How to cut a stainless steel sink?

[weekender7]

I have a commercial stainless steel sink wife wants to use in our mudroom. I need to enlarge the hardware holes to accept the hardware my wife chose. I need to go from 1 1/8" holes to 1 11/4" holes roughly. I tried a jigsaw with a metal blade but that wasn't going to "cut it". Need suggestions on what tool to use.

 

[Gseith]

A step drill bit is what I would use

 

[BadDogPSD]

I think a reamer bit would be your best bet.

 

[Btaylor]

Tell her to pick different hardware. Put a helmet and cup on first.

 

[slvrslngr]

Dremel with a grinding stone

 

[Backyard]

You could use a hole saw, or a step drill if you can find one that big. Either way use lower RPM and a coolant or cutting oil of some sort. You would need a proper sized pilot for the hole saw tho or it would end up walking all over.
Greenlee also makes a manual punch for use in the field. Not cheap tho for one use only.


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[IdahoBeav]

If you're only enlarging it by 1/8", use a die grinder with a round cutter or stone. Trace the extents of the new hole, and use a circular motion with light pressure to grind the edges until you hit the marking.

 

[nrh6.7]

Step bit for sure. I know Milwaukee makes one that goes to 1 3/8". Probably the easiest and cleanest way to go.

 

[11boo]

That stuff is harder than Chinese algebra. Step bit, cutting oil. Slow.

 

[MallardSX2]

I stopped doing silly things that took me forever and I finally got me a cheap Plasma Cutter. It was love at first sight. I use the hell out of that thing.

Make you a template out of a clip board and center the circle and your done in 30 seconds with all of the holes...and if you mess up you can try out your tig abilities at fixing things lol.

https://www.amazon.com/Flameweld-Plasma-Cutter-Welder-Machine/dp/B0BBPYV3SB/ref=sr_1_7?crid=3ML2R8L1JXH9H&keywords=plasma%2Bcutter%2Bpilot%2Barc%2Bstick%2Bwelder&qid=1696510389&s=hi&sprefix=plasma%2Bcutter%2Bpilot%2Barc%2Bstick%2Bwelder%2Ctools%2C94&sr=1-7&th=1

 

[doc holiday13]

Step bit for sure. I know Milwaukee makes one that goes to 1 3/8". Probably the easiest and cleanest way to go.

If thats the case then yeah. that would be the ticket. Step bits self center

Other method would be to have a 1-1/8 hole saw and a 1-1/4" hole saw. Cut a 1-1/8" hole in a piece of 2x4 . Use that wooden plug as your guide to stay centered when you cut the 1-1/4" hole

 

[Yoder]

If thats the case then yeah. that would be the ticket. Step bits self center

Other method would be to have a 1-1/8 hole saw and a 1-1/4" hole saw. Cut a 1-1/8" hole in a piece of 2x4 . Use that wooden plug as your guide to stay centered when you cut the 1-1/4" hole

That is genius. I will definitely use that in the future.

 

[Beendare]

That stuff is harder than Chinese algebra. Step bit, cutting oil. Slow.

Agreed,good advice.

its counter intuitive but slow is your friend when drilling and cutting stainless

 

[grfox92]

If thats the case then yeah. that would be the ticket. Step bits self center

Other method would be to have a 1-1/8 hole saw and a 1-1/4" hole saw. Cut a 1-1/8" hole in a piece of 2x4 . Use that wooden plug as your guide to stay centered when you cut the 1-1/4" hole

I thought I invented that technique.

I should have patent it...

To the OP, step bit, what doc said, or a Dremel or diegrinder.

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[nrh6.7]

Other method would be to have a 1-1/8 hole saw and a 1-1/4" hole saw. Cut a 1-1/8" hole in a piece of 2x4 . Use that wooden plug as your guide to stay centered when you cut the 1-1/4" hole

That is a great work around if you don't have a step bit, which are kinda expensive anyways.

 

[geterdone]

I have seen a pilot bit for hole saws that accepts a inner and outer hole saw, use the inner for your pilot and outer for the enlarged hole size. Going up 1/8" might be too small of a change for that pilot to work.

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[displacedtexan]

I hate step bits.

This is a job for a step bit.

 

[GSPHUNTER]

Which ever method u chose, use Tap Magic as the lubricant. I would use small diamond drum grinder.

 

[Tjdeerslayer37]

That is genius. I will definitely use that in the future.

in some cases you can also nest one hole saw into another and use it to guide you

 

[Azone]

Die grinder.