220mm H

Buy online or contact our friendly team for further information!

The MSA Magnetic Brooms & Sweepers are the ideal solution for safe, fast, and easy collection of swarf!

Magnetic swarf is a problem that most of us experience. Not only is it a mess on your factory floor, but it can also cause a lot of harm. Objects can get into product lines, puncture tyres, and even injure personnel. MSA provides a large range of magnetic broom solutions – from light brooms for general use to heavy-duty sweepers for large-scale operations.

MAGNETIC FORKLIFT SWEEPERS

MSA Magnetic Forklift Sweepers are powerful, permanent magnets ideal for the removal of sharp iron objects from roads, parking areas, loading docks, and other important traffic areas – greatly reducing the risks of costly damage to tyres and injuries by nails, scrap iron particles, staples, etc.

 

To remove collected fragments, simply pull the handle on the top of the sweeper and metal fragments will drop off.

MAGNETIC SUPER SWEEPERS

Cleans in an instant – a real industry favourite!

The Super Sweeper is the quick and easy option for removing metal pieces such as nuts, bolts, rivet ends, screws, drillings, and swarf from workshop and factory floors.

So if you are sick of tyre punctures, you can learn more or purchase these magnets here…or you can contact our friendly team here if you have any questions.