Step 1:
Clean the surface of the circlip with a cloth to remove oil and other residues from production process. Ensure that anvil faces are clean then set the micrometer at zero using the ratchet before measurement begins. See figure 2 for ratchets.


Step 2:
Hold micrometer in palm of hand so that ratchet can be rotated with thumb and index finger. Holding component comfortably and in a position that the read out of the micrometer can be seen, measure the component. See figure 1


Step 3:
(Used on products blanked from strip)
Using a point micrometer or a ball micrometer position the anvils opposite to free gap, and in the middle of beam/wire section.

Anvils must be perpendicular to the surface of the circlip


Step 4:
(Used on products coiled then blanked from wire)
Using a flat micrometer position the anvils opposite to free gap, and measure thickness on the functional edge of the part:
- internal edge for external circlips.
- external edge for internal circlips.
See figure 3


Notes:

Figure 4 shows three micrometer anvil types that are typically used to measure material/component thickness. The type used to perform measurement is defined by the control plan.