what is the smallest part of a mm that can be estimated using the micrometer caliper?

Question

another question:
what is the smallest part of a mm that can be estimated using the micrometer caliper?

another question:
what is the smallest part of a mm that can be estimated using the vernierer caliper?

Answer 1

Use the micrometer caliper to measure the diameter of the copper wire.
The micrometer caliper is used to measure distances with more precision than a vernier caliper. It has a 0.5 mm pitch screw, this means that you read millimeters and half millimeters along the barrel. Every revolution of the ratchet knob will open the jaws a half millimeter. The sleeve is divided into 50 divisions corresponding to one hundredth of a millimeter (0.01 mm) each. To take a measurement place the object between the anvil and the spindle, grip the ratchet and turn until the object is lightly gripped, do not overtighten. The first part of the measurement is taken from the barrel, each division is 0.5 mm, note that the millimeters and half-millimeters are on opposite sides of the line. Next obtain the reading of the sleeve and add this value to the reading you obtained from the barrel.
1. Obtain the reading when the surfaces of the anvil and the spindle are in contact. This is the zero reading of the micrometer caliper, it can be either positive or negative. Record the zero reading to 0.0001 cm.

Answer 2

I would need to know the exact instrument you are using since these are available in different grades. However, I'll venture an opinion. Likely, if this is a good one, being used manually by a skilled person, the instrument itself, when properly zeroed, can be used to accurately measure increments as small as .0025mm. One person commented on the markings on the barrel and the pitch of the ratchet screw. He is correct but theses may vary because there are different quality grades for these instruments. The human factor introduces a greater chance of error than the instrument. One must be trained and practice regularly to properly use metrology equipment correctly.
When one is measuring very small increments several environmental factors also come into play. To get a proper measurement the item and tools should be in an area that is 70deg F and fairly low humidity. The part should not be held overly long or the temperature will be raised to your body temp causing expansion. Hands, part, tool and area should be clean because at .0025 mm increments you may begin to have measurements influenced by dust, layers of moisture, residual coolants from machining or lubricating on the part etc.

In response to your second question about verniers:
Trusting any measurement closer than .05mm, about .002", is very questionable. Even well trained people can easily make errors with calipers due to misalignments of the instrument on the part being measured, spring in the instrument, etc.

Answer 3

Part Of Micrometer

Answer 4

the smallest part of a mm that can be estimated using the micrometer caliper is 10^-3mm
bcoz
1micrometer=10^-3 mm
this means 1 micrometer=0.001 mm

Answer 5

in many circumstances, in the faculty labs 9 MSDs are divided into 10 VSDs. subsequently, the least count variety of this vernier calipers would be equivalent to ( 1MSD - 1VSD) that's comparable to .one million mm or .01 cm. yet in the engineering marketplace extra precise vernier callipers are getting used. the place LC would be nevertheless smaller.