The 20" Rociprolap lapping machine is available again by owners, DNS Engineering, Inc. (formerly owned by Rose Enterprises). The Rociprolap is a precision built machine designed to eliminate the manuel work of lapping and polishing. This machine operates as its name implies; the lap plate revolves slowly (about 4rpm) and reciprocates 575 times per minute simultaneously. It is balanced and does not need to be bolted down. Extremely quiet in operation. Built to industrial standards, all cast iron and steel construction. (Please note: the splash guard has been changed from stainless steel to Formica as of June of 2005. This saved raising the price of the unit by several hundred dollars. We have found that Formica works better for several reasons: 1. It is easier to clean; 2. Has allows us to keep the price stable; 3. It can be rolled up and shipped in a small carboard box saving the customer much in shipping.) You should be very pleased with the mirror polish on your lapped specimens. The lap plate has cavities 3/16" X 1/2" which helps distribute the grit. The Rociprolap will lap rock, wood, metal, glass or any material which must be optically flat. It is especially suited to lap compressor valves. Sold complete with splash guard, bumper ring, 1/3 horse motor, and a complete set of instructions plus two sets of nylon ball bearings and one set of steel discs. For extra sets of steel discs or ball bearings or extra lap plate see LAPIDARY PARTS AND SUPPLIES. Guaranteed for one year from date of purchase against any defects in material, excluding the nylon thrust bearings and steel discs. The lap plate weighs approximately 50 pounds. The new 2008 price for the 20" Rociprolap is $1941.00, plus crating fee of $80.00 for a total of $2021.00. F.O.B. Redlands, CA. For European electrical systems a conversion setup for 220V50/60Hz is available for an additional $50.00 fee. The discount will be applied at the SHOPPING CART. Please call for shipping rate information for motor truck freight. Approx. shipping weight is 237 pounds. For tips on how to use the Rociprolap, see the article, Basic Lapping Procedures listed under the category LAPIDARY TIPS.