What is the best way (if even possible) to separate a broadhead from an adapter that was glued with epoxy?

If it can't be done, now worries but if it can then I'd like to repurpose some heads.

I have heard heat will break down epoxy. You could try putting them in boiling water to see if it works. I have no idea if it will work but might be worth a try.

I use a propane torch and it takes a lot of heat to break down epoxy.

I've done a few 2 pair of pliers and a propane torch if not going to keep adapter. If going to keep adapter heat up then screw into arrow when bottoms out use pliers to break loose by continue to tighten, then use pliers to get adapter back out. I use epoxy on most all heads I've shot in past heat has always broke loose for me.

Will a torch ruin the broadhead temper? Or is that only if it gets red hot?

Most epoxy will release with heat before you ruin the temper........unless you used JB weld, then you're hooped. Use a propane torch and keep the heat concentrated on the ferrule as much as possible.
Darcy    

Melting epoxy is like melting plastic, messy and lots of noxious smoke. Do it outside in the driveway and have gloves on. You will not harm the threads with the torch if you just give it enough heat to melt the epoxy and not hold the torch on the threads a long time. Heat it then wipe away the melt with a rag then heat a little more til you get it all off. Also work with ramrod ends.

I fiind that most epoxies will soften and release around 300/ 400 degrees F. This will not affect the temper in steel.

Heat it only enough to do the job of releasing    

I have used a propane torch before, but be WARNED, when the bond finally breaks, the end NOT being held by pliers will shoot out like a bullet.  I have the hole in the wall to prove it.  Protective eyewear and clothing are a MUST when doing this.

QuoteOriginally posted by Mike Vines:
I have used a propane torch before, but be WARNED, when the bond finally breaks, the end NOT being held by pliers will shoot out like a bullet.  I have the hole in the wall to prove it.  Protective eyewear and clothing are a MUST when doing this.