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Thread: Punch 12mm hole in 8-10mm steel
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2nd Jan 2020, 12:30 AM #136Most Valued Member
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A bit of a short clip of progress using those two second hand drill bits from ebay, still cannot find my allen keys
https://youtu.be/eURRa8m7otU
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2nd Jan 2020, 08:08 PM #137Most Valued Member
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Gazza, tighten that goddam table tilt before you do yourself an injury. Also, when you clamp something like you did in the video clip, place a packer under the clamp and the table so that the clamp is vertical and has an even force on it, NOT just the outer end of the clamp.
To be honest you are a disaster waiting to happen with stuff like that.
Kryn
P.S.
My sincere appologies for being abrupt with your video clip. It's just that I saw someone doing similar recently, whereby they had inflicted a very nasty injury on themselves, and I'd hate to see something like that happen to you.
Again my most sincere appologies.
KrynTo grow old is mandatory, growing up is optional.
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2nd Jan 2020, 08:12 PM #138Gear expert in training
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Some people just have to touch fire to figure out that it's hot
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3rd Jan 2020, 02:07 AM #139Senior Member
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3rd Jan 2020, 03:49 AM #140
Gazza, Quit whilst you are ahead ! Your video should be listed as how not to...
Best Regards:
Baron J.
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4th Jan 2020, 03:37 AM #141Most Valued Member
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Pretty sure someone has flogged my allen key set, i previously mentioned i needed the allen key to tighten the dp bed i dont have anyway of getting a new set of AK's
Yes it was reckless i was drilling in the center of the bed each hole but still not text book drilling
I am a risk taker in general with tools im just uneducated guys, you were all taught by the book so that is all u know, for me its a wing it deal i do hurt my self but no major injuries so far touch wood
That bed was not as lose as it looked in the video 1/8th a turn of the bolt and she will be tight but no excuses
I done the wrong thing and i'll probably do more wrong things in the future but your advice is heard i did put a clamp on there
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4th Jan 2020, 05:52 AM #142Senior Member
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4th Jan 2020, 06:55 AM #143
Hi Gazza,
No one on these forums wants to see you or anybody else hurt themselves because of poor practice !
Take it from me, I've seen some terrible injuries in my time, including one or two to myself. I've seen drills simply shatter into bits causing eye injury. I myself got a broken arm from a length of flailing bar extending too far out of the rear of a lathe mandrel, because someone didn't use a tail tube. I was only walking by at that time.
Things go wrong far far faster than you can think.
We can all offer advice but its up to you to think about what you are about to do !Best Regards:
Baron J.
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4th Jan 2020, 01:40 PM #144Most Valued Member
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Gazz, some of us haven't been "taught by the book" as you put it. We've learnt by the school of hard knocks, and don't like to see others learn by the same education system.
You've ALL day to drill a few holes, just think about what might happen. Because we become complacent using our tools, when we get a new, better tool, it can come back and bite us really hard. I did it this way on the old machine, why did it go wrong this time, type of thing.
An ounce of prevention is better than a pound of cure, I think is how it goes.
WE"RE not picking on you by any means, just trying to help a newcomer to this great hobby, stay safe.To grow old is mandatory, growing up is optional.
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4th Jan 2020, 08:09 PM #145Most Valued Member
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As my employer is discovering, it’s how you deliver your message on safety that dictates how well the uptake will follow...
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7th Jan 2020, 03:23 AM #146Most Valued Member
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Need some more help guys if anyone is willing to help with my unsafe practices
Im working on my 6 meter aluminium trailer i need to drill 2 vertical holes thru the Y section it consist of multiple layers of steel plates and shs steel tubing, i need to find a 6mm and a larger drill bit either 12mm or larger but the bits need to be 200mm long
I cant afford to buy these from bunnings (sutton tools) cost is about $65-$70 and i may only use these for the one job
Has anyone came across these size drill bits online preferably cheaper than bunnings? I can really only afford about $30-$35
Cheers
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7th Jan 2020, 06:12 AM #147Most Valued Member
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Assuming I’m getting what you’re doing correctly, mark it up on both sides and drill each side
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7th Jan 2020, 11:27 PM #148Most Valued Member
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Its a bit more difficult than that this is the sandwich
Top: 6mm plate
Space: x size
Top of drawbar shs 100x100mm: 3mm
Bottom of drawbar shs 100x100mm: 3mm
Space: x size
Bottom plate: 6mm
The difference between the top plate and bottom plate is 130mm the 100mm drawbar sits inside this space so to drill all seperate pieces they may not align unless im absolutely 100% perfect with drilling
If i get the 180mm drill bits i can just clamp the drawbar in position and drill thru the lot in one go top to bottom and run a couple bolts thru it
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8th Jan 2020, 12:16 AM #149Most Valued Member
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Gazza, will the drawbar be floating in the space between the upper and lower plates???
I'd make up some plates to fill the gap between the upper and lower plates, if it is.
Otherwise, you're going to have BIG problems.
Something that I've done when in your situation where I can't drill from both sides, is to extend the drill bit.
Get hold of a 1/2" drill bit with a 3/8" shank, get a piece of 3/8" BRIGHT bar (it's more round than black bar) and weld the 2 together. Make sure it's straight, otherwise you're going to have BIG problems.
Clamp the smaller end of the drill bit in the bottom of a piece of angle, and then lay and clamp the bright bar extender in.
Don't use a straight shanked drill bit and extend it, because when you go to grind it back so it'll fit in the hole, it will break.
Leave a bit of a gap about 3mm max for decent penetration. Just to reiterate, make sure it's straight!!!!
By the way, I WON'T be held responsible if you're injured.
HTH
KrynTo grow old is mandatory, growing up is optional.
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8th Jan 2020, 12:24 AM #150Most Valued Member
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Probably a good idea to post a photo of the set up. I'm pretty sure I know what you've got, but a photo would be good to be sure plus I suspect you may have another issue looming if things are as I suspect.
Anyway, if a tradesmen were doing the job, they would mark it and drill from both sides. Accuracy at every step is paramount.
I understand that you lack confidence in your abilities, so another option is to mark it out and then pilot drill from both sides (6mm is too big a pilot for a 12mm hole by the way), then using a long 12mm drill bit you can drill all the way through from one side. This way you only need one long drill bit.
I really would like to see a photo of drawing of your drawbar arrangement as I suspect you could be heading the wrong way on this one.
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