Primitive Archer

Main Discussion Area => Bows => Topic started by: bow101 on April 26, 2014, 11:17:56 pm

Title: Glue Up
Post by: bow101 on April 26, 2014, 11:17:56 pm
In the process of gluing up a Tri-lam 2 maple with oak core.  One of the maple lams is slightly thinner,  should the thinner one be used for the back......or the belly..?  I'am thinking Back.   ???
Title: Re: Glue Up
Post by: adb on April 27, 2014, 01:17:19 am
The thinner lam would be best on the back, yes.
Title: Re: Glue Up
Post by: adb on April 27, 2014, 01:21:28 am
Do you have access to a better, more compression strong belly wood?
Title: Re: Glue Up
Post by: mikekeswick on April 27, 2014, 04:26:51 am
There ain't nothing wrong with maple for a belly  ;)
Trap the back and the belly will hold up just fine.
Thinner for the back yes.
Title: Re: Glue Up
Post by: DarkSoul on April 27, 2014, 07:02:51 am
Yes, use the thinner lam for the backing.
What thickness are the three lams each? You need to be careful to not scrape off the majority of the belly lam during tillering. Personally, I use a backing and core that are both about 1/8" thick and a belly lam that is at least twice that thickness.
Title: Re: Glue Up
Post by: adb on April 27, 2014, 11:52:51 am
Quote from: bow101 on April 26, 2014, 11:17:56 pm
In the process of gluing up a Tri-lam 2 maple with oak core.  One of the maple lams is slightly thinner,  should the thinner one be used for the back......or the belly..?  I'am thinking Back.   ???

What type of bow are you planning to make? ELB? Flatbow?
Title: Re: Glue Up
Post by: Dances with squirrels on April 27, 2014, 11:57:42 am
Yes, a thicker piece on the belly will allow material for removal while tillering or reducing weight wihout going through to the glue line.
Title: Re: Glue Up
Post by: bow101 on April 27, 2014, 05:45:41 pm
Quote from: adb on April 27, 2014, 11:52:51 am
Quote from: bow101 on April 26, 2014, 11:17:56 pm
In the process of gluing up a Tri-lam 2 maple with oak core.  One of the maple lams is slightly thinner,  should the thinner one be used for the back......or the belly..?  I'am thinking Back.   ???

What type of bow are you planning to make? ELB? Flatbow?

R/D bow.......using maple for both.  Last maple R/D was only 2 lams with cloth backing, but seems ok, just want to do a tri-lam easier to get the reflex in.

Quote from: DarkSoul on April 27, 2014, 07:02:51 am
Yes, use the thinner lam for the backing.
What thickness are the three lams each? You need to be careful to not scrape off the majority of the belly lam during tillering. Personally, I use a backing and core that are both about 1/8" thick and a belly lam that is at least twice that thickness.

Core is 1/8"   Belly lam is not quite double thickness.  I'am thinking it should be ok for a shorter bow around 64-62 @ 45#