Figure 3-7. Mechanist's Scribers
(2) Tungsten carbide. Tungsten carbide tips
have extremely hard points and are used on hardened
steel or glass.
b. Use. Following is the basic procedure for the
use of a scriber:
(1) Place material to be marked on a firm
surface. Place a steel rule or straight edge on the work
beside the line to be scribed.
(2) Use fingertips of one hand to hold the
straight edge securely. Hold the scriber in your hand as
you would a pencil.
(3) Scribe the line by drawing the scriber along
the straight edge at a 45-degree angle and tipped in the
direction it is being moved.
c. Care. Observe the following practices for the
care of scribers:
(1) Protect points by reversing them in the
handle or placing a cork or a piece of soft wood over
(2) Keep the scribers clean and lightly oiled.
(3) Stow on a rack or in a box. TM 1-1500-204-
(4) Do not use scribers for other than intended
d. Repair. Scribers can only be repaired by
sharpening. Sharpen scriber points with a small oil
stone, Federal Specification SS-S-736, moistened with
3-5. Tapes and Rules. Tapes and rules are the
measuring instruments most often used for all general
measurements. They are graduated into fractions of an
inch that may be expressed as 1/2, 1/4, 1/8, 1/16, 1/32,
a. Tapes. There are several kinds and lengths of
tapes, but the one most often used is 6 feet long and
made of flexible steel. It is coiled in a circular case and
may or may not have one end fastened permanently to
the case. It is graduated on one side only in 1/16 and
1/32 inch divisions. A small lip on the end prevents the
tape from sliding completely inside the case and also
easily lines up the end of the tape with the end of a
piece of stock. Examples of typical tapes are shown in
Figure 3-8. Typical Tapes