Simple Jigs and Techniques #12: Locating Critical Insert Nuts

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Blog entry by shipwright posted 09-08-2015 01:08 AM 1926 reads 2 times favorited 17 comments Add to Favorites Watch
« Part 11: Modular Veneer Press Build Part 12 of Simple Jigs and Techniques series Part 13: Making Fine Dust for Marquetry Mastic »

This is pretty simple but I hadn’t thought of it before. Maybe someone else can use this little tip. When I was making the adjustable jaws for my school chevys, I needed to locate some insert nuts really accurately so the jaws wouldn’t bind. The slot in the jaw is 1/4” but the hole for the insert nut needs to be 3/8”.

I’m sure there are lots of good ways to do this but here’s what I did. It was really easy and absolutely accurate.

First I marked with a brad point 1/4” bit.

Then I drilled the hole with a 3/8” Forstner bit. The brad hole was a perfect locator.

The fit is perfect and everything slides smoothly.

This is so simple that I almost didn’t post it but then the series is called ”Simple Jigs and Techniques” and besides I had not thought of it before. ......... maybe you didn’t either… :-)

Thanks for looking in.


-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees.

17 comments so far

View SPalm's profile


5317 posts in 3850 days

#1 posted 09-08-2015 01:14 AM

Nice one.
The center point in the forstner bit here is the key. And that that bit will not ‘walk’ around. Neat.


-- -- I'm no rocket surgeon

View Handtooler's profile


1544 posts in 2100 days

#2 posted 09-08-2015 01:19 AM

Maybe easy, but so very useful! Thanks for rethinking and posting this’en. I’ll find use for it very soon/

-- Russell Pitner Hixson, TN 37343

View Jim Jakosh's profile

Jim Jakosh

20314 posts in 3074 days

#3 posted 09-08-2015 01:39 AM

Neat idea Paul. That puts the center spot on where you need it.

When I want to transfer a hole exactly to right location ( in metal or wood) like for a pattern of flat head screws. I drill through both pieces with the tap drill first, then I open up the top holes with a clearance drill and do the countersinking. Makes for a perfect location of the pattern. It takes a little longer but I have leaned through time that is pretty foolproof where spotting with a punch center can wander a bit in the grain of wood when you go to drill it.

Cheers, Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

View Joe Lyddon's profile

Joe Lyddon

10054 posts in 4021 days

#4 posted 09-08-2015 02:11 AM

COOL tip…

Thank you!

-- Have Fun! Joe Lyddon - Alta Loma, CA USA - Home: ... My Small Gallery:"

View Woodbridge's profile


3538 posts in 2386 days

#5 posted 09-08-2015 02:13 AM

great idea Paul. A set of transfer punches also comes in handy for this type of task.

-- Peter, Woodbridge, Ontario

View DocSavage45's profile


8520 posts in 2811 days

#6 posted 09-08-2015 03:02 AM


Hope you got spme water time!

-- Cau Haus Designs, Thomas J. Tieffenbacher

View Sodabowski's profile


2373 posts in 2801 days

#7 posted 09-08-2015 07:30 AM

Bullseye, buddy.

-- Thomas - Pondering the inclusion of woodworking into physics and chemistry classes...

View Mark Wilson's profile

Mark Wilson

2112 posts in 1032 days

#8 posted 09-08-2015 07:56 AM

Center finders for hinges come in lots of sizes. But, for something as big as 1/4”, I think you’re cooking with gas. That means I concur that it’s a swell idea.

-- Mark

View Roger's profile


20923 posts in 2772 days

#9 posted 09-08-2015 11:37 AM

This is a gr8 tip Paul.

-- Roger from KY. Work/Play/Travel Safe. Keep your dust collector fed.

View stefang's profile


15881 posts in 3303 days

#10 posted 09-08-2015 05:52 PM

Always good to have a useful tip like this one floating around in the grey matter. Thanks Paul.

-- Mike, an American living in Norway.

View kiefer's profile


5618 posts in 2635 days

#11 posted 09-08-2015 08:53 PM

Good way to get precise lineup but why not use a 1/4” forstner bit for marking then the tip would be almost identical .


-- Kiefer

View shipwright's profile


7967 posts in 2766 days

#12 posted 09-09-2015 05:16 AM

Good point, because I had picked up the brad point first I guess. :-)

-- Paul M ..............If God wanted us to have fiberglass boats he would have given us fibreglass trees.

View BritBoxmaker's profile


4611 posts in 3005 days

#13 posted 09-13-2015 04:44 PM

Thanks for posting this, Paul.

I’ve had trouble locating my nuts in the past but it shouldn’t be a problem anymore.

-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging.

View Jerry's profile


2613 posts in 1616 days

#14 posted 09-13-2015 05:50 PM

Thanks for posting this, Paul.

I ve had trouble locating my nuts in the past but it shouldn t be a problem anymore.

- BritBoxmaker


Seriously Paul, if you can keep getting comments like this with your posts, I will read all of them ten times. Really great info, thank you!

-- There are good ships and there are wood ships, the ships that sail the sea, but the best ships are friendships and may they always be.

View madts's profile


1855 posts in 2308 days

#15 posted 09-13-2015 05:57 PM

I think British humour at its best.


-- Thor and Odin are still the greatest of Gods.

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