Can't find and old cresting machine build thread??

[monterey]

Not long ago a member posted his home built cresting tool.  The builder had solved the arrow wobble problem with some sort of nut obtained at a harley dealership.  :confused:  

So, I've built a cresting tool and am trying to solve the wobble problem.  Can anyone direct me to the thread I refered to above??

Have tried the search function and it did not turn it up.

All help greatly appreciated.

[mike g]

What about the How too section

[Charlie Lamb]

good luck. I heard the thread originator was electrocuted in an arrow painting mishap.
   :cool:

[monterey]

No answer in the  "how to", but loaded with many other great ideas.

I did find the thread.  Kinda embarrassing, but remembered that I had posted in the thread and found it by searching my own posts!

answer was the OP used a well nut.

once this tool is up and running I'll post some pics.

[D]

Yea I would like to see some pics of how that works

[REALmacoy]

Ok, I hope you can afford it, an 1 1/2" of rubber tubing! something flexible, surgical tubing. easy. the tubing connects the shaft to the motor, a few v blocks, your ready to crest away. even if the shaft doesn't line up with the motor, no problem. but don't use a 2000 rpm motor :-)

[monterey]

I initially tried the tube but but got quite a bit of wobble.  Was able to crest a set of a grandson's older arrows but it was kinda tricky.  Will try to locate a well nut and see how that works.

[REALmacoy]

was your tube soft/flexible? I've used home-mades with the yellow surgical tubing for years, no problem. Are you using felt covered v blocks and how far down the shaft is the first block?

[monterey]

It was flexible.  Could have been a bit too small in diameter.  I have three V blocks covered with a thick soft canvas.  One possible problem could have been that the arrows were fletched?

[Roadkill]

Well nut?  What is that?

[Slickhead]

rubber tubing for a slingshot
Make sure its just long enough to hold the shaft in place.

[M60gunner]

If the shaft is long enough on your motor you can use the attachment for the Bohning crestors. That is what I did. I used a motor from an old copy machine. It was geared about the same as a BBQ spit motor.
This works well for alum. and carbon shafts, they are straight. Wood was another story, any bend in shaft and you get wobble.

[LittleBen]

One thing you could try in order to reduce or eliminate wobble could be to use one V-block near the nock, and one near the point, with felt in the v block, then use a flat piece of felt covered material over the top of the shaft at each v-block.

That way both ends of the shaft are held firmly in the "V" of the V-blocks.

May take some trial and error and shimming to get a good fit but that would be my plan .... will be very cheap to try.

[monterey]

Reduced the wobble a lot by shortening the rubber tube.  Think it also needs to be a bit larger in diameter.  Also found it beneficial to use slight finger pressure on the shaft with the V block set as close to the work area as possible.

Need to get some pics up with this and will as soon as practical.