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Posted By

BETTY THOMAS (San Antonio, TX)

Category

General Contractor

Posted Date

2/6/2018 12:00:00 AM

Forum Title

Drilling Stainless Steel

Guys.... I've got a SS bar sink with just two 4 center set faucet holes. I need to mount a single hole center faucet, so I need to drill a 1-3/8 center hole in the sink.Before I rip it up with experimentation, looking for your experience recommendation as to best bits/technique in drilling it... and not ripping it up. I can't pull the sink, nor can I get any backing behind the faucet hole for drilling it. I have no idea of the grade of SS, it's probably just a normal builders grade SS bar sink. I've drilled SS with my cobalt twists before, but I need a 1-3/8 hole. I'm sure my regular hole says won't do it, I do have my tile carbide grit hole saw.... but I don't want to experiment untill I know I won't rip it up. Presently only have as biggest a 1 step bit.... but I suppose I can find locally a 1-3/8 step if that is a good approach. Thought about drilling outside circle with cobalt twists and fileing smooth, but that just does not sound clean or practical. Hope I don't have to order a specialty bit on the internet and wait on this, nor excessive expense for this that I probably won't run into again. TIA for any recommendations Best Peter EDIT PS:I don't have any greenlee knock-out punches (Usually use my step bit when I need it).
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