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JC

JC

Coos Cues
Having never been satisfied with poly glue on my handles to hold the core to the handle wood I started using a jig to force west system epoxy into the void instead for a better bond and tighter clearance. I knew I was getting good penetration on the core wood but yesterday I understood exactly how good.

I built a cue with poor planning and it was about an ounce heavier than I wanted so I decided to lighten it up in the handle. My handle core is .800" so I decided to gun drill out the purple heart core at .631" up 15 inches from the butt and recore the core with myrtle wood which is 20 lbs per square foot lighter than the PH. Math told me I will lighten the cue by .9 oz by doing this.

So I drilled a pilot hole with a 5/8 carbide bit about 4 inches in and then went to work with my gun drill. I drilled a little bit without the air on to see how warm the bit would get thinking I could make short work out of it without a big mess. After about 2 inches I pulled it out and it was very warm. And it was sticky as hell, covered with melted epoxy that had penetrated that .800" core down at least as deep as I was drilling at .631"

I was pleased to see this.
 
I drilled a little bit without the air on to see how warm the bit would get thinking I could make short work out of it without a big mess.
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Do a search on dust collection while gun drilling. You have about 95% less of a mess while being able to blow full air pressure thru the tip.
Easy set-up if done correctly :)

Ditto on the poly glue not being the best ;)
 
JC said:
Yes but I already suspected that based on some other mock ups.
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Did you do a thin mix then follow with ketchup mix ?
If it penetrates that much, I'd be concerned about developing a gap after the epoxy settles .
 
BarenbruggeCues said:
Do a search on dust collection while gun drilling. You have about 95% less of a mess while being able to blow full air pressure thru the tip.
Easy set-up if done correctly :)

Ditto on the poly glue not being the best ;)
Click to expand...
I have a 100% mess free collection box I use to gun drill that takes a few minutes to set up. Since I was going to go just a couple inches deep to calculate the density of the core I was replacing I figured I could accomplish that without too much heat or evacuating the chips all over the shop as PH is generally pretty crumbly chip wise. It wasn't crumbly though because it was epoxy impregnated. Which was my pleasant surprise.
 
JoeyInCali said:
Did you do a thin mix then follow with ketchup mix ?
If it penetrates that much, I'd be concerned about developing a gap after the epoxy settles .
Click to expand...
Take a look at this video and see how the glue is coming back out of the core toward the glue joint several minutes after installing it under pressure @ 1:56.

It's the butt sleeve portion you see there but the same thing is happening up in the handle. It's refilling any potential voids from being forced into the core wood and then squirting back out when the pressure is released. I am doing this with about .003 clearance in the handle and glue relief.
 
PH is generally pretty crumbly chip wise. It wasn't crumbly though because it was epoxy impregnated. Which was my pleasant surprise.
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This is interesting.
I've used WEST, often more than a C unit (5 gals) per year, since about 1980 for all sorts of millwork, especially bent laminations..
Some 15 years ago when making metal bodied woodworking planes, i attempted to impregnate purple heart for the totes ("Handles") with WEST in a vacuum chamber. I could not get any penetration much deeper than what occurred merely from slathering it on, and waiting for an hour before wiping down. (very little)

I have seen significant penetration in some soft woods. Used to bend a lot of redwood and cedar. Never got much depth into side grain in solid hardwoods unless there were defects in the material.

OTOH, Hydraulic pressure is an amazing effect.

smt
 
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