Polyurethane glues for high-impact tips
swest,
well, through all this abuse, multiple installs, multiple shapings, mulitple burnishings....luckily this has shown no signs at all of delaminating
stljohnny,
I can definitely see how a tip that hasn't been cut down to size would easily pop off. Hit just slightly off center will right away try to make whatever is hanging off the edge pivot over it.
I've yet to try a phenolic tip, I was giving this one a go first so I wouldn't have to worry about possible league or house restrictions against phenolic.
I agree though, when it worked, it worked very nicely
Fingers crossed that this last attempt will keep it working longer this time!
Kavik79:
I'll keep my fingers crossed for you, too. Good job.
One thing I want to share, though, is that cyanoacrylate glue is NOT shatter-proof. In fact, the material, when dry, breaks and cracks. It's very brittle.
Try this: put a couple drops of it on waxpaper to form a little pool, and allow it to dry that way, without disturbing the pooled shape. When it's finally dry, peel the resulting "button" off from the wax paper. Now bend that button between your fingers -- it should snap in half easily.
I had the same issue you did -- a Samsara flying off repeatedly, even though the breakshot was a pure centerball hit -- and what finally fixed the issue was to change the glue.
In my case, I used a polyurethane glue, like Gorilla Glue or the even better Elmer's product ("better" meaning it doesn't harden inside the bottle like Gorilla Glue does). What's cool about this glue, is that; 1.) you use plain water as the catalyst to start the cure process, and 2.) it expands as it cures, following and filling pores (CA glue, by contrast, shrinks as it cures). Yes, you'll need to apply constant downwards pressure to the tip as it cures (because the glue will "want" to push the tip away from the ferrule). And yes, it does bleed to the outside of the bond, forming a thick bead around the perimeter of the tip where it meets the phenolic, but it's easily shaved down flat.
The best thing is that polyurethane glue is flexible after it cures, and is extremely resilient to impacts. You can do the same waxpaper test with polyurethane glue, and the resulting dried pool forms a "button" that won't break when you flex it.
Caveats? The polyurethane glue needs at least 12 hours to fully cure.
However, the Samsara on my break cue has been abused since 2010 (I even lend it to people), and the tip has never come off since.
Hope this helps for the future.
-Sean