Thanks GRS Graver Mach. nikkon scope,and whats called a 'Nail Drill'.A handpiece that has a 35000 rpm max. The main thing is the scope. I make my own cutting bits,from old burs,drill bits,and piano wire(which is tool steel). You can buy anything that small,and resharpening often i essential. Shaun www.youtube.com/user/express37…
Thats AMAZING! Very cool indeed... Was looking at the difference between the Nail Drill and a Foredom tool, but I think I'm leaning towards the Foredom. I can see how the Nail Drill 'definitely' is popular due to it's price! I wonder if they last very long under heavy use however... Thanks again for the link!
I'd recommend the nail drill for what I'm doing. The foredom has torque,but the nail drill has speed,which gets rid of the wobble. My drill was over £100 new,but i got it used for £45.I'm amazed its still working so well.I probably have it running for 6 hours + several time a week,for the last 6 months.
Actually that sounds like a Hell of a Deal! I was actually looking at picking up the 'Power Carver' (400,000 rpm, air driven) hand piece (only $250.00), but considering that the Nail Drill has very little wobble and runs well (even used), I think that will suit my initial needs quite perfectly!
BTW, what 'bits' do you prefer to use with your Nail drill??
Id like to try one of those air drills. I think the speed they get to removes even more of the wobble,and they are described,that because it goes so fast there is no chance of it running away with itself. You need a decent compressor I heard,as they use a lot of air. I was looking at dentist hand piece from china,but could find a cheap straight one.
If you want to go really small,then its necessary to make your own burrs. I use old carbide bits.but any tool steel will work if you are just doing coins,and it's an easy job to sharpen them. Some cheap diamond stones. Grind them to the size you want.This also corrects the wobble,and the make 2-4 flats at the end.Like the end of a nail. I do this all under the scope so i can see what I'm doing.You need to experiment,sometimes you might want a really sharp one,and sometimes not. There is a slight technique you need to learn also. The nail drill I have,can go clockwise or anticlockwise.If you are right handed,then keep it clockwise,and mostly cut with the left side of the tool,or the tip pulling towards you. I do break this rule quite a lot though?
Slight downside with the nail drill is it only takes 2.3mm burrs,and I haven't been able to change the chuck.Most of the cheap diamond burrs you can get are 3mm.Even the ones I ordered that said they were 2.3mm were 3mm!.