20 inch Oscillating Flat Lap

For producing flat surfaces easily there`s nothing like an oscillating lap! This new lap uses a precision shaftdriven offset that produces a true orbital action of over 1100 cycles per minute. Get flat, smooth surfaces on geodes, bookends and slabs quickly and quietly, without the bounce and splash of ordinary vibrating laps. Has a innovative elastomer support system that eliminates all of the old-fashioned lap parts - no more springs, balls or cables! Features a heavy gauge welded steel frame that provides great stability and won`t walk around on the floor or bench. Comes complete with cast aluminum grinding and polishing pan (with pad), heavy-duty bearings & easy to level adjustable feet. These machines come complete with two pans: an aluminum grinding pan and a separate polishing pan with its own polishing pad. Pans are easily removable for cleanup. Ships by courier only in one very large box; please allow up to two weeks for delivery. Made in the USA.

Flat Lapping Tips from Lortone
Start with a good cut. Nothing takes longer than trying to remove saw marks. Get your saw and blade tuned up and you will see a dramatic drop in your lapping times. Suggested sequence for polishing: starting with 220 medium grit, 400 and finer grit, then 600 pre-polish and finally optical grade cerium oxide or tin oxide.

Use fresh grit... As the rocks grind down, the grit gets contaminated with rock dust and becomes less effective. By changing your grit every 4-8 hours you'll get maximum cutting efficiency.

Keep Everything Clean... We can't stress this enough. Any grit that is cariied over to a finer stage will cause scratches and prevent the stones from polishing. Make sure that there are no small rock chips or other items on the polish pad. Even household dirt can ruin an otherwise good finish. Keep your polish pan in a plastic bag.