Spine tester

[Jeremy K]

For awhile now I've wanted to build a fixture ,kind of an all in one type deal to check spine ,cut to length and check straightness. I really don't have a ton of time to work on it these days but I will add pictures as I go. The next step is to build the weight that hangs from the arrow and make a mount for the dial indicator to attach to.

[philoshop]

I like it a lot! Check the knock/point/broadhead as well. Nice job!

[grampy]

Looks great so far! Good idea, and I'm sure it will work just fine!

[The_Real_TCIII]

I have a spin tester I bought from a guy on AT, was it you? Looks just like that lol

[Lawdwaz]

Looks good Jeremy!

I used to have an Adams Spine Tester.  Got it at the Little Valley Trappers Convention with a bunch of other neat stuff; sold 95% of it on ebay and made a killing.

I do have an Apple arrow cutoff saw I got off another web site.  Haven't used it yet but might soon as I do need to fletch up another half dozen shafts.  IIRC I have to fabricate a part for it before it'll work accurately.  I better pull it from the rafters and dust it off........................

[Jeremy K]

1 hour ago, The_Real_TCIII said:

I have a spin tester I bought from a guy on AT, was it you? Looks just like that lol

Not me , I wanted to build the spine tester and use it before I drop the coin for a vane master pro fletching jig.

[The_Real_TCIII]

[Jeremy K]

I was able to find a half hour at work to knock out the lugs that locate the uprights in the slot, just got them squared up and screwed down,should work nicely.  I gotta get back over to the mill hopefully soon and make the weight next.

[dbHunterNY]

I've got a cheap plastic spin tester.  works but nothing like a heavier metal one that's not as finicky.  that's awesome you can make stuff like that.  haven't had those kind of resources since college when had access to a machine shop.  I don't test spine. just make sure it spins true and weigh as close to the same as possible.

[Jeremy K]

I knocked out a quick weight for the spine tester today at work (boss is on vacation) I'll get one of my indicators later and see how it works . You can actually feel it when you spin the arrow when it hits the spine plane ,pretty cool.

[Jeremy K]

My next project is to get the chop saw so that it can be mounted to the T track and make the holders for the arrow to spin on while cutting to length. The T track will be the center of the work station and then I'll be able to swap out components depending if I'm checking spine or cutting to length.

[The_Real_TCIII]

That's really impressive!


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[mlammerhirt]

You need to produce a few and sell them on here! Let me know when you are taking orders.

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[Jeremy K]

I picked up a cheap indicator to check it out ,I think I'm gonna make a base for it that mounts to the side T slot . This arrow had a .015 though deflection from the spine to the weak side.

[dbHunterNY]

On ‎8‎/‎23‎/‎2016 at 6:23 PM, Jeremy K said:

I picked up a cheap indicator to check it out ,I think I'm gonna make a base for it that mounts to the side T slot . This arrow had a .015 though deflection from the spine to the weak side.

the difference in deflection? as in different spines if you rotated the arrow shaft to a different position?

[dbHunterNY]

On ‎8‎/‎19‎/‎2016 at 7:29 PM, Jeremy K said:

My next project is to get the chop saw so that it can be mounted to the T track and make the holders for the arrow to spin on while cutting to length. The T track will be the center of the work station and then I'll be able to swap out components depending if I'm checking spine or cutting to length.

only think I don't have is something to check spine and cut arrows.  I've got everything else.  I assume that chop saw is moving fast?  the biggest problem I've seen with homemade jobs is they don't have enough speed to make a clean enough cut.

[Jeremy K]

5 hours ago, dbHunterNY said:

only think I don't have is something to check spine and cut arrows.  I've got everything else.  I assume that chop saw is moving fast?  the biggest problem I've seen with homemade jobs is they don't have enough speed to make a clean enough cut.

10,600 RPM . It comes with a steel jewelers type blade which i wouldn't use ,i would use a 2 inch 1/16 abrasive wheel.