blade sharpening

U

UDI

Joined
Jul 13, 2004
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5
I am interested in getting into professional blade sharpening, mainly for kitchen and chef knives.

I tried honing blades ,and got brown marks on the blade edge, which means the blade is overheating.

I am trying to tell my local supplier that I need a different honing disk, but have trouble working out what I need.

The disk will be installed on a rotary 8" grinder running at 2800 rpm.

Is there a international code for the disk I need.? Does anyone have any suggestions?
 
I am far from an expert, but I think if your blades are overheating you are trying to remove to much metal to fast.
 
2800RPM is way too fast for a sharpening setup. Get something with variable speed.
I'm certain there's been about 50,000 posts on that subject here, so info shouldn't be hard to find.

You can also get a geared, stone wheel sharpening setup, if you don't want to go to the expense of a VS belt grinder.
 
The simplest solution is a 1x42 belt system. I imagine they can be bought for pennies at harbor freight, like this, though I prefer 1x42. http://www.harborfreight.com/cpi/ctaf/Displayitem.taf?itemnumber=2485

Then get some real sharpening belts like these:

http://www.leevalley.com/wood/page.asp?SID=&ccurrency=2&page=48040&category=1,43072

Something like a 220, and then something much finer.


This is the expensive version of what you are doing:

http://www.leevalley.com/wood/page.asp?SID=&ccurrency=2&page=48435&category=1,43072


You don't want to overheat blades, though brown probably won't draw the temper of most kitchen blades, blue is bad though. Overheating the edge causes these colours. Sandpaper is less likely to burn than most stones, as long as the paper is clean, you should be able to cut both fast and cool.
 
I agree with the above reply's.
I did commercial blade sharpening for 15 years and used a 1''x42'' belt sander slack belt, 220 grit and 400 grit and finished them off on a 1700 rpm buffer with a leather wheel coated with white compound, a hard felt wleel works also. I would not want to sharpen knives on a hard stone wheel.

All the best, Don Hanson
sunfishforge.com
 
I made a wooden wheel a while back if you want to search for it. I used white buffing compound on it and it works great.
2800 is too fast.
 
I'd get one of those big 4' diameter wheels with bicycle cranks on it and go to town! You could get rid of your gym membership, too. :D Good luck with the business endeavor...
 
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