The Micrometer Caliper In Millimeters TM  4.4A
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hello there welcome back with a new lesson and technical math or listen 4.4 is about the micrometer caliber the first part of it will be about the metric micrometer caliber our objectives for this lesson is to learn how to read metric measurements on a micrometer caliber the micrometer caliber is an instrument for measuring very small links using the movement of a finely shredded rotating screw which gives it better precision than a vernier caliper it is used in technical fields in which fine precision is required micrometers are available in metric units and US units the metric one is graduated and read in hundredths of a millimetre the part of a micrometer we can see it in front of us you to use a micrometer properly place the object to be measured between the anvil and spindle and turn the thimble until the object fits snugly the perils of most metric micrometers are graduated in millimeters the micrometer also has graduations of half of millimeters which are indicated by the lower set of graduations on the barrel the threads on the spindle are made so that it takes to complete turns of the symbol for the spindle to move precisely one millimeter the head is divided into 50 equal divisions each division indicating 100 of a millimeter which is the precision to read a metric micrometer in millimeters let us look at an example of a measurement as we can see here in this picture looking to this part of the micrometer we can count here 1 milli meter because every line up here represents 1 millimeter if we look down here every line represents a half millimeter so we can say that we passed also half millimeter when we look finally to this line here we can read 2,500 of a millimeter add these numbers then you will have your reading for this measurement let us check our answer here this should be our correct answer yes it is correct let us see another example looking here we can see that we passed seven millimeters looking down here we bust also half millimeter after the seven millimeters looking to the head we have 2,700 of a millimeter add these numbers we will have seven and seventy seven hundredth of a millimeter let us check our answer this should be our correct answer yes it is correct another example now I’ll give you a chance to find the reading by yourself I think that you’re reading must be like this five millimeters add to it a half millimeter looking to the head you have thirty one hundredth of a millimeter this gives us a total of five and eighty one hundredth of a millimeter this should be our correct answer and it is correct another example we passed six millimeters we didn’t pass any half so only six full millimeters looking to the head we can see that we have 19 hundredth of a millimeter adding these numbers we would have six millimeters and 1900 of a millimeter so this would be our correct answer and it is correct in your example we have here four millimeters we don’t have any halves the head is pointing on 25 hundredths of a millimeter so our reading is four and a quarter millimeter another example and this line here represents a half millimeters the reading on the head 3300 of a millimeter adding these numbers our reading will be nine and eighty three hundredth of a millimeter a final example looking to this graduation here we have 15 millimeters looking down here we don’t have any halves looking at the graduation on the head we have 40 hundredths of a millimeter adding these two numbers our reading will be 15 and 40 hundreds of a millimeter by this example we come to the end of our lesson

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