Coolant Proof IP65 protection level means the micrometer is dust tight and protected against water jet. In our laboratory test we would apply water jets under standardize pressure condition for 30 minutes. Designed to work in adverse condition exposed to coolant, water, dust, or oil, even if the caliper is splashed with coolant or water, there is no need to wipe or clean the spindle. Anti-corrosion treatment is required after exposing to water or coolant environment.
Carbide tipped measuring face is precision ground and micro lapped to give a mirror finished with 0.3um / 0.000012" flatness. Enhanced grip by integrating cross knurling pattern into the plastic mold on the side and bottom surface of the frame. Spring loaded ratchet mechanism applies constant clicking force to workpiece to ensure repeatable measurement.