Over a past number of years more sensitive measuring instruments have been developed due to the need of satisfying requirements for higher accuracy. These newer types of instruments however, are of the comparator type and require a setting master. Also, the measurement range can be rather small. Micrometers have an advantage over these gauges as they can measure absolute lengths over a much larger range. Smaller micrometers are widely used due to their versatility, although the larger micrometer types have been replaced for applications with tighter tolerances. In comparison to other measuring instruments, micrometers are relatively cheap and their operators require very little training. The digital micrometers, rather than the analogue, are much more reliable as they eliminate parallax error and are easier to read. Internal micrometers use the same scale and mechanism but are used to measure large bores.
Types of Micrometer
- The thimble should run evenly and not stick.
- The ratchet should turn smoothly.
- The zero line on the spindle should align with the index line that is on the micrometer sleeve.
- The end of the thimble should be aligned with a graduation line on the sleeve and not cover it.
Micrometer Capability Charts
QCI Group can assist with any inspection you with any inspection activities across multiple sectors. We carry inspection for some of the largest manufactures in Aerospace, Rail, Automotive, Oil & Gas and Power Generation. We offer subcontract CMM Inspection, optical measurement, FIA & LAI support, ISIR, PPAP, revese engineering and much more. Follow the link for more infomation on our services.