srjknives
01-04-2001, 11:01 AM
I promised to report on how I polish a blade:
After seeing it done many different ways, from using 220x, then 500x, then a worn out 500x with grease applied, then buffing with coarse and then fine buffing compound; or from a 220x to a waterless glue-based compound, then buffing with coarse and then fine compound and various other techniques, I came upon this method. It works for me, may or may not work for you.
After finish grinding with a 50x, or 60x belt after heat treat, (LOOK SERIOUSLY INTO USING CUBITRON BELTS, THEY ARE WELL WORTH THE EXTRA COST!) we go to a new 400x Aluminum Oxide belt, preferably in "J" weight, as "J-flex" is too flexible and "X"-weight is too stiff, in my opinion. This new 400x belt will wipe out 60x or 50x scratches very easily and very quickly. The finish left form a brand new 400x is still a little bit too rough for the next step, so after I do 2-4 blades with the new belt, depending upon the size of the blades, I then go over the first one or two with the more worn 400x belt that I started with.
The new green Trizact belts with the "tire tread" design on the face of the belt do a great job. I use the 350-400x belt in place of the 400x ALOX now. (I've been told that the A45 belt is 350x by one supplier and that it is 400x by another, either way, it's working pretty well so far).
Next, thanks to advice form Mr. Yancy, over in Colorado many years ago, about 1978-79, perhaps, we take a 400 x CORK BELT that has been "broken in," and go over the 400x finish left by the previous belt, until all those scratches are gone. Use a fair amount of RCH's Green Chrome buffing compound on these cork belts. You can push pretty hard.
After a thorough going over with the 400x cork, I go to a 600x or 800x Cork belt, also broken in and also using Green Chrome. It's hard to see the scratches, but a few minutes on this belt will clean up all the previous 400x cork scratches.
Then the final buffing, with the Green Chrome on the buffer, polishes the blade in less than 1-2 minute's time.
To break in the cork belts, put them on the grinder with a tool rest in place. Using a scrap piece of blade steel, or whatever, wear on that belt for a good 10 minutes. Be careful not to "break" the corners, or edges, of the belt too aggressively, or all the cork and polishing media will peel off. Buffing compound helps here, I think, in making it easier to "fold" around the edge of the wheel a little. You do need to slightly break or round the corners of the belt around the edge of the wheel, however, but be careful not to overdo it. It is smelly and dirty for that 10 min, but it takes that long (10 min. by the clock) to break the belt in.
A new cork belt looks like a 36 grit AlOX belt, it's so rough. When it's broken in, it has some smooth spots, some valleys and starts taking on a smoother, slightly shiny appearance. Use the buffing compound during the "break-in." Be advised tht it takes some pressure, and time to do the job. You don't want to peel off cork, you are trying to just smmooth out the surface of the belt somewhat.
These belts will then last you 2-3 years, assuming that you do 50-100 knives per year. Take a little care with the edges, as I've noted above. Use ample compound. Hopefully, you might be as happy with this process as I am. The cork belt is the best thing to come along in many a year, as far as I'm concerned.
Some use the new Trizact belts and love them. I haven't warmed up to them yet. Are there any users out there who can train us on how to use them correctly? Someone told me to use very light pressure while polishing/grinding with them... Maybe this could be new post/thread on this forum?
Let me know if you have any questions or comments.
After seeing it done many different ways, from using 220x, then 500x, then a worn out 500x with grease applied, then buffing with coarse and then fine buffing compound; or from a 220x to a waterless glue-based compound, then buffing with coarse and then fine compound and various other techniques, I came upon this method. It works for me, may or may not work for you.
After finish grinding with a 50x, or 60x belt after heat treat, (LOOK SERIOUSLY INTO USING CUBITRON BELTS, THEY ARE WELL WORTH THE EXTRA COST!) we go to a new 400x Aluminum Oxide belt, preferably in "J" weight, as "J-flex" is too flexible and "X"-weight is too stiff, in my opinion. This new 400x belt will wipe out 60x or 50x scratches very easily and very quickly. The finish left form a brand new 400x is still a little bit too rough for the next step, so after I do 2-4 blades with the new belt, depending upon the size of the blades, I then go over the first one or two with the more worn 400x belt that I started with.
The new green Trizact belts with the "tire tread" design on the face of the belt do a great job. I use the 350-400x belt in place of the 400x ALOX now. (I've been told that the A45 belt is 350x by one supplier and that it is 400x by another, either way, it's working pretty well so far).
Next, thanks to advice form Mr. Yancy, over in Colorado many years ago, about 1978-79, perhaps, we take a 400 x CORK BELT that has been "broken in," and go over the 400x finish left by the previous belt, until all those scratches are gone. Use a fair amount of RCH's Green Chrome buffing compound on these cork belts. You can push pretty hard.
After a thorough going over with the 400x cork, I go to a 600x or 800x Cork belt, also broken in and also using Green Chrome. It's hard to see the scratches, but a few minutes on this belt will clean up all the previous 400x cork scratches.
Then the final buffing, with the Green Chrome on the buffer, polishes the blade in less than 1-2 minute's time.
To break in the cork belts, put them on the grinder with a tool rest in place. Using a scrap piece of blade steel, or whatever, wear on that belt for a good 10 minutes. Be careful not to "break" the corners, or edges, of the belt too aggressively, or all the cork and polishing media will peel off. Buffing compound helps here, I think, in making it easier to "fold" around the edge of the wheel a little. You do need to slightly break or round the corners of the belt around the edge of the wheel, however, but be careful not to overdo it. It is smelly and dirty for that 10 min, but it takes that long (10 min. by the clock) to break the belt in.
A new cork belt looks like a 36 grit AlOX belt, it's so rough. When it's broken in, it has some smooth spots, some valleys and starts taking on a smoother, slightly shiny appearance. Use the buffing compound during the "break-in." Be advised tht it takes some pressure, and time to do the job. You don't want to peel off cork, you are trying to just smmooth out the surface of the belt somewhat.
These belts will then last you 2-3 years, assuming that you do 50-100 knives per year. Take a little care with the edges, as I've noted above. Use ample compound. Hopefully, you might be as happy with this process as I am. The cork belt is the best thing to come along in many a year, as far as I'm concerned.
Some use the new Trizact belts and love them. I haven't warmed up to them yet. Are there any users out there who can train us on how to use them correctly? Someone told me to use very light pressure while polishing/grinding with them... Maybe this could be new post/thread on this forum?
Let me know if you have any questions or comments.