Ton-up
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- Thread starter mitchel.
- Start date
Tigman
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https://www.orbitalfasteners.co.uk/en/categories/rotabroach-mag-drill.-cutters-machines
go here and at the bottom of page
go here and at the bottom of page
Bill Edwards
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If buying a mag drill, get a Rotabroach panther - see the recent thread http://www.mig-welding.co.uk/forum/threads/looking-for-a-mag-drill.59924/
I bought one myself and it is fantastic, how did I ever manage without...
I bought one myself and it is fantastic, how did I ever manage without...
Ton-up
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wyn
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Kent
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Drill them before you weld that side in usually. Irwin type single pitch hole saw will do one skin at a time only ( it won't go throughbothsides of box simultaneously)
Blacksmith drill if you must drill for eyebolts on site on a made up gate - but why? And you will leave a rusting spot especially bad on box. It's just a tatty unprofessional way of doing stuff and will lead to customer complaints in future years as the hole through the box corrodes, paint damaged and the gate eventually drops
tinman123
Putting the Extra into ordinary.
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umm, i know them too, they are TCT cutters, indeed i have one here.
i have a 80mm one for the mag drill, all be it not for a hand drill but they are the same family.
my genuine opinion on it would be " Never again".
its basically a pipe with tips welded on it, which unless your in ideal conditions one wrong sniff and she will destroy herself.
or at least that's what happened to mine, she decided to hold on to the work piece and in a split second it managed to nip off about the half of the teeth on it, glass wouldn't of shattered as quick hi.
i was drilling a 80mm hole in 13mm hardox plate at the time but i wasn't rushing it, 80mm is a good size in a magnetic drill so its not something you would lean heavy on but once was enough for me im afraid.
my personal opinion is they are a cheap way out of a rotabroach cutter but a dear way in the long run.
now one could say yeah, sure that's the operators problem but ive had a mg drill now for 12 odd years and as many holes as id drill ive only ever broke or damaged about 3 cutters in my life, one of those times was when the sparkie decided to kill the power to the site i was on once, while i was drilling a hole in a stanchion.
maybe he thought my drill was solar powered.
anyways, id take a hole saw over a tct cutter all day long, it wont be as quick as the tct but it ill last the damn race.
after that if i was looking to go up to a 20-15mm hole id just use a step drill.
WALM
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Hi all, looking for a solution for counter sinking with 0 angle. I basically have some 20x150mm flat bars that are being used as wear plates, I want to drill a 30mm hole 10mm deep (or however deep to keep the bolt head flush) to sink an m14/16 bolt head into and still be able to get a socket in. Blacksmiths bits could work but I don't really want the angle they have as I would like to tighten the bolt onto a flat surface if you see what I mean.
it's doable but it invlves a bit of makeing.
had to do exactly the same thing more or less. my solution was broach an 18mm hole as normal for the m16, then turn a piece of bright bar, down to 3/4 at one end to put two flats on to fit into the mag drill, turn the other end down to sothing just under 18mm, leaving a collar between the two ends in that i cut two notches and mounted carbides for lathe tools in.
had to do exactly the same thing more or less. my solution was broach an 18mm hole as normal for the m16, then turn a piece of bright bar, down to 3/4 at one end to put two flats on to fit into the mag drill, turn the other end down to sothing just under 18mm, leaving a collar between the two ends in that i cut two notches and mounted carbides for lathe tools in.
daleyd
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You need a counterbore, but I'm not sure if you would get a 30mm one. (I'm sure you must be able to but not sure where or what they would cost?)
Could you use cap head screws instead so you could get away with a smaller counterbore?
Wendelspanswick
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Easiest way is to get a 30mm drill ground to a counterbore, the minor diameter (16mm) would be ground as a standard drill point and the major diameter ground as a counterbore.
Most tool sharpening places could do this for you.
Most tool sharpening places could do this for you.
tinman123
Putting the Extra into ordinary.
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unless you have a litany of them in it youd want something stronger than a 8.8 bolt in it anyways.
a 10.9 or 12.9 socket head cap screw would be the best plan imo and if the wear plate is only 20mm thick then id say youd be wanting this type.
