Project Mulligan

[suicideneil]

Angry Alien- sure, just deposite ~ $1500 in my paypal account

Chris- I was using a centre punch, Im just that crap! Some mistakes were just the drill bit wandering a little despite the punch mark, easily corrected with a tiny bit if filing, but other errors still have me scratching my head. Measured and marked the distance carefully, centre punched, drilled perfectly straight/ right angle to the surface.. yet still off somehow by a good 1-1.5mm ( holes too close together ). Im not gonna let it worry me too much as you cant see any of the mistakes unless you dismantle the truck (ignore the obvious hole in this picture as I recycled a spare bit of angle that had a few holes in it already), but I do look forward to this year as I will treat myself to some new workshop toys now that my little sister and her boyfriend have moved out of the spare room, giving me back my workshop; gonna get a proper work bench, drill press, few new metal working tools ( files and large hacksaw, junior one is no good for trimming up larger pieces of metal ) and a decent vice.

I would dearly love a small hobby shop type lathe and vertical mill, The Candyman bought some a little while back to make his life easier and its awesome some of the stuff he's produced, but I cant really justify spending £300-500 on each of those, then a load more on top for tooling; I'll just send you guys my drawings and lots of cookies

[thzero]

Oh man I hear you... if anyone has advise on this, that'd be great. My measurements always seem to be freaking off.

Originally Posted by suicideneil

but other errors still have me scratching my head. Measured and marked the distance carefully, centre punched, drilled perfectly straight/ right angle to the surface.. yet still off somehow by a good 1-1.5mm ( holes too close together )

But otherwise that looks great!

hi thzeor...the advice is use a bs 1 centre drill to start any small hole drilled....pop the centre drill in the chuck... drop it in a centre punch mark and before you press the trigger make sure drill is 90 degrees to work BOTH ways....bury the centre drill into the work about 6mm until it leaves a hole with a cone around it, this will allow the bigger drill to follow this hole thus improving accuracy...your drill must be sharp to drill metal....drilling alloy needs a bit of lube so wd4o or something like that and the smaller the drill the faster it needs to run....dont push down too hard, the harder you press the more the drill removes with each rev....stop every 4 -5 mm to make sure the drill flutes are not blocked...and in steel slo down the speed and feed a little and keep the drill bit cool and lubed...
happy drilling....

just a foot note..at college to pass my level 2 engineering i had to make several parts by hand on the bench fitting course, these had to be to within +/- .25mm of the drawing and they had 20 year old drill presses for me to use, that soon taught me how to get holes nice .50mm off and its a re-make, back to the start with a raw block of metal.