April 12th, 2012, 08:31 AM
Jig is very heavy. The steel posts are tough as nails and I've had little to no flex.
Originally Posted by julle
Compound: Mathews Drenalin LD - BLACK on BLACK
Recurve: Hoyt Helix and Nexus; G3 Limbs
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April 12th, 2012, 08:48 AM
I have a homemade jig which used 1x2 for the arms and 5/16" bolts for the posts. The wooden arms will flex a little, but the steel bolts flex noticeably more than the wood. My wooden arms are 15" long, and I suspect if I shortened them 2" to have the posts 11" on center, the wood would flex even less. And 3/8" bolts (or even 1/2" bolts) would flex less. But yes, in my experience, you're right - the bolts are more apt to flex than the wood.
Originally Posted by julle
That said, however, one of the drawbacks I have found with my jig is that it's overall too light, so when I'm building a string, I put a couple screws through the feet and secure it to the workbench so it won't move as I'm pulling strings tight. Viper's jig, if it's substantially heavier, might alleviate the need to do that.
April 12th, 2012, 10:21 AM
A friend of mine did use 2x2"s, there was more flex; not terrible, but noticeable. The fact that the forces are trying to bend a thicker dimension does help. The 3/8" bolts don't bend (at all), and the only real flex point is the junction between the bolts (uprights) and the cross members. A way of reducing that would be to take a 1 - 1.5" diameter dowel a few inches long, drill a 3/8" hole down the middle, slip the 3/8" bolt through it and glue it to the cross member. While an option, it don't think it's worth doing, unless someone really feels the flex is too much.
As for the metric system, kinda depends on what you grew up with. I still prefer SAE wrenches...
Also, I find that a single "C" clamp holds it to my work bench nicely.
Lastly regarding the version in my book: After using that model for about 30 years, I did wind up stiffening it by bolting a 2x4" to the base pieces. That, plus the oak dowels and cross members held up well. Just wanted one that was easier to build with even less flex.
“Simple and innocent, however, as it (the bow) appears, and capable as it is of being a trusty friend and ally, a bow is at the same time a watchful enemy, ready to take advantage of the smallest slight.”
April 13th, 2012, 12:14 PM
yup that's a pretty cool jig and about all you need for recurve strings.
here is a similar one I typed up for the 4H kids.
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April 13th, 2012, 04:16 PM
Nice design, nicely explained. I expect I'll be making that one with my kids come summer. Thanks.
Originally Posted by b0w_bender