Drawing bow

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wasn't sure what to call these. many times i wanted to draw an arch on a project but even my biggest compass wouldn't do it. so i made a couple of these. made from oak with hooks on each end and some light chain from lowes. bend to the size arch you want and hook the chain on the hook. one is 29" and the other is 46". a simple project that i made in about half an hour.

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

40 Comments

Looks like a parabola or maybe a hyperbola marker.  

Sorry, I couldn't resist.  

--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.

Oh I just cut an arch yesterday and I wish I knew this, haha. I will definitely make one!

No name noobie here

Nice! I have one that I bought that’s made of fiberglass. It’s a great tool to have for long curves!

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".

thanks guys. i made these a few years ago and ive used countless times. ive never seen any you could buy though ?

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

Lee Valley is where I got mine I think. They’re called Drawing Bows, if I remember correctly. 

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".

So your trying to say you're holding the patent on these?
Much handier than trying to find a bucket that matches the arch I need.
Those look really useful, Pottz.
well for small arches a bucket still does the job sometimes. i use these for big arches.

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

Cool - Nice idea with the chain links for the drawing bow.
You've got to call them chainsaws just to carry on the joke though, right?

Bow chain saw.  Duh.  

--Nathan, TX. Hire the lazy man. He may not do as much work but that's because he will find a better way.

changed the name to drawing bow, makes more sense.

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

Those look great P!

I've been trying to buy the LV bows for years, but every time I try due to free ship or other promotion, they are out-of-stock.

Tried making my own a time or two, but the wood I used always was not consistent enough for a truly smooth arch. 
Since I've been using the laser lately for < 2' wide arches, I haven't really needed one. 
I think the reason they’re fiberglass is so they’re consistent. I tried making them with wood, but it seems like you don’t get a perfectly uniform bend. Densities and whatnot…

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".

i dont know the oak has given me a nice curve ? like i said i never even knew you could buy em !

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

Looks good Pottz. Yep..Drawing Bow is what they are called. Lee Valley sells them
https://www.leevalley.com/en-ca/shop/tools/hand-tools/marking-and-measuring/marking-accessories/44631-lee-valley-drawing-bows#share-modal

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Nice woodworking appliance, these type of self made "jigs" are very handy. 
Great idea! I use the Lee Valley versions but they don't last forever.. the straps break, usually. I like the chain idea. 

Angellos

yeah wow ! who wants some for 52.50 ? ill make all you guys want for that price ! chain will last a lifetime !

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.

If these fail to yield a perfectly smooth curve (draw a line, flip it end for end, and see how close it comes to the line), you can sand/shave a bit of wood from the stiffer side.  Archers call this tillering a bow.  

On the other hand, if you are looking for an asymmetric curve, exaggerate the effect by thinning the thinner side - think of it as a redneck French curve.

Huh? Whadaya mean it ain't "measure once cut twice"?

good idea mike, thanks !

working with my hands is a joy,it gives me a sense of fulfillment,somthing so many seek and so few find.-SAM MALOOF.