I can't figure out what words to use to search for a spine chart that relates aluminum shafts to wood arrow spines i.e. 50-55 etc. I'm specifically looking for an aluminum arrow that spines 55ish pounds and is 11/32 diameter near to 400grain at 31". But would be nice to have a spine chart if there is one. I shoot woods almost exclusively but want some aluminum arrows to be able to shoot two classes with little to no change in point on. I know that there is a chart out there I just can't find it

I've got ine I can send you, can't get ut ti embed.

aluminum spin

http://www.arrowskp.com/Spine_Charts.html

Remember that changing arrow length or point weight (you will have to have an insert in aluminum arrow) will change the dynamic spine of the shaft.

Ty sent on. Cameron I wish my spine tester was like that I'll print that

1916 is 53# about the same as your woodies.

2112 is probably as close as you can get and be 11/32 diameter.

Arrows by Kelly had the best one I have seen. Try Googling that, it may still be in the dusty corners of the Internet.

I posted a link to Kellys old site.

Kelly and or arrowmaker will have the answer you seek bd

Kelly's site is nice

I may try some 2013 even though they are 5/16. Are those going to bend easily

11/32= 22/64. The first two digits of aluminum shaft is in 64ths. Therefore, for example, a 1916 is 19/64ths in outside diameter. And a 2016 is 20/64ths in outside diameter. Even a 1916 is only 3/64th smaller in outside diameter. Half that much is the amount that shaft would be closer to your rest or shelf.

2013s do have thin walls, which will make them less durable than the thicker walled shafts. MP

If you go to my website there are pdf files you can download that have the conversions you are looking for. There is also a paper that shows the math that is used to convert between the wood spine and carbon/aluminum deflection.

www.oakcreekarchery.com

Thank you guys when I switched phones I lost all my bookmarks these are great

Best bet is to call Lancaster/Tradtech and get one shaft each of 1916, 2016, etc.

http://arrowskp.com

Kelly's site. A wealth of good straightforward information.

For that 55# ish bow I use 2114's, Jack Howard's favorite as well. But I cut mine at 29". Depending on point/head I get about 500 grains. Your not quite there in diameter. I have also tuned 2213's but had to leave them 30".

I draw 31" I have to have them full length

Pretty simple. You know ur woodies are spined at 50-55@28". Just find an aluminum arrow chart and find what shafts are spine d 50-55lbs@28". If ur wood was spines 50lbs@31" then you use a chart to find aluminum50lbs@31". Aluminums not like carbon. You dont have to play with lsngth and point weight to make the spine you need. Theres more than 1 spine for each length and weight with the point weight you shoot.

To compare aluminum shafts to wood shafts, you need to use the old AMO aluminum spine chart. To find an aluminum that's 11/32 dia. it will need to be a 22 size. The lightest spine you will find is a 2213 AMO spine is 82#@28" @31"its 72#. I don't believe your going to fit the parameters your looking for.

Bob

I think you are right bob I think as long as weight and spine are similar as well as length I'll be good

Ques on the pic of the spine-o-meter it shows the pointer between the 2016 and the 2114 and right on 59lbs but on my spine tester the 2016 scales at 64lbs ,i don't understand this meter can someone expain it .

Shifty: Not all spine testers register the same, even though there is a standard, that being said most all of the testers will work for all practical purposes. Spine is not an exact science and just about every bow will shoot a range of spines, so I wouldn't worry about a few pounds difference.

The meter in question was made by Alan Rothaar some years ago and was very well made, is it correct ? I don't know I've never check it, but I'm sure it will work. The biggest differences I find in different tools is the weight, most don't have an accurate way of weighing it. To get it exactly 2# you need a certified scale that has been sealed by a certified weights/measures tech. Most manufactures will not go to the added expense to accomplish that.

That problem is what caused Easton Archery to change the spine standard to what it is today. They found the weight they had been using for 20-30 years only weighed 1.94# a difference of .06# witch only effected the spine by a pound or so. And is the reason we have so much confusion with spine today.

Bob Bob

Thanks Bob you are always there to help. the 2lb weight on my scale was calibrated in a metalugical lab by a friend at work and the scale was marked using a Starret dial caliper on a jig with the pointer pin contacting the caliper different measures were set to the coresponding defelection specs then the poundage was marked on the scale.So with that being said i guess i am within 3-4 lbs ,close enuff for me. I have found that on some of my aluminum shafts the reading varies by about 2lbs on the same spine shafts.And some of the Eagle shafts spine a lot higher than the spine Easton shafts. Do't mean a lot i just like to play around testing different arrows. Have a good one Bob.

http://www.shootingthestickbow.com/ArrowGuide.html

2213 if you cut at 31, longer 2216

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