Jeff, those tech tips are usually aired during the North American Whitetail shows, I think. All good reviews.
I must admit once again the video trigger my need to get myself a arrow spine tester. One of the tools I don't have myself, unfortunately.
Interesting video. The deflection measured with the standard weight makes sense. When they were rotating the shaft against the plunger (to check straightness I'm assuming), is that done without the standard weight attached?
When they were rotating the shaft against the plunger (to check straightness I'm assuming), is that done without the standard weight attached?
You do it without the weight to check straightness. Spin the shaft with the weight on to check variations in stiffness at different spots on the shaft. Carbons almost always have variations around the shaft. When I refletch carbons, I check to find the stiffest part of each shaft and that's the side where the index fletch goes.
When they were rotating the shaft against the plunger (to check straightness I'm assuming), is that done without the standard weight attached?
You do it without the weight to check straightness. Spin the shaft with the weight on to check variations in stiffness at different spots on the shaft. Carbons almost always have variations around the shaft. When I refletch carbons, I check to find the stiffest part of each shaft and that's the side where the index fletch goes.
Hi, Jeff.
Oh so you attach the weight and spin at various points on the shaft to find the variations? So you just move the shaft up or down on the spine tester, or does the plunger/gauge move? Sorry for my ignorance, I don't have any experience with spine testers.
Oh so you attach the weight and spin at various points on the shaft to find the variations?
That's right. You rotate the shaft to a different axis, then take your fingers off. The plunger on the dial indicator moves up or down according to how much the weight makes the shaft flex along each axis you check, and that makes the needle on the dial move. Read the dial to get the measurment. If the shaft's spine was perfectly consistent the indicator would read exactly the same at each axis. I haven't checked any carbon arrows in a long time but, 5-6 years ago I saw variations up to .035" in spine on the same shaft on medium grade carbons from several different companies. Hopefully they've improved somewhat since then.
When they were rotating the shaft against the plunger (to check straightness I'm assuming), is that done without the standard weight attached?
You do it without the weight to check straightness. Spin the shaft with the weight on to check variations in stiffness at different spots on the shaft. Carbons almost always have variations around the shaft. When I refletch carbons, I check to find the stiffest part of each shaft and that's the side where the index fletch goes.
Hi, Jeff.
Since I got my spine checker that is what I have been doing.
Nice to see you, and your knowledge,in these threads again.
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Nature does nothing uselessly.
- Aristotle -
Arrow Spine- watch this vid
