Text only | Text with Images

Trad Gang

Main Boards => PowWow => Topic started by: getstonedprimitivebowhunt on March 09, 2010, 10:28:00 AM

Title: .... ARROW SPINE TESTER...?????
Post by: getstonedprimitivebowhunt on March 09, 2010, 10:28:00 AM
I have a old spine tester. whats the best way to calibrate it. Should I just put different known ### shafts on and mark curved arm with each ##### ???. Also who maked new ones ???? Thanks for Your help.
Title: Re: .... ARROW SPINE TESTER...?????
Post by: Jim Curlee on March 09, 2010, 11:09:00 AM
You can use a dial indicator, to check the deflection of your shafts.
Then convert the shaft deflection into pounds.
Jim
Title: Re: .... ARROW SPINE TESTER...?????
Post by: freefeet on March 09, 2010, 01:35:00 PM
QuoteOriginally posted by getstonedprimitivebowhunt:
Also who maked new ones ???? Thanks for Your help.
Ace Spin and Spine Tester.  Good quality bit of kit.
Title: Re: .... ARROW SPINE TESTER...?????
Post by: harvestmoon on March 09, 2010, 05:26:00 PM
Hey Jim, do you know where I can get a conversion chart...
Title: Re: .... ARROW SPINE TESTER...?????
Post by: MercilessMing on March 09, 2010, 05:54:00 PM
http://www.rosecityarchery.com/AMOspine.html
Title: Re: .... ARROW SPINE TESTER...?????
Post by: Encino Man on March 09, 2010, 06:06:00 PM
On an AMO scale it's two holding points at 26" divided by the deflection using a 2# weight. Example 26/.500=52# spine

There is also an ASTM scale used for carbons that uses 28" spacing with a 1.94# weight.
Title: Re: .... ARROW SPINE TESTER...?????
Post by: stringstretcher on March 09, 2010, 08:22:00 PM
Look up Cupcake on here.  He makes the best out there
Title: Re: .... ARROW SPINE TESTER...?????
Post by: Jim Curlee on March 09, 2010, 09:50:00 PM
Encino Man, is 100% correct.
Jim
Text only | Text with Images