Carbon fiber shaft issue

selkov

Registered
A customer brought me a non branded carbon to took at as he hit a fan and thinks he split it. It makes an odd sound when stroked. I looked in thru the joint and see it is foamed. Has anyone any experience repairing these successfully and if so how please?
 
Why was he playing on the ceiling?
My experience has been many have a weight in the middle - usually nearer the butt than the tip. If the foam was not consistently applied, that weight comes loose and will slide around inside. The repair is to figure out which end it is loose end and some way to apply some glue or more foam.
Or maybe it's something else.
If it is split, that should be visible and the shaft is trash.
Gary
 
I thought carbon fiber was an indestructible miracle material.

It's likely cracked. It's just as likely garbage now. You don't want to see what happens when cf splinters.
 
If it is cracked flexing it gently will reveal the damage. Also look for a line running across the fibers where the shaft was impacted. If there is such a line that is a weakened spot and likely where the shaft will fail. (From my experience with graphite fishing rods.)

Try this test: Put the shaft's large end in your palm with the tip on the table. Apply enough pressure to the center shaft to slightly bend it. Now roll the shaft while maintaining the slight bend. If it is cracked it will tell you.
 
Thank you all for your replies, interesting thought about the weight. As I could not find an actual split that may be just it
 
A customer brought me a non branded carbon to took at as he hit a fan and thinks he split it. It makes an odd sound when stroked. I looked in thru the joint and see it is foamed. Has anyone any experience repairing these successfully and if so how please?
What part of the shaft hit the fan?
Tip end?
Maybe it broke the bond on the vault plate?
 
I thought carbon fiber was an indestructible miracle material.

It's likely cracked. It's just as likely garbage now. You don't want to see what happens when cf splinters.
cf is far from indestructible. sharp strikes along the sides of a shaft can easily crack. ever see a modern F1 car crash? depending on how the cf is made/oriented it can stay together or fail, sometimes spectacularly and on purpose to mitigate injury to the driver. sticking a cf cue in a fan is usually gonna turn out bad as in new shaft time. called it a 'stupid tax'.
 
A customer brought me a non branded carbon to took at as he hit a fan and thinks he split it. It makes an odd sound when stroked. I looked in thru the joint and see it is foamed. Has anyone any experience repairing these successfully and if so how please?
CF is not repairable. Time to get a new shaft
 
CF is not repairable. Time to get a new shaft
cf is far from indestructible. sharp strikes along the sides of a shaft can easily crack. ever see a modern F1 car crash? depending on how the cf is made/oriented it can stay together or fail, sometimes spectacularly and on purpose to mitigate injury to the driver. sticking a cf cue in a fan is usually gonna turn out bad as in new shaft time. called it a 'stupid tax'.
I also call it a ”dumb charge”.
 
Everything breaks, i've seen guys shoot with the shaft inverted and break the vault plate right out of the shaft nothing wrong with the shaft just abuse. It's now trash
 
Repaired one that had a micro split at the vault plate from a flat fall on a concrete floor. Bored out and cut off 1/2" and rebuilt, it was good to go. Took a bright light and magnifying glass to see it
 
Take a screwdriver and tap along the shaft, listen for odd/dead sound. Turn 1/4 turn repeat.
 
Repaired one that had a micro split at the vault plate from a flat fall on a concrete floor. Bored out and cut off 1/2" and rebuilt, it was good to go. Took a bright light and magnifying glass to see it
Depending on how much you cut off, you just changedthe geometry of that shaft. Maybe the player will get use it, maybe they won't i'm sure it will definitely shoot stiffer.
 
its actually the ferrule howver on those shafts it's insetrted in the hollow or foam filled shaft as the connecting device to the tip
 
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