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Author Topic: Affordable spine tester or build?  (Read 812 times)

Offline razorsharptokill

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Affordable spine tester or build?
« on: November 01, 2020, 08:16:59 AM »
Looking at spine testers and WOW, they are pricey. Anyone have any plans for a DIY build? I wouldn't mind buying one but I think I can build a simple one.
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Offline Overspined

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Re: Affordable spine tester or build?
« Reply #1 on: November 01, 2020, 08:46:12 AM »
I think mine was $100. Worth it

Offline slowbowjoe

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Re: Affordable spine tester or build?
« Reply #2 on: November 01, 2020, 06:20:12 PM »
I had a previously owned, old Ace 101; I didn't bond with it (not knocking Ace, I like, and own, other stuff of theirs). Ended up rigging my own: I used the Ace frame as the support and spin tester, and a set of digital calipers from an auto parts store to measure deflection. Works just fine.

If I were to buy one now, I'd still go for the lower priced Ace. Or, I would rig a simple home made spin tester/support, and stay with the digital caliper for readings. Probably cost about half as much this way. The 2 lb. weight should be easy to come up with. The Ace would be more convenient, the home made =, I believe, just as accurate, bit a tad slower to use.

Pretty sure there are some threads, if you search, for ideas here.

Online Gdpolk

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Re: Affordable spine tester or build?
« Reply #3 on: November 01, 2020, 08:40:01 PM »
I've done both between buying them and building them.  They all work the same when properly made.  It's really only a 26" span, 2lb weight, and a measuring devise to measure deflection. 

One of mine over the years was literally two brass hooks in the front of my workbench and a coffee can with picture hanging wire filled with nuts/bolts until my digital scale gave me the right weight.  Then I set a dial indicator with stand on the bench and just cross referenced the charts.  It cost me $1 at the hardware store for the brass hooks and it worked exactly the same as my store bought one that I use now.
1pc and 2pc Sarrels Sierra Mountain Longbows - both 53.5lbs @ 29"

https://www.gpolkknives.com/

Offline razorsharptokill

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Re: Affordable spine tester or build?
« Reply #4 on: November 03, 2020, 10:20:19 AM »
I Ordered a dial indicator and will build one when I get home from my military orders. Thanks guys.
Jim Richards
Veteran

USMC 84-88
Oklahoma Army National Guard 88-89
USMCR 89-96 Desert Storm
Oklahoma Air National Guard 2002- present. Operation Iraqi Freedom 2005(Qatar) and 2007(Iraq),
Operation New Dawn Iraq 2011,
Operation Enduring Freedom 2018 Afghanistan.
NRA Life Member.

Online Pat B

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Re: Affordable spine tester or build?
« Reply #5 on: November 03, 2020, 11:24:40 AM »
Jim, I believe there is plenty of info on building spine testers on YouTube. Some simple, some complicated.
Make the most of all that comes and the least of all that goes!
TGMM Family of the Bow

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