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Registered Member #2321
Joined: Fri Aug 28 2009, 05:13PM
Location: Boston, MA
Posts: 34
Hey fellas,
I want to make a high current PSU out of this freshly gutted MOT. It's got 4 deep welds on each side about 2mm thick so it'll be quite an effort with a hacksaw.
The biggest challenge is drilling the welds on the base as I have already broken one drill bit trying.
I know the easiest way is probably to just cut the secondary but I kinda want to preserve all that precious wire :)
I'm looking for suggestions from anyone who's attempted this arduous task before.
Registered Member #1806
Joined: Sun Nov 09 2008, 04:58AM
Location: USA
Posts: 136
Angle grinder. Cutoff wheel; HF has them. They're about 1/16" thick. Makes great cuts. Wear ear, eye, and lung protection when using cutoff wheels.
Don't use a grinding wheel. Those are thick and abrasive on the face as well as the edge. A cutoff wheel is thing and only abrasive on the edge; the face is only minimally abrasive.
Use the edge of the cutoff wheel (as if it is rolling along on the bottom side of the mot) to cut thru the welded metal.
Registered Member #540
Joined: Mon Feb 19 2007, 07:49PM
Location: MIT
Posts: 969
You don't really need to remove the base that is welded to the I section. They don't interlock the EI sections so you can just take a hacksaw to the welds and pry the core apart.
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MOT base weld removal
