Measuring instruments(part 3 final)

Micrometer Screw Gauge

This instrument can measure up to 0.01mm and each division represents 0.5mm. The micrometer screw gauge is can be read using the following method:
1. Read the main scale reading at the edge of the thimble.
2. Take the thimble reading opposite the datum line of  the main scale.
3. The reading is found by adding the main scale reading to the thimble reading.
The zero error for the micrometer screw gauge is the same as the one for the vernier caliper.