Thread: How to Make a Clean Hole with 1 1/8" Dill Bit?
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Unread 08-03-2014, 22:27
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Re: How to Make a Clean Hole with 1 1/8" Dill Bit?
Quote:
Originally Posted by cgmv123 View Post
Start by using a center punch to accurately place the center of the hole. Then drill through with a bit like 1/8". Then use the 1 1/8" bit. Remember to properly align the workpiece under the drill press each time. Cutting oil will help too.
Oh thanks. I'm actually not sure if we'll be able to center punch the piece though since the area we're drilling already has a bunch of holes around it (I know, its a bad idea) but we'll give it a go.

Quote:
Originally Posted by mrnoble View Post
We have used step drills, such as the Irwin Unibit. Grainger has an assortment of them, with some going up to 1-1/8" and larger. Harbor Freight has a set for cheap, but they don't last and are a bit dull.


http://www.irwin.com/tools/browse/dr...it-step-drills


http://m.harborfreight.com/catalogse...obile_redirect
Also, thanks! We'll definitely look into these.