Metric Micrometer - Cub Cadet Challenger Series Service Manual

Adjustment
Before using a micrometer, check its
adjustment as follows:
Clean the anvil and spindle faces.
To check a 0-1 in. or 0-25 mm
micrometer.
Turn the thimble until the spindle
contacts the anvil. If the micrometer has
a ratchet stop, use it to ensure that the
proper amount of pressure is applied.
If the adjustment is correct, the 0 mark
on the thimble will align exactly with the
0 mark on the sleeve line. If the marks
do not align, the micrometer is out of
adjustment.
Follow the manufacturer's instructions to
adjust the micrometer.
To check a micrometer larger than 1 in.
or 25 mm use the standard gauge
supplied by the manufacturer. A
standard gauge is a steel block, disc or
rod that is machined to an exact size.
Place the standard gauge between the
spindle and anvil, and measure its
outside diameter or length. If the
micrometer has a ratchet stop, use it to
ensure that the proper amount of
pressure is applied.
If the adjustment is correct, the 0
mark on the thimble will align
exactly with the 0 mark on the
sleeve line. If the marks do not
align, the micrometer is out of
adjustment.
Follow the manufacturer's
instructions to adjust the
micrometer.
General Information
1‐20
Care
Micrometers are precision instruments.
They must be used and maintained with
great care. Note the following:
1. Store micrometers in their
provided case or separate
padded drawers in a tool box.
2. When in storage, make sure the
spindle and anvil faces do not
contact each other or another
object. If they do, temperature
changes can cause corrosion that
will damage the contact faces.
3. Do not clean a micrometer with
compressed air. Dirt forced into
the tool will cause wear.
4. Lubricate micrometers with WD-
40 to prevent corrosion.

Metric Micrometer

The standard metric micrometer
(Figure 24)
is accurate to one one-hundredth of
a millimeter (0.01 mm). The sleeve line
is graduated in millimeter and half
millimeter increments. The marks on
the upper half of the sleeve line equal
1.00 mm. Each fifth mark above the
sleeve line is identified with a number.
The number sequence depends on the
size of the micrometer. A 0-25 mm
micrometer, for example, will have
sleeve marks numbered 0 through 25 in
5 mm increments. This numbering
sequence continues with larger
micrometers. On all metric micrometers,
each mark on the lower half of the
sleeve equals 0.50 mm.