Simple Problem

[Hollon]

This is really a beginners question, but here it is. I was wondering what the best way to put an angle on a blade, since most of mine (I've only made four knives) seems to just kind of curve down to the edge rather than straight angles. Part of the problem is probably the grinder I'm using which some 50 year old homemade one, that I'm using a plow sharpening wheel I believe.

[Rich Hale]

I am not quite sure what you are asking..maybe a drawing would help?

[easilyconfused]

If I was to wager a guess, you're meaning a convex grind? Like this? (). If you're using a round grinding stone, it's a common problem, although it is a good grind for heavy chopping, and I don't have an answer other than practice and experiment with your stone. Possibly grind along the wheel instead of perpendicular to it to maximize the width of contact. Make sure the tip is pointing towards the rotation though so it doesn't grab and turn the knife into a projectile as that can be very very painful . You might also be able to use it for rough grinding and then switch to files and hand stones/sandpaper and hand work it for a flat grind.

[Rravan]

In my opinion an angle grinder works the best fot a flat grind and can be brought for arount $60.00 AUS, at bunnings.

[MooseRidge]

One of the problems in using grinders for edges it keeping the angle constant. Usually results in a wavy bevel along the edge. The best thing is to use the grinders to get the blade close, then use a knive-sharpener vise and hones to get the blade set correctly.... a little pricey to buy, but you can make one.... just look at pictures of ones on-line, then make your own....

[steve sells]

Funny how every one is missing the simplest and cheapest way to get a flat edge.

Files have been used for centuries, they didn't have Bader B-3 back then, and I didn't have one till a month ago. Even so I still love my files. I can file things and shapes I would never try to get with a power tool

[MooseRidge]

Use them all the time, but still not expert in filing the blade edges.... guess I need more practice.... LOL!

[ThomasPowers]

look into "draw filing" best way to file a blade in my opinion.

[Hollon]

Yes, it was a convex grind that I meant. But the general consensus is use a grinder to rough it out, then use files? I also getting a new grinder that uses a completely circular shaped grinding wheel soon, so that may work better. Also, would a belt sand work in place of files, since thats what I use to get rid of grinding marks anyway?

[jimmy seale]

I yse a belt sander-4 X 36" 100$ from Lowes. and it has a 6" disc that i thought would be worthless, but, I was wrong- all i need now is to find finer grits-but i started out with a 3 x 18 b&d that i put in a vise that worked for awhile- hope this helps