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I need to drill out a 32mm hole in a stainless steel bar (4 - 6mm) What is the best type drill bit for a normal combi 18v drill.
Discuss Best drill bit for stainless steel in the Plumbing Tools area at PlumbersForums.net
Hss very slowly with plenty of oil start off with a small dia and work your way up to about half dia, then go for it , nice new sharp drill loads of oil. How many are you doing ? there are electro magnetic type bench drills you can hire for site work. centralheatkingTct but you can make do with a bi metal hole saw and some cutting oil but speed 1 and take your time prob around 20-30 mins a hole
Ok cool thanks I like the sound of this. So basically a hole saw but for metal instead of wood, and then you get different sizes instead of just one.Tct but you can make do with a bi metal hole saw and some cutting oil but speed 1 and take your time prob around 20-30 mins a hole
mate it’s just one for a monobloc tap.Hss very slowly with plenty of oil start off with a small dia and work your way up to about half dia, then go for it , nice new sharp drill loads of oil. How many are you doing ? there are electro magnetic type bench drills you can hire for site work. centralheatking
Ok cool thanks I like the sound of this. So basically a hole saw but for metal instead of wood, and then you get different sizes instead of just one.
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mate it’s just one for a monobloc tap.
Yip IllYes will be listed as bi metal go Bosch or starrett
Get two not just one incase you hit a hard spot
have you ever used a step drill , this type of thing. No idea if it’l just meltYes will be listed as bi metal go Bosch or starrett
Get two not just one incase you hit a hard spot
Cheers I’ll look into this and report back to yoi guys as I’m off to attempt it this morningNot bad for £12 if you have a RS nearby, the right sized hole saw (if you dont have one) will cost near enough the same.
RS PRO Tungsten Carbide Tipped 32mm Core Drill Bit | RS
uk.rs-online.com
So the outcome from the job was as follows. I used a step titanium drill bit 32mm as its widest. I started it off with a normal 8mm drill bit and then used the step drill. I also bought some WD 40 cutting oil. I was using my 18v Makita combi drill. I put it onto drill mode and the gear down to 1. The bar top was about 4mm thick. I went about it slowly taking mini breaks as my drill was getting very hot. The whole thing took about 30 minutes and was actually quite easy and the step drill bit really made quite an easy job. It would catch here and there but generally fine. In the end I needed to make it slightly wider (maybe 35mm in total) and I just used the same step bit to grind it out in a circle around the edge. In in all I would highly recommend this way of going about this sort of job. Thanks to anyone for the advice it was very useful!!I need to drill out a 32mm hole in a stainless steel bar (4 - 6mm) What is the best type drill bit for a normal combi 18v drill.
HandbagsGood job and thanks for the honest review but I just don't agree it's a suitable method to recommend for that material with that sort of thickness.
Sure it may do for a one time job especially if you already had some of the equipment BUT you took your time, used lubricant and pushed your equipment to the absolute limits. If you had more than one to do I think you'd struggle, with a step drill you obviously have to keep drilling consecutive holes to reach the diameter you want putting your drill under tremendous stress. Stainless steel is a pig for blunting tools that's why a carbide tipped tool would always be a superior choice in this situation. I spent a few of my early years as a machinist, hate stainless and once the bit coating is cooked or worn forget about it, well done again for getting it done but it's not one I'd recommend.
As you can see from the original question. It was one hole I needed. Do you know what patronising means??Good job and thanks for the honest review but I just don't agree it's a suitable method to recommend for that material with that sort of thickness.
Sure it may do for a one time job especially if you already had some of the equipment BUT you took your time, used lubricant and pushed your equipment to the absolute limits. If you had more than one to do I think you'd struggle, with a step drill you obviously have to keep drilling consecutive holes to reach the diameter you want putting your drill under tremendous stress. Stainless steel is a pig for blunting tools that's why a carbide tipped tool would always be a superior choice in this situation. I spent a few of my early years as a machinist, hate stainless and once the bit coating is cooked or worn forget about it, well done again for getting it done but it's not one I'd recommend.
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