Complete 2014 Catalog

76

ROTATING DISC FLAT LAPS

ROTATING DISC FLAT LAPS

Now you can polish your bookends and large flats on the same machine, using either our Magnetic Novas or the standard process using abrasives on the rotating disc itself.

We've modified our RL Model Rotating Flat Laps to accommodate the speeds and set up necessary for both processes. For the fastest and most efficient way to polish large flats, we recommend using our Magnetic Nova Laps. You save time in two ways. First, the actual polishing process for each step is reduced by the speed and ef- ficiency of our resin-bond diamond Magnetic Nova Laps. Under normal circumstances, it only takes 15 to USING DIAMOND MAGNETIC NOVAS Our diamond Magnetic Novas are the fastest and most efficient way to polish large slabs on the RL Lap machines. Our recommended general-purpose grit sequence of Magnetic Novas for RL machines is 30, 60, 280, 600 and 1200 grits, followed by Super Premium Cerium Oxide Polish on a felt pad. We also recommend the use of a 60 grit Plated Diamond Disc to precede the 60 grit Magnetic Nova for those slab surfaces with deep saw marks or other features requiring grinding preparation. Other grit sequences can be used to fit your need We recommend that Magnetic Novas in diameters 12" and larger be used with 1" arbor holes. The hole prevents the "dead" center of the revolving lap from "grabbing" your work piece, yet does not prevent you from using the entire surface of the lap. USING THE STANDARD LAPPING PROCESS If you need to precision grind and polish a flat sur- face on stone, glass or optics, use the cast iron lap plate of the RL lap, and a series of silicon carbide or other abrasives. The rotating cast iron plate is built to fulfill the fundamental requirements of precision lapping with maximum stability and wheel balance. Lap plates are machined to exacting tolerances and grooved with concentric V-groove circles for reten- tion of the abrasive. Your surface will be FLAT. Standard grit sequence for most purposes is 60/90, 220,400, 600, 1000, followed by a polish. We recommend our Super Premium Cerium Oxide sold on page 72.

25 minutes for each grit step to polish your large flat. Second, you save a lot of time by not having the usual clean-up job between grit changes. Changing grits with Magnetic Novas simply means removing one flexible lap from the plate and installing the next—taking only a few moments at most. (See photo below.) Since the diamonds in Magnetic Novas are permanently bonded to their working surfaces, there’s little chance of contamination.

Magnetic Novas are easy to exchange. To order Magnetic Novas see page 78.

Model 12RL