Layout Tool for Round Stock

  • Advertise with us
Project by Jim Jakosh posted 11-28-2013 01:31 AM 6768 views 18 times favorited 35 comments Add to Favorites Watch

When I want to find the center of a round piece, I can scribe a couple lines with that little yellow tool in the second photo and I have the center quickly. But I often want to lay out a pattern of holes on that round piece and need them equally spaced. For that , I always had to get out my little steel angles and hold them to the plastic tool and try to scribe a decent line for multiple locations. I just got tired of that and have been working on this little tool for a long time now and just completed it today.

This centering tool with the sliding attachment at at 90, 30 and 45 degrees makes it so simple and I don’t need 3 hands. I have looked for one of these in tool catalogs and cannot find another like it.

The V- is maple plywood and the centering arm is 3/16×1/2” 01 ground tool steel .
The aluminum attachments each have an 8-32 Vlier spring plunger in them to hold the gauge surface against the centering arm and they slide freely along it.

To use it, you draw a center line with the center arm. Then I put on the 90 degree angle attachment and draw a perpendicular line. Then you use the 30 or 45 degree attachment to line up with the line you just drew and scribe a new line on the centering arm.

Using this tool you can lay out 2,3,4,6,8 or 12 equally space segments. I find it is best to use a scriber rather than a a pencil because the lead wears and the line gets too thick and is off center then.
It is nice when you have a piece with a hole in the center too because all you need is a line to work to, not really a center point.

Now I can’t wait for the next round job that needs to be laid out to use this tool!!

Cheers, Jim

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

35 comments so far

View tyvekboy's profile


1730 posts in 2942 days

#1 posted 11-28-2013 01:44 AM

Very handy. Great tool design.

Wish I had the metal working tools you have.

-- Tyvekboy -- Marietta, GA ………….. one can never be too organized

View Strombergm's profile


10 posts in 1572 days

#2 posted 11-28-2013 01:51 AM

Jim- you send you projects are great! Theasternratorium two that you have posted have addressed two major problems that I routinely encounter….. Are you some sort of engineer?


-- Mike

View luv2learn's profile


2737 posts in 2232 days

#3 posted 11-28-2013 02:39 AM

That will be one of your most used jigs in the shop. Thanks for sharing it with us Jim.

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

View BusterB's profile


1961 posts in 1937 days

#4 posted 11-28-2013 02:59 AM

Whew Jim, finally you posted a jig I dont see having an immediate need for….thank goodness!!! lol My “gotta make one of those” list is getting pretty full….lol Seriously cool jig buddy. I can see that being very handy around the shop.

-- Buster, Ocoee TN (Critics are men who watch a battle from a high place then come down and shoot the survivors - Hemingway)

View TopamaxSurvivor's profile


18224 posts in 3605 days

#5 posted 11-28-2013 03:04 AM

Looks handy.

-- Bob in WW ~ "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View HillbillyShooter's profile


5811 posts in 2221 days

#6 posted 11-28-2013 03:07 AM

That is one cool tool—looks to me like Starrett may be in trouble. Really great job on this one!

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

View Rick's profile


9180 posts in 2962 days

#7 posted 11-28-2013 03:18 AM

Very Nice Work Indeed! Thanks For Sharing!


-- Why Is There So Much Month Left At The End O f The Money? (Rick, Ontario, Canada)

View Cedar Furniture Lodge 's profile

Cedar Furniture Lodge

815 posts in 2201 days

#8 posted 11-28-2013 03:54 AM

Neat Idea, I wish I had the nack to build stuff like that.

-- "The Cedar King"

View CFrye's profile


10066 posts in 1769 days

#9 posted 11-28-2013 03:58 AM

Great stuff here Jim. I recently watched a video, somewhere, about marking a circle into sections like this using a compass. It was easy. So easy I forgot how to do it or where I found it. With this I could just walk over to the Wall O’Jigs and do it! (I think) Thanks for sharing.

-- God bless, Candy

View doubleDD's profile


7211 posts in 1972 days

#10 posted 11-28-2013 04:35 AM

This is a real good one. It will be extremely handy for some up coming projects. I will have to copy it one way or another. Thanks Jim.

Don’t loose this one.

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

View harry1's profile


523 posts in 2214 days

#11 posted 11-28-2013 06:18 AM

That’s one ingenious, useful and precision jig Jim, I’m envious of your talents.

-- Harry, Western Australia

View Dutchy's profile


2785 posts in 2097 days

#12 posted 11-28-2013 07:18 AM

How smart. Thank you for the idea.


View Doe's profile


1402 posts in 2759 days

#13 posted 11-28-2013 10:06 AM


-- Mother Nature talks, I try to listen

View aussiedave's profile


3114 posts in 1753 days

#14 posted 11-28-2013 11:34 AM

What a great tool for finding centre Jim…thank you very much for sharing this one….going to have to make one myself…

-- Dave.......If at first you don’t succeed redefine success....

View hunter71's profile


3126 posts in 3115 days

#15 posted 11-28-2013 11:53 AM

Well thought out build, thanks for sharing it.

-- A childs smile is payment enough.

showing 1 through 15 of 35 comments

Have your say...

You must be signed in to post the comments.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics