On Tuesday, 12 February 2019 06:25:52 UTC, wrote:
Hello all.

I'm after a diamond grit sharpening stone. I intend to use it for general purpose sharpening, as well as flattening my Jap water stones.

I notice that "DMT DiaSharp" seems to be a premium product in diamond grit sharpening stones (judging by the price, at least). On the other hand, there are a lot of cheapo items on eBay that are less than half the price of a DMT of equivalent size.

My working assumption is that the DMT products will be better made (flatter, more durable, more uniform grit etc.), but does anyone have anything positive to say about cheap diamond grit sharpening stones? Source?

Thanks.

Bill.

There are less diamonds in cheapo stones and they are slower cutting/less effective.
I suspect the diamonds may also be smaller in the cheaper ones.

You notice this when cutting very hard things, eg granite.