Thread: I Found It Over There

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.

JMO
~Richard

Originally Posted by RezDog

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've had thoughts down that line also, and a saw bigger than 10 inches would be nice too.

Originally Posted by Geezer

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.

JMO
~Richard

My first finisher was an Owhyhee Jasper, roughly 2 x 4 inches. You've got some good size on that one.

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.

Originally Posted by RezDog

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.

Originally Posted by Geezer

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.

JMO
~Richard

If it’s not too much trouble, can you post a photo of the rock illuminated from behind? I’m trying to imagine how spectacular that might look.