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Q: cheapest way to remove bottom of water-heater Answered

hi, i pulled an electric water-heater (about 80 l) out of the trash. want to take the bottom off and convert it in a pot/kettle to do (´cook´ ) laundry over a wood-fire.

i was wondering what would be the cheapest way to do it (i have very few means here)... rotary-tool?, hacksaw-blade?... (dont have a grinder, no blow-torch, no jig)

guess to complete the cut i would use up quite a few of wheels, or, respectively blades (hack).

any ideas? any feedback... all appreciated.

bowing.

Discussions

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Yonatan24

19 days ago

How thick is it? About how hard is the steel? This is the important info.
Angle grinder > jigsaw > hacksaw. A rotary tool won't work with thick steel. But you could cut a bit into the steel to keep a hacksaw blade cutting straight. Hope this helps. If you have a picture that could help.

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la xerraYonatan24

Reply 18 days ago

did make a test-cut with the dremel, looks like 2mm+ thick.... did try some cutting with a hacksaw-blade inside this incision...slooow... will do a test with a fresh blade on the dremel and run it down to the bones... to see how much cutting (cm) i get out of 1 blade (a pack of 36 blades goes for about 3 euro), thanks

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Yonatan24Yonatan24

Reply 19 days ago

Might be also possible to pay a professional to cut it with a plasma cutter.

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VajkF

22 days ago

whatever saw you have. sawzall, jigsaw, angle grinder

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la xerraVajkF

Reply 18 days ago

hand, hand, hand ... well, ok, tiny little dremel gem, too... thanks

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la xerraVajkF

Reply 18 days ago

hand, hand, hand ... well, ok, tiny little dremel gem, too

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Jack A Lopez

22 days ago

I suggest drawing a line, where you want the cut to go. My preferred way to do this, is to use masking tape.
https://en.wikipedia.org/wiki/Masking_tape

That is, I put the tape on the steel. Then I draw a line on the tape. Or maybe draw a line on the tape first. Then put the tape on the steel. The reason I do it that way, is because my usual writing tools, pens and pencils and paper printouts, are not very good at making marks on steel directly.

Other makers will undoubtedly recommend other tools for making marks on steel, e.g. crayons, or soapstone, or markers that mark with paint, or similar.

A hacksaw can be used to make the cut,
https://en.wikipedia.org/wiki/Hacksaw

although it will take a while to do it that way, and it might ruin more than one hacksaw blade.

What is the area of the steel that must be rubbed away? It is a circle about a meter in circumference, multiplied by a thickness of about 3 mm.
(100 cm)*(0.3 cm) = 30 cm^2

A file, the kind used for metal working,
https://en.wikipedia.org/wiki/File_(tool)
or sandpaper,
https://en.wikipedia.org/wiki/Sandpaper
or both, can be used to smooth out the imperfections, after the water heater shell has been cut into two pieces.

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la xerraJack A Lopez

Reply 18 days ago

hey jack, i dont wanna go to the moon, just whack off some boiler-bottom (just kidding, like your style... very pro... me, i am a rigger through and through (or, as they say around here: chapuzero),, and the older i get the more so... thanks

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Downunder35m

22 days ago

Best way to do it is an angle grinder with a 1mm thick cut off wheel.
Use them properly and the last a long time.
For example: Keep the pressure low!
You want the cutting wheel do the work and not your pressure ;)
I bet a single wheel would do you for a 80l tank.

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la xerraDownunder35m

Reply 18 days ago

angle grinder is 1st world... am in the 2.5 world here.... milking the sun with a 300w solar-kit... gracias