Its show us you're Spine jig Time

[Antonio]

Mainly because I am thinking of getting a spine tester .I have been looking at prices for shafts and then looking at prices of Spine testers then back to shafts prices back to spine testers then back to shafts .And considering that I have two bows and a 55 lbs and a 80lbs longbow and a 113lbs longbow on the way .And the prices of shafts .

I am thinking the next logical conclusion is to make my own that way I can never run out and I don't have to count on external factors affecting it like prices.

There is also a part of me that wants to make a home made spine testing kit .

I don't know if any body has trodden down this path before .There is always a chance some one has made their own home made spine tester .Or maybe I thought of it first .You never know.

[clinton miller]

search the 'how to' forum on tradgang. they have home made spine testers in there.

[Glenn]

Antonio, contact Little Arrows on this forum and ask her if Steve will make one. I think Steve's spine tester is still the best one I have seen...Glenn...

[woody]

The easiest spine tester is a block of 50mm X 100mm X 300mm timber, nailed to your shed wall, with a 3/8" hole horizontally drilled into its side.

Borrow some alloy shafts of known spine, eg

2219 = .340
2117 = .400
2018 = .460
2016 = .530
Insert the shafts into the hole in the wood block and hang a 12" shifting spanner off the nock end of them

Put a texta mark level with the amount of shaft bend ( deflection) with the weight of the shifter is on it. The only criteria is the shafts be of the same length, and you label each mark, 2219 texta mark =.340 etc.

Now by comparing the amount of bend of your wood shafts, to the texta marks labelled on the wall, it should be pretty easy to get a very close estimate of static shaft spine.

You could even just put the texta mark from one arrow that you know flys nice out of your bow, and still have a measure of how stiff or how weak a shaft is, relative to the reference arrows mark.

[Gringa Bows]

i just bought mine off keith forrester (Forro)off here,dont know if he's still selling them though.......................Rod

[Mike-dy]

Heres a pic of my home made one, If you search here you'll find more that others have made.