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How do you make a Circular Frame

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Forum topic by Ken Fitzpatrick posted 04-11-2012 02:52 AM 3296 views 0 times favorited 6 replies Add to Favorites Watch
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Ken Fitzpatrick

373 posts in 2777 days


04-11-2012 02:52 AM

I guess the question is: Is there a formula to figure out how wide and long pieces need to be in order to glue them up, then trim them into a circle. Not sure I phrased that right but I want to make a circular frame that is about 20”to the outer edge in diameter and facings that are 1 1/2” wide.

No one is going to use a solid piece of wood because there would be too much waste. There has to be a formula to come up with the length and with of pieces to be glued up so you can trim into a circular frame. I guess I’ve said it now a couple of times and hope that I have explained what I’m trying to figure out.

Thanks in advance for any advice/assistance you could share with me.

Ken

-- • "I have noticed that nothing I have never said ever did me any harm."....... Calvin Coolidge


6 replies so far

View TCCcabinetmaker's profile

TCCcabinetmaker

925 posts in 1108 days


#1 posted 04-11-2012 03:02 AM

make two half circles then dowel them together, make it a little larger then trim it down, so if you want a twenty inch circle (I guess you mean the outside circumfrance) then make a 21 inch half circle. and trim it down, make sure your dowels are well inside the 20 inch mark.

Now if you mean a 20 inch inside circumfrance, then you’re going to need to make a 24 inch half circle that you can trim down to what will be 23 inches..

-- The mark of a good carpenter is not how few mistakes he makes, but rather how well he fixes them.

View Ken Fitzpatrick's profile

Ken Fitzpatrick

373 posts in 2777 days


#2 posted 04-11-2012 03:25 AM

Johathan that is exactly what I was looking for. Any way I could get the sketchup file from you. once I see how you did it I could modify it I would think for any size. Thanks so much for answering.

TCC I actually thought about that and if I couldnt get what I was looking for I would have gone that route. Thanks for answering.

BTW both of you have some awsome projects.

Thanks again

Ken

-- • "I have noticed that nothing I have never said ever did me any harm."....... Calvin Coolidge

View Tootles's profile

Tootles

719 posts in 1255 days


#3 posted 04-11-2012 10:29 AM

Ken, Have a look at this blog and this blog, both done by Sam Shakouri. These have the formulae.

-- I may have lost my marbles, but I still have my love of woodworking

View Ken Fitzpatrick's profile

Ken Fitzpatrick

373 posts in 2777 days


#4 posted 04-11-2012 11:02 AM

Thanks Tootles. I think I understand the drawing in the second one. It makes sense, but I’ve never been a real math whiz. Will study it until I figure it out. Jonathan’s post gives for me a much easier way and I am trying to learn sketchup so I could two birds with one stone. I amstill however a firm believer in using tools like sketchup to accomplish things but still want to know the real/old way of doing things. Thanks again for responding.
Ken

-- • "I have noticed that nothing I have never said ever did me any harm."....... Calvin Coolidge

View KnickKnack's profile

KnickKnack

994 posts in 2320 days


#5 posted 04-11-2012 11:09 AM

If all those seem too easy, GaryK did this amazing piece of work…

-- "Do not speak – unless it improves on silence." --- "Following the rules and protecting the regulations is binding oneself without rope."

View gfadvm's profile

gfadvm

11552 posts in 1444 days


#6 posted 04-12-2012 02:03 AM

Jonathan, That is impressive. I thought Rance was the only one who could do magic tricks like that!

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

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