Section II. METALWORKING MACHINERY

TM 38-260

NOTE

PERSONNEL PERFORMING THE CLEANING AND

PRESERATION OPERATIONS MUST BEAR IS MIND

THAT P-TYPE PRESERVATIVES CANNOT BE USED

INDISCRIMINATELY ON ALL KINDS OF MATERIALS.

PRESERVATIVES CAN PENETRATE TO UNWANTED

AREAS

AND/OR

CAUSE

SWELLING

DECOMPOSITION OF CERTAIN MATERIALS.

Section II. METALWORKING MACHINERY

4-4.

GENERAL

There are many different usage requirements for metalworking machinery. To meet these requirements, the machine

tool manufacturers have developed a wide variety of designs and sizes. In view of the many designs, no attempt has

been made in this manual to furnish complete details for processing each type. There are, however, areas and

assemblies that are common to many types. Instructions contained in the subsequent paragraphs will serve as a guide

for processing these areas and assemblies.

4-5.

DEFINITIONS

Coolant pumps. Coolant pumps are used to supply coolant to the cutting tools when the machine tool is in

operation.

Critical surfaces and items. Surfaces and items which are subject to chemical or physical deterioration.

(1) Critical item, chemical. Items which are of such a nature that any degree of deterioration (in the form

of corrosion, stain, scale, mold, fungi, bacteria) caused by oxygen, moisture, sunlight, living organisms, temperature,

time, and other contaminants will result in premature failure or malfunction of the item or equipment.

(2) Critical item, physical. Items which are of such a nature that a slight degree of physical action on the

item, or any integral surface thereof, renders it unfit for use. This includes items having a surface finish of 32

microinches (0.80 mm) or less, surfaces requiring a high degree of cleanliness and freedom from contamination as well

as those requiring special protection against shock, vibration, abrasion, and distortion.

c. External areas.

Areas on which the external assemblies travel and are usually unpainted or finished

precision external surfaces.

d. External assemblies. Assemblies which include, but are not limited to carriages, work tables, cross-feed

mechanisms, chucks, tool slides, turrets, and tail stocks.

4-2