READING A VERNIER CALIPER - Continued
Most vernier calipers read OUTSIDE on one side and
INSIDE on the other side. If a scale isnt marked, and
you want to take an inside measurement, read the scale
as you would for an outside diameter. Then add the
measuring point allowance by referring to manufac-
turers instructions or the following table.
6 inch or 150 mm
Add 0.250 inch
Add 6.35 mm
12 inch or 300 mm
24 inch or 600 mm
36 inch or 600 mm
READING A METRIC CALIPER
The steel rule (1) is divided into centimeters (cm) (2) and
the longest lines represent 10 millimeters each. Each
millimeter is divided into quarters.
The vernier scale (3) is divided into 25 parts and is
numbered 0, 5, 10, 15, 20 and 25.
Read the total number of
millimeters (4) to the
left of the vernier
zero index (5) and record
. . . . . . . . . . . . .32.00 mm
Read the number of quarters (6)
between the millimeter mark
and the zero index and record
. . . . . . . . .25 mm =
Read the highest line on
the vernier scale (3) which
lines up with the line on
the scale (7) and record
. . . . . . . . . . . . . .
CARE OF CALIPERS
Store calipers in separate containers provided.
Keep graduations and markings on all calipers
clean and legible.
Do not drop any caliper. Small nicks or scratches
can cause inaccurate measurements.
Protect caliper points from damage.