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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
ROTATING DISC FLAT LAPS
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.
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.
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.
Model 12RL
Magnetic Novas are easy to exchange.
To order Magnetic Novas see page 78.