Tuesday, March 15, 2016

Paying debts

This one is mostly for Jason.

Or for those people interested in getting the bang for they money regarding japanese/chinese diamond stones.

Or interested in saw geometry.

Or files.

All the pictures that come next are good things:

 a fast cutting saw for wet wood.

not well jointed but works ok. The steel is thick.

a sk-11 flattening diamond stone after a year of use, 12 students, and many many beers before taking it out of water.

It rusts, as you ca see, and those rust spot grow and peel off the diamond coating.

 it started quite soon back in Graz, if I used it for sharpening metal. As long as there are no metal particles on the thing, seems to work quite well.

 those spots will gouge your sharpening stones, but won't come off so don't worry too much. It's still usable but ordered a new one a week ago already. Only for stones and maybe can get some of that powder that makes water iron friendly... any idea what I'm talking about? saw it somewhere, it must be a base or an acid, will ask a scientist when I find one.


spanish files. They cut fast, get one if you find them in your local hardware shop. Erizo, porcupine in español.

That's another mini kannami in the making.


  1. Thanks Sebastian!

    Those teeth look like shorter versions of what was originally on the temagori nokogiri that I've been messing with. I guess you could call that the "all purpose" tooth design. I've got a couple that have a very tiny 3rd facet at the tip (like a regular crosscut tooth), but a couple others are only beveled at the leading edge, just the bare minimum. Cheap saws, go figure.

    The white powder that gets added to the waterstone pond water.....at a guess it's that VCI vapor corrosion inhibitor, the same stuff that's getting marketed to the woodworking community. It comes in sheets or little packets similar to desiccant. You put it in your toolbox and it purportedly keeps the contents rust free, but I've never tried it. They sell a powder form that gets added to fluid systems to reduce corrosion, might be the same stuff.

    Another trick might be to add a bit of automobile radiator antifreeze to the water. I've used a 50/50 mix (same as a car) to prevent metal parts from rusting during wet grinding operations. It's cheap, but I don't think I'd like the feel of it for waterstone use. I'll give it a try and get back to you.

  2. Hi Sebastian,

    Don't know if you figured this out already, but...
    According to Namikawa Heibei, who sells supplies for Japanese sword polishing (which I don't do... ) the additive is simple sodium carbonate - what's known here in DK as "soda". I haven't tried it in this application yet, but I do use it for scouring stainless steel countertops etc., removing tea stains from strainers etc., it cleans remarkably better than baking soda in this application.

    Anyhow, it's a simple and cheap, and I don't think there are any precautions with regards to safety.


    1. Cheers Henrik, I never thought about that. I guess that any base will do then. I need to add it to my water quite soon since the new diamond stone got already two rust spots. Will try it out and report back. In the meantime, a student bought an atona, the weight and size make it a better option for flattening I'd say. They are not cheap though.

      Thanks again!