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# What is the function of the thimble in the micrometer?

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## Related Questions

###### Asked in Math and Arithmetic, Mechanical Engineering, Measuring Tools

### How do you calculate least count of micrometer?

Hi, heres how you calculate least count of a micrometer. Use the
given formula:
Least Count (L. C) = Pitch/no. of divisions on micrometer
barrel(thimble)
where,
Pitch = distance travelled by thimble on linear scale in one
rotation.
Hi, heres how you calculate least count of a micrometer. Use the
given formula:
Least Count (L. C) = Pitch/no. of divisions on micrometer
barrel(thimble)
where,
Pitch = distance travelled by thimble on linear sacle in one
rotation.

###### Asked in Physics, Length and Distance

### How can you find the zero error of a micrometer screw gauge?

This micrometer has zero error.
The zero marking on the thimble is below the datum line.
So this micrometer
has a positive zero error.
In this case we will take the reading on the thimble.
Thimble reading = 0.03 mm
So the micrometer has a zero error of +0.03 mm.
Whatever reading we take on this micrometer we would have to
subtract +0.03 mm
The zero marking on the thimble is above the datum line.
So this micrometer
has a negative zero error.
In this case we will have to count the number of divisions on
the thimble between the zero marking and the datum line.
No. of divisions = 3
Measurement of each division = 0.01mm
So the micrometer has a zero error of -0.03 mm.
Whatever reading we take on this micrometer we would have to
subtract -0.03 mm

###### Asked in Science

### What is the total movement indicated on the thimble if it has been rotated one revolution on a micrometer from zero?

It depends on the screw thread pitch (or "lead") in the heart of
the micrometer. Typically, screw pitches in common hand-held
micrometers are 40 per inch in an Imperial micrometer or 2 per
millimetre in a Metric micrometer. Thus, one full turn of the
thimble of an Imperial micrometer is 1/40th of an inch (25
thousandths of an inch or "25 thou") and similarly, one full turn
of the thimble of a Metric micrometer is 1/2 a millimetre (500
micrometres).

###### Asked in Math and Arithmetic, Machinery and Tools, Measuring Tools

### How do you read a micrometer?

In order to read a micrometer, you will use the numbers on the
thimble and on the sleeve. The numbers on the sleeve are broken
down into 4 parts. Think of them as dollars with whole numbers and
quarters. The numbers on the thimble can be represented as pennies,
or ones. If the sleeve is at 9 3/4 and the thimble is at 4, the
reading would be .979.

###### Asked in Measuring Tools

### What are the parts of micrometer caliper and their functions?

Frame, Anvil, Spindle, Spindle lock, Barrel, Thimble, and
Rachet. <--NovaNet!!
spindle
spindle
An outside micrometer consists of the following parts:
Frame - The body of the instrument.
Sleeve - Contains the vernier and scales, also houses the
spindle nut and thimble assembly.
Thimble - Houses the adjusting nut, ratchet and screws over the
spindle nut. The thimble and sleeve assembly enables the actual
opening and closing of the instrument over the work piece to enable
measuring.
Spindle - Attached to the thimble and protrudes through the
frame. Together with the opposite anvil the workpiece is measured
between the spindle and anvil faces.
Ratchet knob - Used to close the micrometer over the workpiece
to measure it.
Lock - Used to lock the spindle when a measurement is achieved
before removing the instrument from the workpiece.
Vernier and scale - This is imprinted on the sleeve and spindle
and is what gives the actual measurement.

###### Asked in Engineering, Machinery and Tools, Measuring Tools

### How do you use mitutoyo digital micrometer?

A digital micrometer is used exactly the same way as a standard
micrometer. The only difference is the way the measurement are
viewed. Here are the steps to follow for using a digital outside
micrometer:
Clean the anvil and spindle faces.
Push the "On/Off" or any other button on some and turn it
on.
Use a test piece (supplied with the micrometer) and close the
micrometer on it using the ratchet on the back of the thimble.
Push the "Zero" or "Reset" but to set the micrometer to
absolute zero.
Push the "in/mm" button to select millimeter or inch
measurements.
You are now ready to measure a component. Always use the
ratchet.
Inside micrometers work basically the same way but you can use
an outside micrometer to set the inside micrometer if you have no
test piece.

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