» Fixtures »Magnetic mass of the welding machine from the old speaker

The magnetic mass of the welding machine from the old speaker

Magnetic mass for welding in work

People involved in electric arc welding are familiar with the feeling of annoyance and annoyance that arises from an unexpected interruption of work due to the fact that the mass cable of the welding machine suddenly stops contacting the workpiece. Traditionally, spring "crocodiles" are used for its fastening, whose grip weakens with frequent use.
Standard clamp for the mass of the welding machine

In addition, there are situations when it is simply impossible to attach such a clamp to the workpiece. An alternative to a crocodile clip is magnetic device for attaching the mass cable, which can be done from the old speaker from the radio.

Car radio speakers

A speaker is needed for a large diameter. It is not necessary to dismantle a working radio for its extraction, if you wish, you can find one at the nearest car dump.

Suitable speaker for making magnetic mass

How to make a magnetic mass for welding
It is not difficult to make a magnetic fastening of the mass wire of the welding machine from it. For this:
1. Unscrew the magnet mounting screw located on the back of the speaker.

Unscrew the magnet mounting screw from the speaker

2. Separate the magnet from the structure by simply picking it up with a screwdriver.

Separation of the magnet from the speaker

3. Grind the surface of the magnet to a smooth state using a grinder equipped with a flap disc.

Grinding a magnet surface

4. Disassemble the standard spring clamp of the mass cable of the welding machine and release the end of the wire from it.

Dismantling the standard mass clamp

5. Select a bolt suitable for the diameter of the hole of the cable lemma.

Choosing the Right Screw

6. Insert the bolt into the hole of the magnet.

Insert screw into magnet

7. Assemble the fixture completely.

Assembly of magnetic mass for welding

Final assembly

The result is a convenient magnetic fastening of the mass cable, which has a large area and, therefore, provides sufficient force of its clamp to the surface of the workpiece.

Magnetic mass for assembly welding

When the welding machine is in operation, the magnet of such a device and the mass cable do not heat up, with moderate use, the magnetic mass can last quite a long time.

Magnetic mass for welding in work

Full video version of making magnetic mass from an old speaker.

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2 commentary
spring crocodiles, whose grip weakens with frequent use.

It weakens for the same reason - the mass warmed up and the spring "sat down" ... Only the spring can withstand much more heat than a magnet ...
Once I also did this ... It seems that everything is fine, but ... not for a long time the music played ...))))
Cooked rusty construction. The contact is not very ... The mass has warmed up ... And that’s it! The magnet is no longer a magnet ...

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