flat grind technique

M

Matlock

Joined
Jun 26, 2002
Messages
125
I'm getting half way flat grinds on my 2x42" sears belt grinder while holding the blade half way up the platen, kinda free floating there, but every once in a while it will catch and move all over on me and of course leave a ditch in the middle of my nice flat almost finished blade.:confused: Should I be grinding with the blade resting against the work table? Also I have heard of placing a glass surface on the platten makes for a smoother finish. How would you stick the glass on, and what kind of glass would you use? The platten on those sears grinders is just a pice of stamped sheet metal and it is getting large wear marks on it. Any help would be appriciated.

Matt
 
Matt,

I use glass liner on my platen and it does help keep everthing flat. I attach it with JB Weld. I don't use the work rest when flat grinding, I just tuck my elbows in tight to my sides and try to hold it steady as I make the pass for the grind. I think if you kep practicing freehand grinding in the end it will allow you some flexibility on your grinds.

Craig
 
I think most folks are using the glass from fireplace supply stores also some people use ceramic kiln shelving. You may be better off resting the blade on the work table .For flat grinding I have a 2 x 132" grinder that has a horizontal platen,so i have no work rest. I know where you are coming from on the blade grabbing, make me say funny words.

Mark
 
call these folks STEMMERICH 314-932-7726 they have a $40 min, tell then the size you want. this stuff will get grooves in it after a while so i just knock it off with a hammer and clean on the 4x36 before atching a new picece with super glue.
 
Pyroceram is the stuff you want. Places that sell wood stoves can get it, so can glass supply stores. It is not really glass, but a clear ceramic. As such, it does not really build up heat. It's neat stuff.
There's also a guy selling some in the CKD Classified forum. Go back a few weeks.
 
Matt,
I do all my blade grinding on a sears 2x42 with a 1hp motor also. I also do all my grinding in the area above the platen. I found that if you move it back a little, and then make sure your belt is nice and tight you can get a good flat grind. I actually only use half the belt width when grinding. You start at the ricasso and sweep it across the belt in a twisting motion. The less surface area you keep on the belt, the more control you have over the blade. You also might want to use a push stick to support the blade.
 
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