Figure 3-16. Drum floor sander
Figure 3-17. Floor edger
c. Power Buffers. There are two types of power buffers; one type is used to buff wood floors,
and the other type is used to put a high polish on metal surfaces. Buffers are cleaned in the same manner
as other power equipment by removing dust from the motor with compressed air.
(1) Floor buffer. A floor buffer weighs approximately 30 to 40 pounds. The polishing pads
vary in size from 12 to 22 inches and are made of nylon, animal hair, or hog bristles. The pads can be
obtained in coarse-, medium-, and fine-bristled materials.
(2) Metal buffer. A metal buffer is a rag wheel that is installed on a power tool or a bench
grinder. It is also used with a flexible-shaft machine or in a portable drill that is equipped with a special
chuck. The rag wheel is charged with a buffing compound (jeweler's rouge, rottenstone, or pumice). It
is essential that you wear a face mask and gloves to protect you from fine particles that come from the
rapidly turning, charged rag wheel. The fine particles are capable of cutting your flesh.
d. Portable Power Grinders. Use grinders to remove scale or encrustation from metal surfaces.
The tool, as shown in Figure 3-18, page 3-16, is driven by an electric motor that uses 110-volt, 60-cycle
alternating current. The electric motor in the grinder is geared and has a chuck. The features make it
possible to attach different grit-sized abrasive wheels. The action of the grinder may be clockwise or
counterclockwise. You must wear goggles when you are using a grinder, and your safety guard must be
in place. You should use reinforced abrasive wheels and never exceed the operating speed indicated on
the wheel blotter.