Primitive Archer

Main Discussion Area => Bows => Topic started by: The Burnt Hill Archer on October 10, 2009, 09:57:14 am

Title: urac 185 and heat treating
Post by: The Burnt Hill Archer on October 10, 2009, 09:57:14 am

ive got a hickory/osage bow that came out a bit light. i was wondering if i heat treated it if it would weaken the glue line. i had heard before that you can heat urac and it wouldn't soften, but i just wanted to make sure. 

Thanks!
Phil

Title: Re: urac 185 and heat treating
Post by: artcher1 on October 10, 2009, 02:38:34 pm

You can "flash" temper the limbs Phil. Doesn't take but about 10 minutes or so to do a limb. Keep your heat gun very close to the wood and this helps prevent the heat from running over the edges. Be sure to give your limbs a little reflex or setback as you're warming up the limbs. You're just looking for a little color change and with no scorching. Good luck. ART

Title: Re: urac 185 and heat treating
Post by: sulphur on October 10, 2009, 02:44:57 pm

Urac will actually stand quite a lot of heat.  I use it when making risers for F**** G**** bows cause u can heat it a few times with no problems.  I would suggest the flash tempering also.  I use a propane torch  and just scorch it with out letting the heat soak in too long.  also i have used my gas grill.  should work ok, but i have only tried it a few times.  don't forget the reflex when heating it thats where you will gain your weight back.

Title: Re: urac 185 and heat treating
Post by: Pat B on October 10, 2009, 02:47:34 pm

...and don't forget to give the bow plenty of time before stressing it. A few days at least if you are in a humid area. More for dry areas.

Title: Re: urac 185 and heat treating
Post by: The Burnt Hill Archer on October 10, 2009, 05:24:45 pm

thanks for the info all. I had talked to Jerry Brumm of Great Northern Bowhunting, he uses urac for their wood to wood lams. he told me that heat to a certain degree wont effect the glue. this plays right in with what you all are saying.

i just gave it a try. i put it into some reflex, and held the heat gun about 1 to 2 inches away, moved it back and forth pretty quickly till it was gettin that nice golden brown. took maybe 3 min. i was also having some problems with it not bending enough in the outer 3rd, so i only did the inner 3rd to the middle of the limb. its cooling down now, and ill let it sit in the form overnight. then let it re-hidrate for a couple days. ill let you all know how it went.

the hickory didnt get hot at all, so im not worried about the glueline creaping.

thanks again!
Phil

Title: Re: urac 185 and heat treating
Post by: Ryano on October 11, 2009, 09:05:37 am

I've actualy bent mild recurves into laminated bows glued with urac, it should be fine.