New grinder plate poorly sharpened.

[gearloose]

I just received a new 3/4" (20mm) grinder plate from TSM.  The thing looked like it was sharpened by holding it up to a belt sander & spinning it.

  I held it up against a machinist square and it had a definite dish shape in the cutting face.  Well, after almost an hour working it with wet & dry 150 gr sandpaper on a granite plate, then another half hour honing it on a diamond stone and polishing it on a Japanese water stone, I have it flat and smooth all around the cutting holes.  It's still rough and a little low around the center hole, but I think that is in the area the blade will not touch anyway.

My question:  Is this typical, or did I get one that missed a step in the mfg. process?

 

[chilerelleno]

I would've sent the dagblasted piece of crud back to them with a rude note attached.

 

[gearloose]

I went to the website to leave a review and happened to notice that the grinding marks I mentioned are visible in the product photo, so that answers my question about whether or not mine is typical.

The grinder marks visible on the hub side of the plate in this photo are identical to those on the cutting face.

Grinding plate.jpg

• gearloose
• Jun 22, 2017

 

[daveomak]

Was the surface that contacts the knife the one that was screwed up ??   It's hard to get good help these days...  

At least you noticed it and didn't get frustrated with your first grind using your new grinding plate....  Things are looking up.....

 

[gearloose]

 
Was the surface that contacts the knife the one that was screwed up ??   It's hard to get good help these days...  

At least you noticed it and didn't get frustrated with your first grind using your new grinding plate....  Things are looking up.....

Yes, it's the knife side that was rough and slightly concave.  I haven't used the plate yet, and may work on it some more to get all of the grinding marks polished out and get it completely flat.  I looked at photos of the other size TSM #10/12 plates w/hub and they all show those grinder marks.  On the plus side, the plate is a perfect fit in my Chinese-made no brand 3/4 hp grinder I bought from Northern Tool in 1994.  I was very concerned about that, as this is the first accessory plate I've bought for the grinder.  That grinder has been sitting unused in a cabinet in my garage for over 10 years.  Now that I have my cold smoking modifications made to my BBQ rig, I'll be getting a lot of use out of that grinder and plan on buying a couple of more plates & knives to round out the size assortment.

 

[daveomak]

I bought a 1/2" and a 3/4" plate and extra knife not long ago for my #12 Kitchener....   Chili and Taco's coming up.... 

GRINDER PLATES 3-4 1-2.JPG

• daveomak
• Jun 22, 2017