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Ball Drilling Jig

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Project by johnhutchinson posted 241 days ago 1982 views 19 times favorited 33 comments Add to Favorites Watch

When I was making my radial wave lamp, I needed to come up with a way to drill accurate holes through wooden balls. So I came up with this “clothespin” solution. I mounted a short board with a slot to a longer board and then drilled a hole with my variable-diameter hole saw. The hole saw’s 3/16” pilot bit gave me the center point in the base board. I then used a regular 3/16” twist bit to position the jig on my drill press table. After clamping the jig to the table, and then pinching the ball in the clothespin, I can use any size bit for a perfectly centered hole.

PS—The table on my little 10” drill press may look a little unusual. It’s an oval Corian sink cutout that I mounted to the steel table with double-face foam tape.

-- John - Central Ohio - "too much is never enough"





33 comments so far

View Vince's profile

Vince

948 posts in 2061 days


#1 posted 241 days ago

Nice jig, I’ll have to make one of those. Thanks for sharing that.

-- Vince

View SPalm's profile

SPalm

4788 posts in 2514 days


#2 posted 241 days ago

Clever one John.

I have used Corian cutouts too for various things. They make a nice stable flat surface. Glue does not stick to it either.

Good idea, thanks,
Steve

-- -- I'm no rocket surgeon

View stefang's profile

stefang

12935 posts in 1966 days


#3 posted 241 days ago

Good jig John.

-- Mike, an American living in Norway.

View Monte Pittman's profile

Monte Pittman

13783 posts in 970 days


#4 posted 241 days ago

Great idea.

-- Mother Nature created it, I just assemble it. - It's not ability that we often lack, but the patience to use our ability

View johnhutchinson's profile

johnhutchinson

611 posts in 261 days


#5 posted 241 days ago

I used a variable-diameter hole saw for the hole in the “clothespin” so I could slightly upsize it from the advertised diameter of the balls. The true sizes are all over the place, and a lot of them are egg-shaped rather than true spheres.

-- John - Central Ohio - "too much is never enough"

View doubleDD's profile

doubleDD

2397 posts in 675 days


#6 posted 241 days ago

A well thought out simple jig. Should be handy for many projects. Good idea.

-- --Dave, Downers Grove, Il. When you run out of ideas, start building your dreams

View HillbillyShooter's profile

HillbillyShooter

4508 posts in 924 days


#7 posted 241 days ago

Very nice solution and jig—thanks for sharing another keeper.

-- John C. -- "Firearms are second only to the Constitution in importance; they are the peoples' liberty's teeth." George Washington

View JoeinGa's profile

JoeinGa

3169 posts in 639 days


#8 posted 241 days ago

How do you like that adjustable hole bit? What brand is it?

Nice jig by the way.

-- Perform A Random Act Of Kindness Today ... Pay It Forward

View johnhutchinson's profile

johnhutchinson

611 posts in 261 days


#9 posted 241 days ago

The Vermont American adjustable hole saw is probably the safest of its kind out there. I’ve been using mine for a dozen years and it’s easy to sharpen. Here’s a link and a picture.

http://madools.com/show_Product.asp?ID=849045325184011

-- John - Central Ohio - "too much is never enough"

View luv2learn's profile

luv2learn

1679 posts in 934 days


#10 posted 241 days ago

Very clever idea John, its in my favorites.

-- Lee - Northern idaho~"If the women don't find you handsome, at least they ought to find you handy"~ Red Green

View Roman Hrytsak's profile

Roman Hrytsak

469 posts in 1318 days


#11 posted 241 days ago

I like the jig. I see safety and precision! Keep your posts coming. RH

-- Roman:... there are no mistakes, just opportunities for a design change!

View johnhutchinson's profile

johnhutchinson

611 posts in 261 days


#12 posted 241 days ago

I just looked at your wooden shoes, Roman. They’re amazing! I like the idea of taking one thing and doing it over and over until you’ve become the master.

-- John - Central Ohio - "too much is never enough"

View Diggerjacks's profile

Diggerjacks

1743 posts in 1770 days


#13 posted 241 days ago

Hello John

An indispensable jig for who want to drill a ball

I will make one like this in the next days

Thanks for sharing

-- Diggerjack-France ---The only limit is the limit of the mind and the mind has no limit

View Maveric777's profile

Maveric777

2690 posts in 1708 days


#14 posted 241 days ago

Very Cool!

-- Dan ~ Texarkana, Tx.

View hoss12992's profile

hoss12992

2584 posts in 525 days


#15 posted 241 days ago

Great job, I can def use one of these

-- The Old Rednek Workshop https://www.facebook.com/theoldrednekworkshoptn

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