Shop Tip

[Nabok]

It might make the ceramic more brittle, I wasn’t so worried about that as you said it was already cracked and it sounded like you weren’t worried about saving the liner. From what I remember freezing it made cleaning up the adhesive easier, most of it could be popped off with a screw driver leaving little or no sanding.

Todd

 

[C L Wilkins]

I just make another platen. It's not that hard to do. I have a Hardcore grinder and just use a piece of O1. Thread a couple of holes, glue the glass on with Shafting Epoxy from Golfsmith and I am done. JB Weld would work just as well.

I used to use 2 Ton Epoxy on my knives and it was OK. Surface prep is the key to any epoxy. I just decided that my knives needed what I thought was the best available. I don't much care for the grey color of the Shafting Epoxy. I use a colorant with it.

By the way, if you use Devcon 5-minute epoxy, it is not waterproof. In the summertime here in Texas, 2-Ton epoxy IS 5-minute epoxy!
...

One thing about JB Weld...I am a believer.

About 8 months ago, young son ran over a piece of concrete while driving the little Toyota pickup. It smashed the transmission pan and was it leaking like a sieve. Now folks, let me ask you something...have you ever tried to find a transmission pan at a junkyard that didn't come with a transmission? I ordered one from Toyota and it was a 2 week wait. In the meantime, I pulled the pan, cleaned it up real good and put JB Weld on it. I let it set up overnight. With a new gasket on the pan, I put it on the truck, filled the transmission with fluid and crossed my fingers. The new pan is still in the garage (I'll get to it when I can, no rush now) and that repair job hasn't leaked one bit.

As mentioned before, I believe in the stuff.

Craig

 

[MeDoctor]

It might make the ceramic more brittle, I wasn’t so worried about that as you said it was already cracked and it sounded like you weren’t worried about saving the liner. From what I remember freezing it made cleaning up the adhesive easier, most of it could be popped off with a screw driver leaving little or no sanding.

Todd

I guess I was being CHEAP. Unless I had plans for a 4" platen in the future, there's not much point in trying to salvage the cracked liner. The freezing tip is still appreciated. Thanks.

 

[ddavelarsen]

I use JB Weld, haven't had one pop off. When I needed to change it, I just ran a propane torch over the back of the platen until the pyroceramic fell off (onto a towel).

One thing that occurred to me - I just flipped the pyroceramic over and glued it back on with the first glued side out. I scraped off any remaining JB Weld with a razor blade. I still haven't replaced my original platen liner with the spare, and it's done about 60 flat ground blades and a bunch of tapered tangs. Good investment.