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Main Boards => The Bowyer's Bench => Topic started by: D.A. Davis on July 23, 2010, 09:43:00 PM

Title: String Groove Angle
Post by: D.A. Davis on July 23, 2010, 09:43:00 PM
Does anybody know what the angle is for your string grooves?  I thought I'd better ask before I strart filing them out.  I've got mine marked at 37 degrees.  That looks about right to me.

D.A.
Title: Re: String Groove Angle
Post by: Rainshooter on July 23, 2010, 09:55:00 PM
Mr Krewson will be on shortly to show you how to figure it out I'm sure. Basically if you have an overlay on the back of the bow file that nock out first, then string up the bow and use a pencil to trace where the string lays against the sides of the bow.
Title: Re: String Groove Angle
Post by: George Tsoukalas on July 23, 2010, 10:04:00 PM
I measure 1/2 inch from the tip in, measure 1/4 inch down, draw a diagonal hopefully the right way, make a pilot cut with a hacksaw and widen with a 1/8 inch file. More on my site. Jawge
http://georgeandjoni.home.comcast.net/~georgeandjoni/
Title: Re: String Groove Angle
Post by: Eric Krewson on July 23, 2010, 11:31:00 PM
(http://img.photobucket.com/albums/v181/ekrewson/stringnocklocater.jpg)
Title: Re: String Groove Angle
Post by: Shaun on July 23, 2010, 11:54:00 PM
Gonna be close enough with an eyeballed 45 degree.
Title: Re: String Groove Angle
Post by: GREG IN MALAD on July 24, 2010, 12:53:00 AM
(http://i818.photobucket.com/albums/zz110/greginmalad/back%20yard/100_0607.jpg)
55 degree's works best for me.
Title: Re: String Groove Angle
Post by: Swissbow on July 24, 2010, 05:50:00 AM
I do mine like Eric. This way you always have the right angle according to  the length of the bow. Make sure that all the sharp edges in the string groove are well rounded to prevent string wearing.

----------
Andy
Title: Re: String Groove Angle
Post by: kennym on July 24, 2010, 08:06:00 AM
Mine end up kinda like Gregs.

I use a combo square to mark 45 on the limb edge,then round the groove on the belly toward the center of the bow. Ends up with a smooth place for the string at full draw(like Gregs)

Greg, NICE TIP!!
Title: Re: String Groove Angle
Post by: GREG IN MALAD on July 24, 2010, 12:07:00 PM
Thanks Kenny,
My string grooves actually use 2 different angles. The inside of the groove(toward the handle) is 55 degree's. The outside of the groove(toward the tip) is closer to 80 degree's. This creates a groove that is wider at the belly side of the limb, which gives room for the string to move at full draw.
Title: Re: String Groove Angle
Post by: kennym on July 24, 2010, 12:36:00 PM
Same here, mine may not look that good tho!
Title: Re: String Groove Angle
Post by: greyhawk39 on July 24, 2010, 02:27:00 PM
I use the chain saw guide to get me started.
Title: Re: String Groove Angle
Post by: greyhawk39 on July 24, 2010, 02:29:00 PM
"Photobucket"
Title: Re: String Groove Angle
Post by: greyhawk39 on July 24, 2010, 03:14:00 PM
3rd time is the charm.

(http://i562.photobucket.com/albums/ss64/greyhawk39/SANY0055-2-1-1-1-1-1.jpg)
Title: Re: String Groove Angle
Post by: D.A. Davis on July 24, 2010, 08:20:00 PM
Well, one thing has become apparent to me, and that's the limb tips are the hardest part of making a bow.  My hats of to you guys.  Here's some phone pics of my first attempt at limb tips.  I hope I get  better at it, because I sure can't get any worse.

(http://i11.photobucket.com/albums/a178/bayman1975/07-24-10_1855.jpg)

(http://i11.photobucket.com/albums/a178/bayman1975/07-24-10_1854.jpg)

(http://i11.photobucket.com/albums/a178/bayman1975/07-24-10_1856.jpg)
Title: Re: String Groove Angle
Post by: Rain Man on July 24, 2010, 10:21:00 PM
Really looks cool, but I think its bulky.  Heavy tips = slower speed.