Spine testing carbon arrows
 

With the talk lately about inconsistant spine in cheaper carbon arrows (all I can afford), how do some of you arrow gurus go about testing the spine on your arrows? If you knew where the weak/strong side was you could refletch accordingly to at least make them all flex to the weak or strong sideand should see an increase in accuracy. But how do you find the weak/strong side?

I do have a ball bearing spin tester I use for aligning broadheads, would this be of any help?

Or am I making a big deal out of nothing? Am I better off just to number my arrows and shoot the hound out of them untill I findthe majoritythat shoot together and zero for that?

Everthing is tuned up and shooting well, I am just trying to take the accuracy up to the next level.

RE: Spine testing carbon arrows
 

Only 5 views and no replies? I guess it is not an issue...

RE: Spine testing carbon arrows
 

I use a homemade spine tester that applies weight to the center of the shaft over a dial indicator.

RE: Spine testing carbon arrows
 

Details? Picture?

RE: Spine testing carbon arrows
 

If you do not have access to a spine tester, there is another way, but it is done by feel. Get three roller bearing that will fit over the shaft with a little bit of friction. Put one on each end and one on the middle of the shaft. Elevate the two end bearings and push down on the middle bearing. The weak side should be facing down. Try twising (turning) theshaft to confirm. Mark the strong side with a marking pen and test it a few times. You may also find some "secondary" spots on the shaft. This where the feel part comes into play.

RE: Spine testing carbon arrows
 

Okay bob, thanks. I've got a spin tester that I can modify to do something very similiar. Good idea.