Drills...

tramcar trev

tramcar trev

all manner of mechanical apparatus...
I recently bought these; http://www.ebay.com.au/itm/Good-3pc...pt=AU_DrywallTools&hash=item5d43d2b06a&_uhb=1

Essential for drilling holes in sheet plastic as they don't tear and with a little skill you can actually get a radius to the top edge of the hole...

Also a set of these from .4mm to 3.2mm... an essential collection if you are going to drill holes for the Wussian Wivets....

http://www.ebay.com.au/itm/150-Piec..._Parts_Accessories&hash=item5d4170e0b3&_uhb=1
and exactly how do you twist a .4mm drill without breaking it? With one of these; http://www.ebay.com.au/itm/Hand-Arc...90?pt=AU_HandTools&hash=item5d40dfca62&_uhb=1
 
The price on the step drills is very good. Whenever I drill though plastic, which seems to be often, I get a knot in my stomach, wondering whether or not the drill will catch and split the plastic. I had not thought of using step drills.
 
Even with that doohickey, you may not know your own strength. :laugh::crying:
 
For turning very small twist-drills in plastic, with less risk of breakage, use a pin-chuck, as you are rotating it by hand you don't apply the same loads.
 
I make drills/routers for the plastics industry.. Mainly for window and door construction.. :bigsmile:
 
Phil, are the drills you make any different than drills for metal ? What is the cutting angle of the drill tip ?
 
KeithT said:
So that is what that odd little twisty doofer from my late father's tool kit was for.......I wish I had known years ago :D
Click to expand...
Me too, although it was my grandfathers and as kids we loved playing with the 'helicopter thingy' :admire: There was also a reversible screwdriver that used the same principle that fascinated me.
 
I 'played' with a big Stanley Yankee screwdriver once..
Kept me occupied for ages.. I was not popular when I managed to convert the chuck/bit-holder into a kit of parts!
:@:impatient::wits:
 
Ah, my 131 Yankee. The original cordless drill. Every carpenter, worth the weight, had a Yankee 131 in his toolbox. I think I paid $40.00 for mine back in the seventies. Came with three screwdriver bits. One Phillips and two straight, larger and smaller. Stanley also made smaller versions and one very tiny version with a bulb shaped head that I had in my toolbox. Someone took a liking to it and it was in my toolbox no more. Millers Falls made a version. In order not to infringe on Stanley's patent, the mechanism worked the opposite of Stanley's. If you had to push the little switch forward on the Yankee, then Millers Falls was the opposite. The little switch I'm speaking of determined which way the bit turned.

I still have my Stanley Yankee along with the Millers Falls version. Every once in awhile, I would pull the Yankee out, on the job when some young apprentice asked for a cordless screwdriver. Incredibly, a few had never seen one.
 
Madman said:
Phil, are the drills you make any different than drills for metal ? What is the cutting angle of the drill tip ?
Click to expand...
Nope, both metal and plastic drills are same apart from the point angle.
The points angle is usually 118-120 degress :D
 
Thanks Phil.
 
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