Mon Mar 03, 2014 12:36 pm
I have a set of naniwa stones - 400, 1000, 3000, 6000. I don't use the 400 much, but I do use the other 3 in a standard progression for most of my sharpening needs.
For some reason, the 3000 gets gouged, while I don't currently have a problem with the other 3. I sharpen like shown in CKTG videos - blade edge facing away perpendicularly, going forward and back with equal pressure a certain number of strokes, then moving down the blade edge and doing the same until I reach the tip. The gouging comes at the start/middle of my push stroke. I have been checking my blade angle to make sure that I am not lifting up on the spine, making a more obtuse angle. Can't say that I do. I also thought I may be pressing down too hard on the blade, so I grabbed a kitchen scale and it looks like I am somewhere around 4-5 lbs of pressure, which doesn't sound like too much from what I have read.
Any other thoughts? I clean up the stone after the gouges with a 120 diamond plate, but it still happens frequently. I did have a little bit of the same problem with the 6000 when I first got them, but don't have the issue any more.
For the time being, I have been using the 3000 on pull strokes only, or just not using it at all, and jumping from the 1000 (or 2000 green block I also have) to the 6000. But I'd like to be able to figure this out.
Thanks for any insight.
Mon Mar 03, 2014 12:44 pm
It's a soft stone so gouging can be a issue. Edge trailing strokes will help for now.
Over time you will get better at not gouging the stone but sometimes it just happens.
Mon Mar 03, 2014 1:34 pm
Jason summed it up pretty good. Gouging happens to the best of us with soft stones. However this could be a sign you are placing too much pressure.
Mon Mar 03, 2014 2:17 pm
Thanks gents. will focus on edge trailing only and lightening up.