Glass platen

Walt2

Walt2

Well-Known Member
I started using a glass platen a short time ago and was surprised to see that grooves are already started to form where pressure is put against the platen. I am wondering if this is common or not. Also wondering if this black crud from the Blaze belts has something to do with it. I am talking about only completing 5 blades. Any opinions?
 
Check around locally.....for a lot of years I didn't know it, but I have two glass shops/stores right here in town that carry it....one store calls it "fireplace glass", and the other calls it "ceramic glass"......I've purchased a couple of piece from each outfit, and now when I need a new platen liner, I grab the phone, give them the size, and usually pick it up that same day. It's still pricey, but I get it quickly, and don't have to pay shipping.

I'm starting to learn that you can often find a lot of what's needed, simply by taking the time to explain the attributes of the product.....very often what we in the knife world label an item, is know by another name to the rest of the world! :)
 
Ceramic and pyro ceran platens far out wear metal platens that have been left at a high Rockwell hardness, but yes they do still wear. When they do thin grinding belts will give odd grinding and strange grinding problems first. These belts will enter the holes, slow done a smidgen, bunch up and create weird things in the way of grinding very oddly. Just use a flat edge and some light to find if there are areas of wear. I havre even turned the glass over and used the other side. Use some heat, a putty knife and some gloves to remove the glass. Frank
 
Just do what I do, start out with your toolrest at the bottom of the flat platten and as you get a groove move it up until you get to flat glass again and start grinding.
CW
 
Walt2,
Are you using a CERAMIC glass (pyroceram, pyrex, fireplace glass, etc...) platen, or just regular glass? A ceramic glass platen should NOT wear after only 5 knives. As far as the black crud, that can easily be removed with a razor blade scraper.
 
I am using ceramic glass platen. It is not wore out, I just noticed that I am beginning to see some scratches on the platen where pressure is applied. I have been using a razor blade to get rid of the black stuff. I was just surprised to see scratches after only 5 blades.
 
What are you guys using to adhere the ceramic glass to the platen?
I have a piece that I need to take to my buddies glass shop to get cut to length and top edge radius ground
for less belt wear and friction. I was thinking of using JB Weld. Yes? No?

Also, when it does come time to remove the glass, how do you do it?

Thanks
 
hi,
everyone has talked about "ceramic glass" for the platen. will plain jane glazed tile work as well? i use a 4" x 36" and was thinking of using a 4" square glazed tile like you would use for bathroom floor or wall. would solid granite be an option?
thanx

scott
 
If you attach the ceramic platen with JB Weld; when one side wears out, put it in the oven at 500 degrees for 1/2 an hour and it will release. Use a razor blade to peal the old JB Weld from the surfaces and re-apply.
Five blades seems a little fast to wear out; mine go about a year before I have to flip them.

Fred
 
Another thing is do not profile against the glass,it will make it wear quickly,first profile againt a contact wheel then just flatten it with the glass.
Stan
 
"Plain" glass is softer and wears quicker and will crack from the heat. Fireplace glass (trade names include pyroceram, pyraceram and others) are harder and handle the heat better.
 
Stan, I profile all the time . It does show wear after a time but I find it works for me. I take a torch and heat it and bwith the aid of a putty knife and gloves off it comes. I turn mine over and use them for the second time. I have an old cork 100 grit belt I use to clean up the edges and radius the top and bottom. Frank
 
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