Sure the centre finder makes you draw off-centre. So just flip it, draw again, and it'll make to extremely close parallel lines. Same for your intersecting lines. And you end up with a tiny parallelogram enclosing the true centre.

After watching all these videos today, I just got a sudden urge to go to the garage and play with circles. 😎 All your videos (not just today's) are high quality content, but today you also passed the quantity test.

Nothing to build or "buy" for the purpose of finding the center of a circle. I just went out to the garage and tried it myself. How Great!

Easy peasy, much better way than other methods, thanks.

Absolutely brilliant. You just saved me a good chunk of change by using tools I already have. Thank you.

Bravo! An ingenious idea, without having to buy or build a tool to find the centre!

I like learning new ways to layout parts. These 3 videos were very informative. For more precise parts I will use layout fluid or a Sharpie and a scribe

Nice trick! I use those Silver Streaks all the time at work to mark defects. Back when I was a welder, an older guy blew my mind when he showed me that the cap came off and had a sharpener inside. Made layout more precise. Most people I show that to- to this day didn’t know about the “hidden” sharpener.

That is a great tip. Thanks for sharing!!

That's a pretty neat trick. Thanks for sharing this

Good method, simple and quite straightforward. You could also use it for a flat plane circle by using the points of a divider placed on the circle and butting the square against the points.

Thank you very much for sharing that was extremely useful

Awesome, so simple.

Fantastic video! Thank you so much for this!

very simple, very helpful

Great and simple idea

Pretty cool. Thanks

Nice !! That's it. Just nice and easy ....

Great video !

You don''t have to be spot-on; you're looking for the centre of a very small error. Great use for a speed square. Wish I'd been shown as an apprentice steel fabricator how damn handy those things are for marking around steel sections.

Great vid! Thanks for showing this. I'm gonna try this method with one slight modification to fix up the true centre issue: I'm going to put a piece of masking tape where the centre approximately is, then with the true centre, I'm going to run a scalpel to ever so slightly score the tape area right up against the true centre. And do that 3 to 4 times to triangulate the exact centre.

Excellent tip!

All you really have to do with the commercial centre finder is repeat it several times and the lines will intersect to create a small 'circle' the centre of which is dead centre. You tip is very relevant though... so long as you actually hold everything exactly the same!

Good idea(s)!

I like that. Thanks

Simple - thanks

Thanks Very good.

Man, I gotta tell ya, when I watched that first video for finding the center I spent the next 15-30 minutes thinking of ways how to pull this off at work (especially when my boss sees it, cause he's mr. Know-it-all). Now with the new video I want to show off even more 😆😆😆

like it...another easy way is set the right angled piece as outside the circle to form two tangents. Then draw two right angle lines from the tangent contact towards the center of the circle. Where they cross is the center..

This is great. I want to point out something you did naturally that worked in your favor. You held the two parts together and didn't reverse or flip them. If you would have clamped them and done that simple rotation around the circumference with the assembly, the square could have been off by a little bit (say 89.5 deg), or the speed square (say 44.7 deg). When you make three or more tick marks in the center, the tiny circle will be exactly the center of a perfect larger circle. Similarly, i guess you could have used the Starrett and had a set of lines forming a tiny circle around the true center, a pencil width away, but the fat line is even fatter here. All bets are off if the outer circle is not circular, but it should still be close to the average center.

THANK YOU

so helpful

Outstanding ! You are a great source of info ! B.T.W. I have a leatherman Sidekick in near Virginal condition , that I will gladly gift to you . I gets little carry time , which is a Sin! Largely due to your input , my main Multitool battery is the Surge + Bit adaptor and Whia bits , for work , and Spirit X with a Leatherman adaptor which fits the Whia bits . Can’t beat the Spirit for elegance and compactness ! Again if you are interested the Sideclip is yours !

Use a scribe, and Starrett is a precision tool, made to layout true circles, rotate the centering head multiple times and get the exact center!

I will stick to the center square. You do not have to hold two different squares in perfect alignment to get your perfect center point and if you are using the silver marker you are not worried about being to accurate. Because it is not far from using those kinder garten colors that are 1/2 inch in diameter for easy handeling by little hands. And sliding the center square around the perimeter and making several marks your perfect center will be the center of the multiple of marks. That will be very close if your circle is uniform. I just never had much luck holding 2 tools uniformaly with one hand.

