spining arrows

[bucksbuouy]

Can anyone recommend a simple way to determine spine on raw shafts? Ive heard of people doing it with two nails in the wall and just measuring the deflection but what amount of deflection equals what spine? Thanks gang.

[Hot Hap]

If you have a aluminum shaft, start with that one with a known spine. Hang your weight on it and mark the deflection on wall. Compare to your raw shafts.

[reddogge]

Here is a chart if you scroll down far enough.

 http://www.jamesmhill.com/Spine_Tester.html

[bucksbuouy]

thats exactly what I was looking for reddogge and a good idea too Hot Hap. thank you.

[Rob DiStefano]

the only concern with checking shaft spine is shaft concentricity.  if the shaft isn't true, you won't be able to get an accurate spine check.

with my home made spine meter, i read known good shafts that fly well outta my bow(s), note the meter deflection, duplicate with other shafts.  spine deflection will probably be different for different shaft materials!  iow, carbon shafting has very different dynamic and static spines!

[SCATTERSHOT]

here is a spine chart with common aluminum sizes spined like you would spine a woodie...


Shaft
Size     Spine        Old GG or 24SRT Spine
1616       32#
1716       38#
1718       42#
1816       44#
1818       50#
1916       53#         55#
1918       60#
1920       65#
2016       61#         63#
2018       67#         70#
2020       77#         80#
2114       64#  
2115       70#  
2117       81#         83/84#
2216       84#         86#
2219       95#         98#

[fish n chicks]

This is what I came up with not too long ago bucks. It has spined a ton of arrows for me, and i didn't have to spend $200+.

 http://tradgang.com/noncgi/ultimatebb.php?ubb=get_topic;f=125;t=004573#000000

Hope this helps.