vernier caliper and micrometer screw gauge least count formula - Quality Management motivational Quotes status, suvichar images

## 12/16/2019

vernier caliper and micrometer screw gauge least count formula

## vernier caliper-

Whether it is a small thing or a big thing to measure it, we need some instrument and some instrument has been made to measure it.

Of which the vernier caliper is one, it is a device in which any object can be measured. micrometer

Use of Vernier Caliper:-  Measure the height to measure the diameter And the vernier caliper is used to measurement the depth. In this, we measure it on the basis of the difference between the two scale.

It has the lowest count 0.02 mm or .001 "(inch), that means we can measure the readings of at least 0.02 mm or 0.001" (inch) from Vernier Caliper.

Main components of Vernier Calipers:-

Main scale, Vernier scale, Depth measureting bar, measuring jaws

Diagram of Vernier Caliper:-

1. Out jaws (to measure the thickness of an object)

2. inside jaws (to measure the depth of an object)

3. depth probe (to measure the depth of an object)

4. Main scale (readings in cm are taken)

5. Main scale (readings are taken in the inch)

6. vernier scale (readings in cm are taken)

7. vernier scale (readings in the inch are taken)

8. Retainer (back to the arjest)

How to calculate the least count of the Vernier Calipers:-

The 50 readings of Vernier Caliper are equal to reading 49 main scale. Then Vernier Caliper's list will count,

(1 main scale reading=1 mm )

(1 Vernier scale reading =49/50 mm=0.98 mm)

So finally our least count will be.
least count =1 mm- 0.98 mm
least count =0.02 mm (This is the least count of Vernier Caliper)

Example

We have to use a formula for reading Vernier Caliper.

Dimension measured = main scale reading➕ (vernier scale reading ❌ least count)

Here the main scale reading is 24mm. The reading of vernier scale is 35mm and the least count is 0.02.

Dimension measured = 24mm + (35mm ❌0.02mm)

Dimension measured = 24mm + 0.7mm

This is the final reading of our component = 24.7mm

## Digital vernier caliper images-

Digital Vernier Caliper-
now-a-days it is used very much because the digital vernier caliper detects the accuracy of any object and is very accurate And in this, any small object can be measured. digital vernier caliper digital vernier caliper images
what is micrometer and types of screw gauge how to use fuction out side parts Digital vernier caliper.

## What is micrometer-

As the name of the micrometer suggests only Micro means the smallest thing can be measured by it. From 0.1mm to micrometer Measure the measure of 100 times less.

Use of micrometer-

The use of the micrometer is used to measure length diameter and thickness of any small object. And it works on the principle of Nut and Bolt. And its least count (reads at least the readings easily)

it happens 0.01 mm OR 0.001 cm. The circular scale is of 100mm.

Theory of Micrometer (Screw Gauge) -

If we have any thin sheet, then we can extract its thickness too. If we have any thin sheet, then we can extract its thickness to. For this we need screw gauge, it is also called micrometer.

Why is its name screw gauge? gauge means the diameter of something or how thick it is to measure it andThe screw meant that the texture is like a screwSo its full name was screw gauge.

What are the things we need to calculate the thickness of any object-
First need screw gauge second The object of which is to get us thickness And the third meter scale.

The screw of the screw gauge is rotated when clock wise.Then it goes onwards. And When it is rotated anti clock wise. Then it goes backwards. The circular which is made in the micrometer He passes near. And The space between all these is equal to one.

The interval of the upper end between these two circles is the interval.We call them the gap between these two circlet intervals. Or It is also called pitch.

When we rotate one round to the circular scale, the clockwise or anti clockwise So this 0.5 mm to 1 mm will move forward or backward. Circular scale consists of 0 to 100 marks, This means 100 divisions on this circular scale.

Usually measured in millimeters (mm). A pitch of a screw gauge can be 0.5 mm or 1 mm. Screw gauge can be 0.5 mm or 1 mm according to the pitch Then the number of circular division can be 50 divisions or 100 divisions.

When we rotate one round to the circular scale So far as the liniar scale goes forward or behind, it tells the pitch. Or can say that the distance between the circlet is called a pitch. In the screw gauge we have, the distance between the two circlet is 1mm. The circular scale has been divided into 100 parts.

When we rotate this whole round, then it goes 1mm forward or backward. It means it's the least number of counts 100 mm of 1 mm or 1/100 means 0.01 mm.

then

least count =  1 /100 =  0.01 mm

If you rotate it half way Then it goes 0.5 mm forward or backward. It means  the least number of counts 50 mm of ०.5 mm or ०.5/50 means 0.01 mm.
then
least count =  0.5 /50 =  0.01 mm

## Main components of Micrometer-

1- Sleeve (main scale is above it)

2- Lock nut (Lock nut is used before reading, so that it does not shake)

3- Spindle (It is attached in the right side of the micrometer and it moves towards left and right.)

4- Anvil (It is located in the left side of the micrometer and it fixes in one place)

5- Frame (This is frame of micrometr. All components are connected to this frame)

6- Thimble (this is connected with the sleeve and has circular scale in it and circular scale is 50 mm scale)

7- Ratchet stop (This works to move the spindle)

How to calculate the least count of the Micrometer-

When the thimble is rotated half the spindle then the spindle goes 0.5mm further. We call it pitch. Then the number of division on the circle scale will be 50mm.

Least count is a formula.

Least count = pitch of the micrometer / number of division on circle scale

Least count = 0.5/ 50 = 0.01mm

This is the Least Count (minimum count) of the micrometer.

When a full round of thimble is rotated then the spindle goes forward 1mm.Then the number of division on the circle scale will be 100 mm. Then it will be Lest count 0.01mm.

Least count = 1/ 100 = 0.01mm

This is the Least Count (minimum count) of the micrometer.

The low count = 0.5 / 50 or 1/100 = 0.01 mm or 0.001 cm.

We have to use a formula for reading Micrometer.

Dimensions  measured = Main scale reading +(Thimble scale reading 🗙 Least count)

We will have to use this method to measure any readings in Micrometer.

As shown in the diagram Here we keep a small component between spindle and anvil. And set it with the help of thimble. And lock it with the help of lock nut. Then we read the main scale that (5 + 0.5) That is Our main reading is 5.5mm.The reading of thimble scale is 28 mm. We will set this reading in the formula.

Dimensions  measured  = main scale reading + (thimble scale reading 🗙 least count)

Dimention  measured  = 5.5mm +(28mm 🗙 0.01mm)

Dimention  measured = 5.5mm+ (0.28mm)

Final Dimention  Reading = 5.78 MM  This is  final reading of our component.
Vernier Caliper and Micrometer screw gauge least  count and formula what is micrometer and types of screw gauge how to use fuction out side parts Digital vernier caliper.