Drilling a square hole on a drill press!

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Forum topic by Dick, & Barb Cain posted 11-25-2011 05:12 AM 10835 views 0 times favorited 9 replies Add to Favorites Watch
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Dick, & Barb Cain

8693 posts in 4567 days

11-25-2011 05:12 AM

Topic tags/keywords: resource

This is interesting, this done in steel, but why not wood?

Drill a square hole.

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN.

9 replies so far

View Jim Bertelson's profile

Jim Bertelson

4261 posts in 3432 days

#1 posted 11-25-2011 08:13 AM

Pretty interesting, Dick. The chuck must be offset on a separately rotating sleeve….......or some such…......

Happy Thanksgiving….........hope you and yours are doing well…............

-- Jim, Anchorage Alaska

View able339's profile


47 posts in 2642 days

#2 posted 11-25-2011 08:31 AM

It’s called a mortise.

-- TNJames

View doyoulikegumwood's profile


384 posts in 4260 days

#3 posted 11-25-2011 08:36 AM

the bit is whats called a Corner Radius End Mill and it is mounted in corner radius chuck, which is then mounted to a ether a CNC or a mill if you look closely the chuck is making 50 or so micro movements every rev and turns out to be a very expensive way to make square hole in wood.

-- I buy tools so i can make more money,so ican buy more tools so I can work more, to make more money, so I can buy more tool, so I can work more

View Richard's profile (online now)


11070 posts in 3300 days

#4 posted 11-25-2011 09:05 AM

Oh Boy! If I get one of those, then I have to get rid of these and they cost me $155.00!!

-- Richard (Aurora, Ontario, CANADA)

View Pete's profile


18 posts in 2644 days

#5 posted 11-25-2011 02:03 PM has a clearer view of whats going on here, and maybe a way to have it on a portable drill? :D

View Grumpy's profile


24936 posts in 4118 days

#6 posted 11-27-2011 08:51 AM

I wish I had one of those Dick.

-- Grumpy - "Always look on the bright side of life"- Monty Python

View fussy's profile


980 posts in 3318 days

#7 posted 11-27-2011 11:37 AM

Dick and Barb,

Go to Roy Underhill’s site and watch him do it with a breast drill, special bit, and a metal plate with a square hole in it. Drills perfectly square holes to match in a flash. Makes a little noise, is fun to watch, and was used over here in at least the 18th century.


-- Steve in KY. 44 years so far with my lovely bride. Think I'll keep her.

View Lee Barker's profile

Lee Barker

2170 posts in 3118 days

#8 posted 11-27-2011 04:19 PM

I recall seeing a piece in Popular Science/Mechanics 4 years ago or so, in the Tools, Wow, Gee Whiz section. It was done in a drill press; I don’t think a portable drill would work.

Low speed, and There You Are. Apparently there was no great need for square holes, because I haven’t seen one since.



-- " his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

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Dick, & Barb Cain

8693 posts in 4567 days

#9 posted 11-27-2011 05:30 PM

I know this system isn’t very practical for woodworking, but it’s fun too see it working.

In ways it operates on the similar principal as the Wankel rotary engine that was popular back in the 60s, except the bit follows a different pattern

-- -** You are never to old to set another goal or to dream a new dream ****************** Dick, & Barb Cain, Hibbing, MN.

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