Hard hones take a considerable amount of time and effort to lap. Essentially I am not cutting hones for the same reason. I do intend to build an electric lapping table, which should take some effort out of it.
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Hard hones take a considerable amount of time and effort to lap. Essentially I am not cutting hones for the same reason. I do intend to build an electric lapping table, which should take some effort out of it.
I found yhis great piece of Jasper at a gun show>>? After hours of lapping over time both faces of it have become a final polishing stone. Or, as often, a base for use of a different stone as a Nagura.
Attachment 299294
JMO
~Richard
Nice! Looks like an old-school black board.
I'm curious why a belt sander is not good enough for the job
On soft rock a wet belt sander is ideal. A belt sander woks and so does flap discs on grinders. On the harder rock however it is hand lapping on diamonds or SiC grit.
Absolutely. I can tell that he has never tried to lap a hard stone, lol. Trying to lap something like the piece of jasper above on a belt sander would be like an exercise in futility. You might make a little progress if you could slow down the belt to a crawl. A stone that hard almost feels like ice skating on an abrasive belt. Even a diamond plate is VERY slow to lap such a stone - doubly so if there's much surface area.
BTW awesome piece Richard!
I'm thinking of trying a diamond cup wheel to knock off the high spots on one of the quartzites.