COVINGTON ENGINEERING / AMERITOOL / LORTONE

Covington Engineering builds professional-grade lapidary equipment, including flat laps, grinders, trim and slab saws, and rock tumblers. The brand is favored by serious hobbyists and shops that want heavy-duty machines built to last.

A flat lap is a rotating disc machine used to grind, smooth, and polish flat surfaces on stones, cabochons, and glass. Covington and Ameritool flat laps let you step through grits to take a slab from rough to a finished polish.

For heavy or professional tumbling, look at rugged rotary tumblers with larger barrels and durable motors, such as the Covington and Lortone units in this collection. They are built for long run times and bigger batches than typical hobby tumblers.

Barrel capacity, often listed in pounds, tells you how much rough you can tumble at once. Smaller 3 to 6 pound tumblers suit hobbyists, while 12 pound and larger units handle bigger or more frequent batches. Pick a capacity that matches your typical load.

Yes. A double barrel rock tumbler lets you run two batches or two grit stages at once, which speeds up the polishing cycle and keeps stages from cross-contaminating. This collection includes dual barrel lapidary tumblers for that workflow.