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Lifting Magnets
There are many advantages for selecting and using a lifting magnet; the significant advantages are that they really are effortless to operate and maintain, offer a cost effective technique to lift ferro-magnetic objects, they can be installed and utilized by an individual person, and they may be employed in nearly all locations since lifting magnets are simple to transport {Lifting magnets are usually utilised in the steel business, or wherever steel is often handled, particularly, steel plate; lifting magnets are in addition utilised in locations including ship yards, scrap yards, workshops, and for the construction of jigs and fixtures. Lifting magnets are in general presented with safe working load limit capacities up to 2000kgs, and are often used along with an electric or manual hoist or crane, where the lifting magnet hooks onto the load hook.|A permanent lifting magnet is normally used along side a crane or hoist of some variety; the magnet merely hooks over the hoists load hook. Lifting magnets are employed in a vast array of operations, although most commonly inside the steel business intended for lifting steel plate; they are however also regularly observed in ship building yards, scrap yards, warehouses and workshops. Permanent lifting magnets are generally obtainable in various capacities, often upto 2000kgs.} Permanent lifting magnets work by manual operation and are generally used individually as they can't be operated at a distance. These magnets create a very strong but low magnetic field so as a result they might be sensitive to air gaps between the magnet and the load; this usually means that when the air gap increases, the magnetic force is going to be significantly reduced, and therefore they will work much better on smooth, flat surfaces other than rough and irregular ones . Air gaps transpire in a substantial number of different ways such as paint, dust, and heavy mill scale. Badly machined surfaces also constitute an air gap, hence in these conditions the magnet will need to be down rated . Full lifting capacity can only be accomplished when the magnet makes full contact with the material being lifted. Because of this it is always highly recommended to perform a trial lift to ensure the load is secure before the full lifting of the load. Several materials have different capabilities to carry magnetism. For materials other than mild steel a reduction factor needs to be applied that allows you to work out the effective clamping force. TYPICAL VALUES: Ferrous alloy steels: 0.8 EXAMPLES OF REDUCED SWL: Mild steel 500g High carbon steels: 0.7 Cast iron 500g x 0.55 = 275kgs Cast iron: 0.55 The thickness of the material to be lifted is also a further crucial factor to think about when selecting a lifting magnet, since when they are used to lift steel plates that are thinner than the suggested minimum thickness then the clamping forces are going to be drastically lowered. Permanent lifting magnets are exceedingly simple to use, first the magnetizing lever must be in the off position, then lay on the load, remembering to take in to account the load material, possible air gaps and therefore a reduction in capacity . Whilst the magnet is in the right spot (this should be in line with the centre of gravity) then the magnetizing handle should be placed into the on location, the load will now be magnetized and able to lift, remember to undertake a trial lift initially. When the lift is accomplished, and the load has been placed completely and safely down, then the hand lever can be moved to the off position to release the load. Allow me to share some essential recommendations for the correct and safe operation of a permanent lifting magnet; Lifting magnets are designed to lift, lower and horizontally transport sheet, flat and round steel and in addition can be fitted to any ferro-magnetic steel item. A load held with the lifting magnet shouldn't be left unattended for extended periods. You must always raise, lower and move loads little by little and carefully if longer sheets of steel are to be used it might be required to use two magnets to avoid swinging or deflection of the load. In this case the magnets need to be used in conjunction with a spreader beam. Always ensure that the crane or hoist hook is an appropriate shape and size for the suspension eye on the magnet. It is also imperative to note the safe working load limit and on no account exceed it. You should never lift or transport loads at the same time as any individuals are in the lifting zone, nor permit people to pass below a suspended load. During the moving of the load make sure the load will not swing or bang other items, be sure the path is clear before lifting. Never de-magnetize the magnet before the load has been entirely set down, and do not magnetize the magnet before the load has been attached. Whilst lifting round materials like pipes etc. As they won't make full contact with the magnet then the capacity will be lowered. It needs to be noted that these permanent lifting magnets must never be used near medical units, and individuals with pacemakers, or insulin pumps. Major inspections as well as servicing of lifting magnets is required to be administered on a yearly basis, yet it is advisable to look at the magnet prior to each operation, to check for any flaws for example cracked housing or workings, defective or loose hand levers and suspension eyes, and the lifting contact surface must be clean. Additionally it is common practice to examine the load to be lifted for any dust or debris, and rough or uneven surfaces that may create an air gap therefore a reduced capacity. I hope that this informative article has offered some helpful information about why, how and when to use a permanent lifting magnet. Article Directory: http://www.articledashboard.com Lifting Gear Direct has been providing trade and industry with lifting magnets, magnet lifters, permanent magnet lifters for many years and also offer a full repair service. For more information please visit our web site for more lifting gear products. Or lifting equipment |
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