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Author Topic: .... ARROW SPINE TESTER...?????  (Read 401 times)

Offline getstonedprimitivebowhunt

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.... ARROW SPINE TESTER...?????
« 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.
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"when  "words" are controled ...so are we !"

Offline Jim Curlee

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Re: .... ARROW SPINE TESTER...?????
« Reply #1 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
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Offline freefeet

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Re: .... ARROW SPINE TESTER...?????
« Reply #2 on: March 09, 2010, 01:35:00 PM »
Quote
Originally posted by getstonedprimitivebowhunt:
Also who maked new ones ???? Thanks for Your help.
Ace Spin and Spine Tester.  Good quality bit of kit.
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Shoes are a tax on walking...

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Offline harvestmoon

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Re: .... ARROW SPINE TESTER...?????
« Reply #3 on: March 09, 2010, 05:26:00 PM »
Hey Jim, do you know where I can get a conversion chart...
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Offline MercilessMing

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Re: .... ARROW SPINE TESTER...?????
« Reply #4 on: March 09, 2010, 05:54:00 PM »
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Offline Encino Man

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Re: .... ARROW SPINE TESTER...?????
« Reply #5 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.
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Fox Archery "Red Fox"
53# @ 28" 64" longbow
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44# @ 28" 60" Recurve

Offline stringstretcher

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Re: .... ARROW SPINE TESTER...?????
« Reply #6 on: March 09, 2010, 08:22:00 PM »
Look up Cupcake on here.  He makes the best out there
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Offline Jim Curlee

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Re: .... ARROW SPINE TESTER...?????
« Reply #7 on: March 09, 2010, 09:50:00 PM »
Encino Man, is 100% correct.
Jim
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