Remove scratches from saber ground convex?

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d.weglarz13

Joined
Jun 4, 2008
Messages
1,945
Hey guys. Please bare with me here. I posted this in the maint,tink,embell section, but figured I would ask the pros. I have a knife that has a saber grind but is also convex beveled, and the convex blends all the way up the blade to about 1/2" below the spine. two questions:
#1. What is the best way of removing scratches on the side of the blade?(i want to blend the bevel with the side of the blade, almost like a full flat, but I don't want to touch or scratch the 1/2" by the spine that makes this knife a saber grind. I love the pitting on it from when it was stripped of its coating, and would hate to rub it off at all.)
#2. If the saber grind is just a little bit off, as the 1/2" with the pitting runs a little longer on one side(just a little), is there a way that I can even it out a little, by bringing the primary grind a touch higher on the side that needs it to balance it out? (with the sandpaper, the same way as removing the scratches?) This is only for aesthetics, but it would mean a lot to me. The last owner of the knife made it convex with a wheel i guess, but i would just like to make it perfect.
Also, almost forgot, for now I would be doing this all by hand with sandpaper(hopefully!) as I don't have any grinders or buffers yet. I know this is rather detailed, and I sure hope I am explaining this all right, but any and all advice or ideas are more than appreciated. I feel confident in being able to do it myself if its possible, but if i have to send it out i will i guess. Thanks for your patience, and thanks for listening.
dave
 
Pictures might help. How does one do a convex saber grind? Do you possibly mean concave? A hollow grind?
 
Pictures would help. It sounds like the main grind is a saber grind but the edge was convexed? The only way to do what you want, is with a belt grinder. Since the blade is heat treated and tempered, doing it by hand will be time consuming.
Scott
 
Yes, that is exactly it. It is a saber grind, but someone convexed the bevel. I want to get rid of the scratches, but not hit the saber grind. Someone told me to do it with sandpaper, but now i hear i need a belt sander. Is it possible to do it by hand on mousepad at all? Thanks again. I will try to post pics.
 
Okay, its hard to see the scratches in the pics, but can i just lay the knife flat on a mousepad and sandpaper, and pull from spine to edge to get a nice satin look? I know how to work through the grits, but can i do this or would I have to use my hand (or block?) with sandpaper while the blade is in a vise? thanks for anything you can give me, and thanks for your patience.
 
If just the edge is convexed, then the sandpaper and mousepad should get rid of the scratches. Work up to a fine grit. Start with 100 grit and work up to 600 grit or higher. You can fine high grit wet/dry paper in the automotive section at Wal Mart or an automotive store.
Scott
 
I think if you use a mousepad you'll end up convexing more of the blade and the line at the transition to the flat will want to "creep" on you.

I think you'd be better off with a block of some kind (paint stick?) if I understand what you want- convex edge, satin "flat" sabre grind, untouched (pitted) blade flat, right? Is it a Busse?
 
Yes, it is a Busse SH satin jack. Yes, I don't really want the transition to creep up on me, and yes, I want to take out scratches above the bevel, but below the "saber ground" part. Does this mean I can't do it with sandpaper? I wouln't want to ruin the look of the knife with the lines and all, just wanted to sand out the scratches by hand if possible with either a hard surface or if you think something soft. Thanks
 
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