CNC Drilling

[Powder keg]

I had a good day today! One of the parts I build is a chain case that uses High Velocity chain. This one runs 6" wide chain. On our old manual mill this box took me around 20 hours. I made one today in 6.5 hours and all the holes were drilled. Before another guy drilled and tapped them. Here is a shaky video of me drilling 12, 5/16" X 5/8" deep holes with a HSS bit. It took only 2 min. 45 sec. I have a couple more pictures if interested? The hoe is 13" in dia. and the spot face is 16".

[ame]http://www.youtube.com/watch?v=CnCV5m6ec3M[/ame]

Later, Wes

 

[AllThumbs]

Did you have it spot drilled first? Also must be an older cnc, since its wide open. Pretty cool.

E

 

[Powder keg]

Yes, I spot drilled all the holes first. And yes, it's pretty old. 1990. There isn't much of a chip guard on it. Sometimes you about need a rain coat to be near it)

Wes

 

[rake60]

Great video Wes!

One of the jobs that we get on a regular basis is a roller for a major heavy
equipment manufacturer. The orders are usually in multiples of 12.
They are made from 4340 alloy steel so drilling is a little tough.
They call for a 7/16" grease hole drilled 13-5/8" deep from one end.
It can be a little nerve-racking on a CNC. Theoretically watching the load
meter on the screen you should see when the bit is getting dull.
On the other hand, if someones stomach growls in another building
your jumping toward the controls! :big:

Makes me apprecite the feel on the handle of a manual machine.

Rick