12-21-2021, 08:29 AM
There is another post about calipers so I thought I would weigh in on Digital calipers. And I hope what is written will help some to have an easier time with reading a caliper and converting the measurements in their heads.
Think of an inch as being equal to $10. There are 1000 pennies in $10, and there is 100 pennies in one dollar and there are 10 ( one dollars bills) in a $10 bill.
In my day 1/2 dollar coins were as common as quarters, so if you had a 1/2 dollar you had 50 cents written decimally is .50 So half of $10 is $5 or .500 of one inch.
There is 25 pennies in a quarter so a quarter of 1000 pennies is 250 or $2 and 50 cents or 2.50 and one quarter of 1 dollar 25 pennies or .250 Therefore an inch and 1 quarter is equal 1.250 if reading a digital caliper.
When I grew up there was no such of a thing as a calculator so it was done in the head or on paper. But Mother gave my sister and I a quarter and told us to share it, we argued over who got the extra penny. Anyway 12 and 12 is 24 and half a penny is .5 so what you have is 12 1/2 cents written as .125 And .125 is 1/8th of 100 pennies.
In other words think in pennies and move the decimal point to places to the left. so 3/8ths of an inch is equal to a quarter (.25) ( .125 x 2) and 1/2 of a quarter or 12 and 1/2 cents (.125) or 25 pennies and 12 and 1/2 cents or 37 and a half cents or .375 of an inch. so if the dial caliper says .625 you have 1/2 ( 4 eights and .125 or one eight) and 4 and 1 is 5 or 5/8ths of an inch.
If your dial caliper reads 1. 25 think of it as one dollar and 250 pennies. or 1 and 1/4 inches.
My mind thinks in dollars and cents not what 128 of an inch is. I have no idea of what that is and it is. None of my steel rules or tape measurers have it.
I hope this has helps some of you and it you use it it will become part of you . 1.25 and 1.25 will become 2 1/2 inches in your head which can be read on a tape measure. or 1 1/4 and 1 1/4 will be seen a 2 1/2
I can brake it down farther for you id you would like, Just let me know
Where do I use it. I want to raise my saw blade so I can cut a groove 1 /4 of an inch deep. 1/4 is .250 so I raise it 250 on the dial. And my Oneway gauge has a 1/2 inch diameter point on it and is direct reading. Since on most table saws the blade comes up on an arc the center line of the blade changes so I can rotate the blade and find top dead center. There is no need for brass set up blocks or digital height gauges
[attachment=39459]
Tom
Think of an inch as being equal to $10. There are 1000 pennies in $10, and there is 100 pennies in one dollar and there are 10 ( one dollars bills) in a $10 bill.
In my day 1/2 dollar coins were as common as quarters, so if you had a 1/2 dollar you had 50 cents written decimally is .50 So half of $10 is $5 or .500 of one inch.
There is 25 pennies in a quarter so a quarter of 1000 pennies is 250 or $2 and 50 cents or 2.50 and one quarter of 1 dollar 25 pennies or .250 Therefore an inch and 1 quarter is equal 1.250 if reading a digital caliper.
When I grew up there was no such of a thing as a calculator so it was done in the head or on paper. But Mother gave my sister and I a quarter and told us to share it, we argued over who got the extra penny. Anyway 12 and 12 is 24 and half a penny is .5 so what you have is 12 1/2 cents written as .125 And .125 is 1/8th of 100 pennies.
In other words think in pennies and move the decimal point to places to the left. so 3/8ths of an inch is equal to a quarter (.25) ( .125 x 2) and 1/2 of a quarter or 12 and 1/2 cents (.125) or 25 pennies and 12 and 1/2 cents or 37 and a half cents or .375 of an inch. so if the dial caliper says .625 you have 1/2 ( 4 eights and .125 or one eight) and 4 and 1 is 5 or 5/8ths of an inch.
If your dial caliper reads 1. 25 think of it as one dollar and 250 pennies. or 1 and 1/4 inches.
My mind thinks in dollars and cents not what 128 of an inch is. I have no idea of what that is and it is. None of my steel rules or tape measurers have it.
I hope this has helps some of you and it you use it it will become part of you . 1.25 and 1.25 will become 2 1/2 inches in your head which can be read on a tape measure. or 1 1/4 and 1 1/4 will be seen a 2 1/2
I can brake it down farther for you id you would like, Just let me know
Where do I use it. I want to raise my saw blade so I can cut a groove 1 /4 of an inch deep. 1/4 is .250 so I raise it 250 on the dial. And my Oneway gauge has a 1/2 inch diameter point on it and is direct reading. Since on most table saws the blade comes up on an arc the center line of the blade changes so I can rotate the blade and find top dead center. There is no need for brass set up blocks or digital height gauges
[attachment=39459]
Tom
