made my first shaft, need advice for second

O

owll

AzB Silver Member
Silver Member
made a shaft for my schon with delrin for collar and juma ferrule, moori med tip.....

I wanted a softer hit than my schon shafts, and boy i got it......its too soft.

I would like to get a little harder hit, but not as hard as schon's normal shafts.

Does that delrin collar at joint soften the hit up alot, or is mostly the juma?

Any ideas to get a slightly harder hit are greatly appreciated :)

(already planning trial and error, just hoping for help on lowering the error, heee)
 
My thoughts are related to Delrin as a joint collar.

No glue known to man will hold it,unless there is something I've never heard of.

It's too soft to begin with.

I'd use the double black phenolic next time,but experiment with the tip/ferrule to get the softer hit.

I'm not trying to belittle you in the slightest,but Delrin for joint collars is a bad idea. Tommy D.
 
i just checked my order history, and what i thought was delrin is actually abs, not sure what the difference is...but from the comments above, i hope it glues better lol
 
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Delrin was used as collar by Spain.
If you thread it right, it will stay.
It's been used as insert even.
Glue bond is not the only viable bond there is .
 
JoeyInCali said:
Delrin was used as collar by Spain.
If you thread it right, it will stay.
It's been used as insert even.
Glue bond is not the only viable bond there is .
Click to expand...

I believe Nubbs used it successfully also, as a collar/insert... ABS is way softer
 
You have made a shaft that is soft, and softer. I personally like the soft hit of a juma ferrule, but would change the delrin collar out to black phenolic and see if that is more to your taste on hit. IMO a moori med also has a softish hit, so if the delrin to phenolic change is still too soft, also change the tip to something harder. 'Course just changing the tip is the easiest thing to do.

Alan
 
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hey alan, ill think ill try that on second shaft (want to keep first as is, for a future reference point)....but im definitely going with what you suggested on second one....thank you.

don
 
I have couple earlier Hueblers, one has delrin collars and it seems very solid. I think the "secret" is that delrin is hollowed very slightly to form a very shallow bowls which oppose each other as you tighten the joint. I don't know if this was intentional, or a happy accident of the wood shrinking more than the plastic. The "give" of the nylon insert provides the tension.

As for delrin, when I was in college, one summer I worked in the chemistry department for a researcher who was fabricating test equipment. We routinely glued delrin. It requires a chemical etching process using chromic acid. You can make a "lifetime supply" for ~$30, it keeps forever. It actually chemically alters the ends of the polymer chains on the surface making them easy to crosslink with both epoxy and acrylate glues.

It does haze / etch the plastic. So if making a collar, you would likely etch the whole part - to treat the ID, and then mill off the haze on the OD. Personally, I like the "sanded" look of the etched plastic.

But if you want to bond delrin to anything, that's how.

-- Bob
 
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