Are all spine testers created =?

[overbo]

Man I've been battling this wood arrow thing 4 sometime.I've got a Rothhaar spine tester and have had very few suppliers shafts spine the same as marked.Example,I got a dz of 80-85's that on my tester spined 72-78 and another vendor's shafts where marked 60-65 and the where closer to 50-55.
I once had a supplier that my tester matched up well w/ but he nolonger is in buissness.
Should I find a supplier w/ the same spine tester?

[Falk]

Pretty old and normal problem, I suppose. Besides the fact that spine is clearly defined by formula - and each tester normally should be adjustable to match it - no one actually does, isn't it?!

My advise for you would be:
1) Get yourself any of the modern carbon or alum shafts which closely matches the spine your're after - on your spine tester.
2) Tell the shop you would like to have woodies which spine like shaft XY  - done!

[Guru]

Overbow, I have the same problem...

Falk, Carbons can vary more than woodies! They sometimes make me scratch my head too...

[Cutty47]

Good post!  I've been battling wood arrow spine as well...not happy with my homemade spine tester...

Are the Ace Spine testers any good?

[Hot Hap]

I don't have any trouble with my Ace Spinemaster. Hap

[Falk]

Guru, you got me    
I was talking about something I have no personal knowledge off, as I don't have any carbon arrow at all. I am surprised to hear they have such tolerances though.

Okay Overbo - this leaves you only a got old Easton Alum shaft for comparison (... and I do have - not many, but some of those    )

And if this fails, then you can always do it "my way":

3) Order several dz. shafts and cover the complete range you think it might contain your spine. Spine them out and get rid of the rest or store them for later usage with different bows.

[overbo]

I did exactly that w/ alum's Falk.That's how I ended up w/ the 80-85's that where 72-78's.Their has to be a smith out there that actually spine test woods to match alum. deflection.I've had many heated decussions w/ smiths about tuning woods to my bows.I'm sorry but I'm a diehard bareshaft tuner.I always seem to get the slap a larger fletch on it and call it good.Maybe I'm expecting the impossible?

[ozarkcherrybow1]

All the shafts that I puchased from Troy Breeding were right on the money. I'm not sure what kind of spine tester he used, but hopefully Aeronot will be using the same kind. Watch for him to get up and running and give him a try....Terry

[John Nail]

I made my own tester with a dial indicator. Calibrated it with known XX75 spines, and It has been dead on.

[Grey Taylor]

Have you considered ordering by deflection?  Let them know that with the shaft supported on 26" centers, with a 2# weight on the center of the shaft, XX.XX is the defelction you want.

Guy

[Aeronut]

One thing you should do whenever checking the spine is rotate the shaft so that the 'stiff' side is up.  You can get several different readings by just rotating the shaft on the tester.

Yeah Terry, I plan on using the same setup as Troy whenever I can.  I want to keep up with Troy's quality as much as possible.

Dennis

[Shakes.602]

Kind of like "Ask 4 People, Get 4 Different Answers".      I made one that wouldnt win  ANY  Beauty Contests, but it seems to do the Trick. Ha!  HAD  to be an Accident on My Part that it even Works at All!!    :rolleyes:      

[ringo64]

stay with wood.....or better yet, make some primitive arrows, which are much more forgiving in spine, straightness, weight, etc.  make sure you are setting the arrows the same way on the tester each time relative to the grain.  those are big variances in spine....send them back with a harsh note.