Glass.

TM 38-400/NAVSUP PUB 572/AFMAN 23-210 MCO 4450.14/DLAM 4145.12

Figure 5-47. Typical types of grinding wheels.

g. Cloth-backed thin discs. Cloth-backed thin discs

d. Straight and tapered wheels. Most straight and

should be supported and weighted the same as bonded

tapered wheels should be stored on edge in racks. The

wheels and should be stacked cloth to cloth and grain to

racks should provide two point cradle support for the

grain to avoid damage to the cloth backing. Also, this

wheels to prevent rolling. A sufficient number of

method of stacking will help to prevent warpage.

partitions to prevent wheels from tipping over should be

provided. An individual section is recommended for

h. Small-shaped wheels. Small-shaped wheels

each wheel of unusual shape.

such as plugs and cones should be stored in boxes,

e. Thin organic bonded wheels. Thin organic

bins, or drawers.

bonded wheels should be stored on a flat surface away

from excessive heat. A heavy steel plate or thick

5-37. Glass.

vitrified wheel makes a good foundation for stacking,

a. Storage. The RH in glass storage areas

and similar plate or wheel placed on the top of the stack

should not exceed 65 to 70 percent, because moisture

will help prevent warpage.

and dampness have a tendency to etch glass when it is

f. Cylinder, cup, and saucer wheels. Cylinder

stored for long periods of time. Glass should be stored

wheels and large straight cup wheels can be stacked on

in original containers until ready for issue. If glass is

the flat side with corrugated paper or other cushioning

removed from original containers, the three types of

material between the wheels, or can be stored in racks

storage racks generally used for storage are the "A"

similar to the racks used for storing straight wheels.

type, pocket type, and slotted type. Because of its

Large flaring cup wheels should be placed flat on a

fragility, glass should be handled with extreme care.

horizontal shelf, alternating the position so wheels are

Persons handling large sheets of glass should use

stacked base against base and face against face. Small

rubber grips or pads.

saucer, cup, and dish wheels, without thin, easily

b. Small size glass. Window glass and other small

damaged edges or rims, can be stored on edge.

size glass should be stored in pocket-type storage racks

if removed from original containers. If possible, the

racks should be constructed from

5-85