Horizontal Boring Bit Selection

[gatheringsplinters]

Greetings!

I'm looking at drilling through the center of some 10 sided discs. Each disc will be about a half inch thick and I'll have about eight of them in a line. I plan on sandwiching them together with double-sided tape and building a jig to make sure they stay put during the process.

I'll be using hardwood, mainly oak, walnut, ash and laurel.

What is the best sort of drill bit for this operation. I want to have the hole be smooth and limit tear out as much as possible.

Thanks

[ERLover]

What diameter? I like a Brad Point but that will depend on diam.

[gatheringsplinters]

Oops that would have been good to include. 1/2" diameter hole

[ERLover]

A Fostner bit would be nice IF the shaft is long enough and on your last piece you put a backing piece on it for tear out prevention. Also a doweling bit.
http://www.amazon.com/Vermont-American- ... +dowel+bit

[reible]

I'm curious as to why horizontal?

You are also getting close to the full quill length of a shopsmith so besides bit length and other issues like getting all the chips out without a lot of pulling out, any reason that you couldn't go for half a stack at a time? Or even just two at a time and have a jig to insure the holes are all at the same location?

Sometime you have to drill something that deep but clearing chips will be an issue that could be avoided I would think in your case but only you know the details.

Ed

[JPG]

I would likely make a jig and drill them one at a time 'vertically'.

[jsburger]

I really do not understand why you want to drill horizontally. Please explain.

You have not said how big the disks are so that could be a problem drilling vertically or horizontally for that matter. I would drill vertically and use the rip fence and the miter gauge locked in the slot to center the disk on the table. It should not require a special jig. Use a backup board under the disk to prevent tear out and protect the table. A brad point or Forstner bit will work fine.

[JPG]

I really do not understand why you want to drill horizontally. Please explain.

You have not said how big the disks are so that could be a problem drilling vertically or horizontally for that matter. I would drill vertically and use the rip fence and the miter gauge locked in the slot to center the disk on the table. It should not require a special jig. Use a backup board under the disk to prevent tear out and protect the table. A brad point or Forstner bit will work fine.

A 10 sided 'disc' may not register to both the rip fence and miter gauge depending upon the angles..

[ERLover]

Well good morning JPG
You are right, a 10 side disc does not have 2 flat 90* side. But as John said with the miter gauge adjusted to the propper angle that can brace the angled side, the fence the other.
https://images.search.yahoo.com/yhs/sea ... top&norw=1
I would still do it vertically but not seeing a pic of the project, it is hard to see all, no pun there.

[JPG]

Well good morning JPG
You are right, a 10 side disc does not have a flat 90* side. But as John said with the miter gauge adjusted to the propper angle that can brace the angled side, the fence the other.
https://images.search.yahoo.com/yhs/sea ... top&norw=1
I would still do it vertically but not seeing a pic of the project, it is hard to see all, no pun there.

Where did 'John' say that?

It ain't morning here! Went to 'horseshoe' and took some of their money today(a 90 minute bus ride).