Thread: Help with lapping of very large hone

Hi anyone has exprienced lapping of large hone (8x17"). I was given an old hone by my aunt who had it from her father who was involved in national stone mining business. It looks slate ish however I could be surprised due to background of the original owner. I do not want to just experiment with this hone. I do have stone plate large enough to accommodate sanding belts from floor sander however they do not come in higher grits. Anybody can chip in. Many thanks.

How much lapping does it need? I've no experience with lapping huge stones, but I can tell you that the bulk of your work needn't involve higher grits. Once you get it flat enough with the lower grits, I'd probably just set the hone on a counter and polish the top with sheets of wet/dry sandpaper taped to your stone plate.

Take it to a place that does marble & granite counter tops. They have the equipment and know-how to turn granite and marble to shiny glass

Originally Posted by northpaw

How much lapping does it need? I've no experience with lapping huge stones, but I can tell you that the bulk of your work needn't involve higher grits. Once you get it flat enough with the lower grits, I'd probably just set the hone on a counter and polish the top with sheets of wet/dry sandpaper taped to your stone plate.

This is what I thought of just was not sure about edges of those papers damaging the work.

Originally Posted by shooter74743

Take it to a place that does marble & granite counter tops. They have the equipment and know-how to turn granite and marble to shiny glass

Only trouble is that on this side of pond the price is a bit steep and also this hone is the only one with the history and I would prefere to stay in low speed.

Originally Posted by adrspach

Only trouble is that on this side of pond the price is a bit steep and also this hone is the only one with the history and I would prefere to stay in low speed.

slap to sheets onf sand paper on flat surface and lap with running water.I doubt you will have any problems

post some pic of this stone

What about lapping grit on a hard flat surface?

I'm also curious to see pics.

What was such a huge hone used for?

What! 8" x 17"

Thats a bench top not a sharpening stone lol

How about one of the 10" by 4" DMT Lapping plates sideways? lol Maybe you could create a metal rail system on either side of the stone that keeps the DMT plate level all the way across (as you would have 2" either side with that plate) and drop the rails half mm each time until you get it how you want it.





The same method as you would use to flatten ground for paving etc. With paving you sink two pieces of wood or metal into the ground, level it and then drag a third piece of wood or metal across to make it level and remove any excess dirt. (in your case excess stone lol)

If you have some patients, a few spare hours and a workshop you could make a jig to do this. I would make it so its adjustable up and down from all 4 points.

what would a stone that size be used for!?!?