That angle rule is designed to be used with a scribe, which has a very fine point on it.

Awesome

Thanks.

Now I know why my centers are always slightly off when I use the center finder of a combo square. Thank you. Would I have the same problem if I used a very fine point scratch marker?

Great content Mr TX 👏🏽🇿🇦

This works fine if both your framing square and your speed square are accurate. You can also adjust your normal center finder with tape.

Looked like the edge your pencil was on moved enough right at the very end is what happened. Very slight movement. Thanks for explaining your method.

You could probably just use a regular ruler. Place the 0 on one edge of thd circle and then pivot on the 0 until you find the largest length to the other side. That's your diameter. Rotate the circle and do it again. The intersection is your center.

Do one for bolt hole pattern layout the old school way

It seems everybody has a different method of finding the centre of a circle, the easiest way is to measure across the circle and find the largest measurement, mark both sides and draw a line across, then bisect the line, there is your centrepoint.

Your center finder tool for the combination square is accurate if used with a scribe

The perpendicular bisecters of either a cord or tangent of the circle will intersect at the Center of that circle.

You just need one speed square. Use the longer side of the square as chord. Then it is very easy to make a perpendicular bisector. Do the same thing from another point and two perpendicular bisectors will meet at the centre of the circle.

You can get the leatherman bond off of the rei website

That’s why you use a razzer blade to scribe metal.

Could you make a video of all the gear and clothing you wear to work? Specially for winter months

👌👌👌👌👌

Why would anyone be bothered about the thickness of the pencil nice video

Why didnt I know about this 35 years ago?

You sound remarkably like Dustin Hoffman.

Or, you can simply draw your line with a scribe to achieve a most accurate line closest to the blade of the center finder head, then flip the tool so that the blade is opposite your line, scribe another line, you will notice about 1/16" gap between your two scribe lines. The center of that gap is your true center. :)

yeah I mean this is fine but the deviation in the 30 thou-ish centre finder is absolutely negligible if you cannot guarantee the 'circle' you have is perfectly circular... I've also never known anything to be marked like this for a centre to be critical down to much less than about 0.040 anyway. If you want a centre to be accurate scribing lines just use a scribe... which will press right up against the straight edge of the centre finder giving

Thre is easy way for find center

A touch off = the thickness of the marker 😂😂😂

Use a scribe

the better way i think - i'm french steel carpenter-

Nice trick! I do think if I'm that concerned about the accuracy of the mark, I would use something like a scribe or marking knife rather than a pencil.

But... but... is it legal?

See Tomahawk DIY for the correct method.

Witchcraft!

Why not just divide it by 2

A far easier way is to draw a circle on a piece of paper with your piece of what ever you are using and fold the paper twice and put the paper on the object and there is your center, no need to thank me , it was a pleasure to help out 😂😂😂

Use the center finder, but account for the error when you make your center mark

Really cool

⁉️🔴⛔

13 No one has ascended to heaven but He who came down from heaven, that is, the Son of Man who is in heaven. 14 And as Moses lifted up the serpent in the wilderness, even so must the Son of Man be lifted up, 15 that whoever believes in Him should not perish but have eternal life. 16 For God so loved the world that He gave His only begotten Son, that whoever believes in Him should not perish but have everlasting life. 17 For God did not send His Son into the world to condemn the world, but that the world through Him might be saved.18 “He who believes in Him is not condemned; but he who does not believe is condemned already, because he has not believed in the name of the only begotten Son of God (YHVH, El Shaddai, Adonai, God of Jacob, Isaac, and Abraham). John 3:13-18

thats not perfect . . . .

An overly complicated method and you are still a 32nd off center.

Why not just draw a line across the widest part of the circle, then 180 degrees and do it again, thats it..

This comment has no value to the reader.

You took 3 minutes what should have been said in 10 seconds... Zzzzzzzzzzzz

Negative.....learn how to properly use a marking instrument, namely, the one you plan to use to mark the center.....

still took too long