Grinding Shoulders

J

John L

Joined
Oct 28, 2004
Messages
1,330
I'm having a bit of a difficult time getting good looking grinds on shoulders. If flat grinding...should I round over steel platen edge a bit? If concave grinding should I round over wheel? Any tricks other than just practice practice practice?
 
The "standard" way is to run the belt off the edge of the platen or wheel a bit. For the 3/16" stock I use, about 1/8" off the edge seems to work about right. I start the process at 220 grit.
 
Are you talkning about the plunge shoulder? Dont have the belt overlap the platen untill 220? I need all the hints I can get ;)
 
Your knives look good enough to me dave ;) I'll try it out....
 
I found that it was not Nessa's to run the belt off the wheel to finish the shoulder on the last batch of hollow ground blades. I was using the new Gator belts and the grit was thick enough to finish he shoulder on the edge of the belt. Any one else find this to be true? Gib
 
Tracking the belt over the edge like the others have said, BUT, with the grinder running, I take a small piece of scrap steel and put it on the tracked off edge at an aprox.45 degree angle to round the edge over, or you'll end up with some nasty cuts in the shoulder area.

Don't do this with your coarse hogging belts, ie;40-60 Xweight types, but on your later J, or Jflex weight belts.
Just leave the shoulder a little short of the mark with the X weight belts, and round, and bring up to the line with the lighter ones.
 
Mike, thanks for the excellent tip. I have been wondering why I got those deep scratches and how to get rid of/avoid them in the future.

As for getting the shoulders even in the first place? I cheat. Once I have the blade profiled, I take a little round file and start a half moon choil area. Then, I simply put the edge of the belt in this half moon area. My grinds have been ending up surprisingly even. Not too bad for a blind white boy. (lame attempt at humor, using a line from the movie Road House)
 
heck...what I want to know is how you hold the scrap steel against the belt and grind at the same time?...or am I missing something?
Help a brutha' out....
 
blgoode said:
heck...what I want to know is how you hold the scrap steel against the belt and grind at the same time?...or am I missing something?
Help a brutha' out....
Click to expand...

That is a seperate step. You push the scrap piece into the corner of the belt for a few revolutions. You will see the belt round off a bit, and stay that way. It only takes a few seconds.

Then you grind your blade!!

Repeat on the other side, when you're ready to use it.


Dan, Y/W, hope it helps!
 
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