Sharpening BM940 Osborne - Help?

cziv

cziv

Joined
Nov 24, 2005
Messages
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Hi Guys,

I have a BM 940, the new one around with the green handle and S30V blade.

I want to sharpen it on my new Spyderco Sharpmaker.

I can see that one side of the blade has a longer ground edge than the other. My plan was to use the Sharpmaker at 30 degrees with the coarse rods, until both sides are as even as possible and finish with the included fine rods.

Afterward, I thought about moving to the 40 degree setting and using the rods again to put a micro-bevel on it.

Questions I have are:

Do I need to buy the diamond rods to accomplish this properly? Do I also need the ultrafine rods?

I would like it to be very sharp but it doesn't have to be the sharpest knife in the world if you know what I mean. If it will slice printer paper into consecutively finer slivers then that's PLENTY sharp for me.

Thanks to anyone who'll help out!

BTW, I don't like the Guided Smith, Lansky types, I like the V-Rod type of systems like the Sharpmaker - and I'm not good enough to sharpen free hand yet either.
 
In a way spyderco sharpnmaker is a freehand too. I gave it to 2 different people as a present and both had problems holding the blade consistently vertically. No prev. practice in sharpening. So, it's not that easy.
Also, default set brown/'white rods are clearly inadequate for serious sharpening. Yourosborne is probably close to 40 total, so you shouldn't have too many problems, but if you ever want to thin down the edge then you will need diamond rods.
 
Thanks Gator97,

I looked carefully last night after posting. Holding the knife, blade up, under a lamp, one side exposed it's edge by turning to about 45 degrees. The other side didn't expose it's edge until it was turned 90 degrees (or "flat" parallel to the floor).

I've hand sharpened over the years but I always end up getting a scratch or two on the finish. ($25 knives) I can hold perfectly on a pull through for some reason - like my Edgemaker Pro which does a really super job on our kitchen knives.

Is it "easy does it" on the Spyderco diamond rods?

Yikes! They're expensive after adding the cost of the kit too.
 
I found that every knife took a long time to sharpen the first time on it. VG-10 is the hardest stuff I've been sharpening, but just stick with the brown stones a while. It'll get there eventually.

Even if the angle is close it's usually not exactly the same. Once the edge matches the rods, every time you sharpen afterward will be much easier (unless you don't sharpen for a long time or mess up your edge badly).

I do 50-100 strokes on each stage with a knife I've never sharpened and that has so far gotten all of them to shaving sharp.

That sounds like a lot but it's only a few minutes and only once.
 
If you get it to 30, 40 should come fairly quickly with the brown rods. Light pressure alternate every stroke.
 
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