Ceramic glass for work rest on belt grinder and disk sander...

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Natlek

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Jun 9, 2015
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I just cut two piece ceramic glass for platen behind belt and start to sand edges......then I look in work rest on my grinders and I thought of all the flaws steel plate have ..... eureka :eek:
So , what do you think about this ?

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I have plenty of glass ;)

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Interesting! Is that the glass top off of an electric stove top?
 
A.McPherson said:
Interesting! Is that the glass top off of an electric stove top?
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Yes , I changed it last year and I kept it for platen behind belts but now I think that I found another place to use , my jig will glide on new work rest plate .. .no more rubbing steel on steel , especially nerves me when I grind to shape blade and that burr on edges ........:)
It is ceramic glass of course ....
 
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Well , I make another one plate just for ceramic glass .... :) Ceramic tile works excellent for now , what I should expect from ceramic glass ?
One more thing ............... I know that you use JB weld for this application, I use automotive polyurethane seal because it is so easy to clean up .But I have no idea of thermal conductivity of both .

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I think that I will do this modification this days .....NO glue , direct contact between glass and steel so heat from glass can faster go to plate .Red color is ceramic glass .

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First I use HSS steel for plate and I think that my belts last longer then .I have some kind of AL cooler behind HSS and it works .....
 
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Natlek, so the ceramic glass makes for a much smoother surface topping the tool rest? I run into jerky motions at times, which creates issues with the grind also. Rich
 
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rjedoaks said:
Natlek, so the ceramic glass makes for a much smoother surface topping the tool rest? I run into jerky motions at times, which creates issues with the grind also. Rich
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Well , that is what I think . I tried on this big piece of stove glass and seems that will work .
 
If you want to maximize thermal conductivity with your adhesive, see if you can get one of the "arctic alumina" products like are used to attach LEDs and CPUs to heat sinks. It's not super strong (so I would mechanically support as well) but it does conduct well. I've used it a lot for custom LEDs for reef tanks and it does conduct heat efficiently, although you still might want a cooling fan directed at your pseudo heat sink.

Alternatively, you could put a layer of "thermal grease" between the glass and steel, but that would require 4 point mechanical fixation.

https://www.amazon.com/ARCTIC-MX-4-...eywords=arctic+alumina+thermal+adhesive&psc=1
 
rjedoaks said:
so the ceramic glass makes for a much smoother surface topping the tool rest? I run into jerky motions at times, which creates issues with the grind also. Rich
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Rich, I put a piece on my grinder a year or so ago, and the main reason I was told why I should was that the glass prevents grooves from the belt forming on a plain metal platen and keep it smooth.
 
weo said:
Rich, I put a piece on my grinder a year or so ago, and the main reason I was told why I should was that the glass prevents grooves from the belt forming on a plain metal platen and keep it smooth.
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Your platen will DISH over time. The glass prevents that
 
rjedoaks said:
I was asking more about the tool rest, not so much the platen. A smoother tool rest so the jig glides without as much friction.
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Put a Teflon type material on your jig. Not on your tool rest
 
PTFE is Teflon. Exactly what you want to use.
 
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