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Main Boards => The Bowyer's Bench => Topic started by: skeaterbait on May 23, 2009, 12:04:00 PM

Title: Lam bow handles and glue lines
Post by: skeaterbait on May 23, 2009, 12:04:00 PM
Ok, so I have built my form and have things ready to try a laminate bow, but I am finding that getting the handle to conform perfectly to the form is quite a daunting(sp?) task.

No matter how much I sand and tweak I always end up seeing a bit of light somewhere along the front edge of the handle where it will meet the lam.

How crucial is that the fit be completely perfect?
Title: Re: Lam bow handles and glue lines
Post by: Apex Predator on May 23, 2009, 01:05:00 PM
You only need to get it as close as you want your glue lines to be, because if you see light, you will probably have a thick glue line.
Title: Re: Lam bow handles and glue lines
Post by: kennym on May 23, 2009, 04:34:00 PM
Yep, what Marty said, it won't show as bad on dark woods tho.

You might try laying the riser in the form,and taking a thin shim and a pencil and marking the riser with a line to sand to. The shim only needs to be as thick as the largest void.

Hope that made sense!!
Title: Re: Lam bow handles and glue lines
Post by: Holm-Made on May 24, 2009, 01:52:00 AM
Lining your form with 1/8" of rubber helps make it a little more "forgiving" as well.  Chad
Title: Re: Lam bow handles and glue lines
Post by: razorsharptokill on May 25, 2009, 06:16:00 PM
I've got access to some soft rubber about 3/16" thick. I have thought about cutting some to place on my form. The top of my form is aliminum, what glue would hold up to the heat? I used 3M spray contact cement on the alum. but had some issues with it pulling away from the board along the low contours.
Title: Re: Lam bow handles and glue lines
Post by: Canadabowyer on May 25, 2009, 06:56:00 PM
Cut a peice of 80 grit sandpaper and tape it to your form with double sided carpet tape. It should be a little longer than your riser. Then set the riser on it and sand back and forth moving the riser only 1/2 inch or so. You will be able to get it very close this way.Good luck, Bob
Title: Re: Lam bow handles and glue lines
Post by: Dano on May 25, 2009, 08:25:00 PM
Canadabowyer, has a great tip, it's an old woodworkers trick for mating surfaces.
Title: Re: Lam bow handles and glue lines
Post by: razorsharptokill on May 25, 2009, 09:58:00 PM
If you have a taper between the riser and the glass/veneers, make sure you take that into account. On the form I built from Kenny's plans, the .002 taper is glued directly to the riser. If I mate my riser block to the form w/o the taper under it the contour of the riser is off and leaves a gap toward the fades.