Stupid Human Trick, Big Chuck small drill

[Ghrey]

This evening I had some small holes to drill in a part for a PJ. Problem was my drill press has a large chuck, and the drill is .042" in diameter. The chuck fully closed does not even come close to gripping a drill that small. I also own a pin vice...


See attached....

Drill grip...

mime-attachment11.jpeg (9.39 KiB) Viewed 5430 times

Yes it worked, a little eccentric but I got the holes done. (!)

[Chadly33]

Ha!   Necessity is the mother of all invention!

[Mark]

I have a dremel with several collet sizes and something like one of these things that holds the dremel like a drill press. I have found it is very easy to break the tiny/fragile drill bits if you aren't careful. And if drilling at high rpms, having eye protection is less frightening. ha
http://www.toolspotting.net/images/drem ... tation.jpg
http://www.wassco.com/prodimagefolders/ ... -60120.jpg

[Ghrey]

Yah I have one of those things, but it is rather primitive compared to the old Drill press.

For one thing the RPM issue you brought up. My Dremel has one speed GO!!! about 18k rpm a bit fast to say the least. ( it is an old, and early model, gets HOT too )

The Big Drill Press is set at about 150rpm. or less... But due to belts and pulleys many other speeds are available,

Using the pin vice ( sans but cap ) allowed me to let the drill slip rather than break, and this old beast has excellent sensitivity, so no issues with over driving the drill accidentally.

The part was a 1" pipe coupling, O.D. machined set to about 45deg so that the holes were angled, there was a small groove pre machined to catch the drill and act as a gas channel.

And last and not least My vice does not even come close to fitting on the little Dremel press. It is to large by far.

Cheers.

[Mark]

I will say one of the hardest things in making something is figuring out how to hold the part. I have chucked up on a tiny drill bit too using my large drill press just because of the ability to use a clamp on the table to hold the part. It's funny/disconcerting to tighten the chuck key and have a bit just slip out because it is too small to be held. I think one time I just wrapped some tape around the bit for a quick fix, nothing of precision. Tape will also slip if you try to bore too fast which can be tricky when you are trying to be gentle using a big lever to press the tiny fragile bit into the work.
Here's my drill press, it's nothing special but having a T-slotted table is a big help at times.
http://www.grizzly.com/products/G7948/images/0