Benefits of non-electric switchable magnetic clamps
Since at least the 1960s, there have been various methods for activating or switching permanent magnets on and off for steel clamping or holding duties.
Early types generally used Alnico magnet elements. Since the advent of rare earth magnet materials and their progress to mass production in the 1980s, there have been significant strides made in both technology and clamping strength.
This is reflected in the number of patents for switchable permanent magnetic devices.
Among the most improved of these is the method used by Industrial Magnetics Incorporated (IMI) in their Mag-Mate series of switchable magnetic clamps, squares and work-holders. These small, compact units in several sizes have an amazing clamping strength of up to 450 kgs, and are distributed in Australia exclusively by Serpent & Dove—Applied Magnetics Pty Ltd directly or through their reseller network.
Among the benefits of these devices is their portability and freedom from any electric power requirement.
Clamping strength and versatility are the major considerations when choosing switchable magnetic clamps, and the Mag-Mate series provides the greatest clamping strength as well as more versatility in application than other available technologies. For example, the Mag-Mate Switchable Welders Squares are capable of securing a flat steel plate on five sides and round steel on three sides.
Switchable permanent magnetic clamps require no electric power or batteries and depend entirely on the clever manipulation of rare earth magnet elements to direct the magnetic flux to the steel pole pieces of the device. They are switched on or off by means of a small lever on top of the device.
The rare earth magnet elements are stable and with normal use lose only 1% -2% of their strength in 100 years. So you can be assured of plenty of use and your money’s worth!