Author Topic: What to use for a bow form  (Read 541 times)

Online Mad Max

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What to use for a bow form
« on: September 06, 2019, 05:03:44 PM »
what do you use??????????
I have used 7 ply, 3/4" plywood but I still get some warping.
Do you think 1/4" plywood would be better?


See the 1" wide strap left to right on the lower form.
bolted to the form on each end and a push bolt to take out the curve (left to right)
"nothing ventured ,nothing gained"

Online Forwardhandle

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Re: What to use for a bow form
« Reply #1 on: September 06, 2019, 06:22:18 PM »
I have never used plywood in a form but use 1" dimensional sugar maple boards laminated together & never hade any movement on them ,I don't know how wide your going but two 1" boards comes out at 1 1/2 " 
If you fear failure, you will never try ! But never except it!!

Online Bob T.

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Re: What to use for a bow form
« Reply #2 on: September 06, 2019, 07:43:22 PM »
That strap really does not do much. I have always used angle iron from old bed frames bolted threw the bottom of my bow forms.

Online Mad Max

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Re: What to use for a bow form
« Reply #3 on: September 06, 2019, 08:24:21 PM »
That strap really does not do much. I have always used angle iron from old bed frames bolted threw the bottom of my bow forms.

Bob the form, using a straight edge has about 1/16" gap in the middle (centerline of the form) , the bolt is pushing on the middle of the form. back into place.
I have used 2" angle iron but it does not do as good as this strap.
"nothing ventured ,nothing gained"

Online Bob T.

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Re: What to use for a bow form
« Reply #4 on: September 06, 2019, 09:30:05 PM »
max, When I looked at your picture of your form I did not see your adjustment bolt. I though the strap was just bolted to the side, sorry.
Bob

Online Shredd

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Re: What to use for a bow form
« Reply #5 on: September 06, 2019, 10:44:53 PM »
Do you put your forms in an oven??  How many degrees???  Do you ramp up the heat fast or slow and steady??

Online monterey

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Re: What to use for a bow form
« Reply #6 on: September 06, 2019, 10:54:02 PM »
I like the strap.
Monterey

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Online Mad Max

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Re: What to use for a bow form
« Reply #7 on: September 06, 2019, 11:21:16 PM »
Do you put your forms in an oven??  How many degrees???  Do you ramp up the heat fast or slow and steady??

I don't think I put that one in the oven ever.
My hot box takes 1 hour to come up to temp. with the form in. 180*
Check your forms with a long straight edge.
With the high reflex and static recurves I always check my forms, I have some other ones with straps too.
Plywood warps, some of my pattern sanding templates warp also.
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Offline OkKeith

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Re: What to use for a bow form
« Reply #8 on: September 06, 2019, 11:37:23 PM »
The one form I built I used three quarter MDF. I glued two pieces together and then used a pattern and patterning router bit to cut the bow shape. I don't use air hose though, just rubber bands and bicycle inner tubes.

That looks like there is a lot of force in that system when it gets all aired up!

Who was it that posted a solid aluminum form? I bet that doesn't warp any.

OkKeith
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Offline hunting badger

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Re: What to use for a bow form
« Reply #9 on: September 07, 2019, 01:35:53 AM »
I use LVL on all my newer forms, I haven't had a problem to date.

Online Walt Francis

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Re: What to use for a bow form
« Reply #10 on: September 07, 2019, 12:12:17 PM »
I use LVL and bolt a 1 1/2” angle along the full length of the bottom
The broadhead used, regardless of how sharp, is nowhere as important as being able to place it in the correct spot.

Walt Francis

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Online bamboo

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Re: What to use for a bow form
« Reply #11 on: September 13, 2019, 05:45:38 PM »
i've had good luck with laminated spruce scaffold planks--very stiff and true
Mike

Online Mad Max

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Re: What to use for a bow form
« Reply #12 on: September 13, 2019, 06:08:46 PM »
Thanks for the info guy's
"nothing ventured ,nothing gained"

Online Flem

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Re: What to use for a bow form
« Reply #13 on: September 14, 2019, 10:26:10 AM »
One word, Plastic.




Online Roy from Pa

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Re: What to use for a bow form
« Reply #14 on: September 14, 2019, 10:33:54 AM »
One word, Clamps..




Online Crooked Stic

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Re: What to use for a bow form
« Reply #15 on: September 14, 2019, 12:32:27 PM »
 :notworthy:
High on Archery.

Online Flem

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Re: What to use for a bow form
« Reply #16 on: September 14, 2019, 05:42:20 PM »
That looks like a torture device. And I'm not sure if the Bow is the thing that got tortured :bigsmyl:

Online Roy from Pa

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Re: What to use for a bow form
« Reply #17 on: September 14, 2019, 06:03:39 PM »
Nock it off, Clem..... :)

Offline Robertfishes

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Re: What to use for a bow form
« Reply #18 on: September 14, 2019, 11:01:09 PM »
I have only used Cabinet grade plywood myself.. along with a thin "filler piece" of thin wood like a door skin if needed to make thickness. I use tite bond 2 glue and lots of wood screws, if building a 1 3/4 inch wide form i use 1.5" screws put in from both sides. I think glue alone is not enough for a multi piece bow form, I have a bow oven and heat up to 160 degrees.  Bowyers with big wide belt sanders can build forms thick and sand it down to correct thickness.  LVL is used by lots of successful bowyers. 

Online Mad Max

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Re: What to use for a bow form
« Reply #19 on: September 14, 2019, 11:17:21 PM »
Thanks Robert
 :thumbsup:
"nothing ventured ,nothing gained"

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