Is a "Tenth" = 0.1" or 0.0001"

[miljnor]

isn't it imperial messurement? so wouldn't it be imperial machinist not, American machinist? Wait! does that make us Imperialist?

Damn i guess all those old movies are right! We are imperialist pigs!

[ger21]

The only other thread angle that I know is acme at 15 degrees; although if you use the same measuring protocol as for unified I think you should call acme a 30degree thread angle. Unified is 60 degree included angle and acme is 15 degree flank angle.

Acme is 29°.

[keithorr]

I don't try to decipher what the speaker is saying. I just smile and nod. Then I refer to the drawing for specifications.

I come in contact with "Designers" who imagine pretty things in their heads but can't communicate their needs.

The big rule I have is: No drawing in the air with your fingers.

The client is responsible for supplying valid CAD drawings via email. If they can't handle that, I can't do business with them.

I had a designer in my shop who wanted to sketch his idea on the shop floor with chalk, which was what he did post-war as a glass designer in W. Virginia. I told him it was 2003, not 1953. He looked confused until I spelled it out.

[miljnor]

Everything in writing
I don't try to decipher what the speaker is saying. I just smile and nod. Then I refer to the drawing for specifications.

I come in contact with "Designers" who imagine pretty things in their heads but can't communicate their needs.

The big rule I have is: No drawing in the air with your fingers.

The client is responsible for supplying valid CAD drawings via email. If they can't handle that, I can't do business with them.

I had a designer in my shop who wanted to sketch his idea on the shop floor with chalk, which was what he did post-war as a glass designer in W. Virginia. I told him it was 2003, not 1953. He looked confused until I spelled it out.
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Your talking crazy man!

whered that come from, and I am glad you got that off of your chest!

[Geof]

Acme is 29°.

Yeah; I guess if I pick up mistakes made by other people I should hang my head in shame; consider it done!

[Chris D]

The way I learned it, in high school math a "tenth" is .100, and in machine shops a "tenth" is .0001.

Being relative to what?

.1 is a tenth of an inch

.0001 is a tenth of a thousandth.

Machinists are more concerned with thousandths than they are about inches.

Just like being in a car, when someone says it's a tenth up the road, I think it is pretty safe to assume they are not talking about a tenth of an inch :-)

[cadman]

When you say a "tenth" to a non-machinist and ask them to write it down on paper, nine times out of ten it will be .100, just the way the old high school math teacher taught. Say "tenth" in most machine shops (non metric shops) and it is understood to be .0001. Its been quite a few years since I've heard someone say "one ten thousandth"

People outside of manufacturing will rarely, if ever, run into a unit of measurement smaller than .100, with exceptions like mechanics, people with home shops, etc... . For those people a "tenth" as in .100 is as small as it gets.

[JPMach]

.100 = hundred thou
.010 = ten thou
.001 = one thou
.0001 = one tenth
.00001 = 10 millionths
.000001 = 1 millionth

At least thats what I am used to, the super precision lathe I run at work has resolution to 10 millionths. I know when you put it in jog mode and select .00001 for res you can spin the dial all day long and it seems like the thing never moves.

JP

[keithorr]

Your talking crazy man!

whered that come from, and I am glad you got that off of your chest!

I think ChrisD hit it right when he wrote it's just slang.
Using vernacular within a shop can/might work when all the employees are on the same page. Communication between organizations should not include assumptions.

I know my life is easier when I make the client spell it out on the drawing. I don't care what a "tenth" is. I can't even get my dealer to tell me what an "eighth" is. Is is gross and include the ziplock or is it tare? It never seems to come out to my advantage.
"0.0001" I understand.

[miljnor]

I know what you ment

I was just razzing you because the post was somewhat off (do to the other posts lack of "customer input" in the discussion)

just couldn't resist.

no hard feelings (hopefully)

[rajhlinux]

Hello,

Is it correct to say 15 tenths is 0.00015" ?

Thanks.

[Jim Dawson]

Hello,

Is it correct to say 15 tenths is 0.00015" ?

Thanks.

That would be 150 millionths or 1.5 tenths.

[mactec54]

Hello,

Is it correct to say 15 tenths is 0.00015" ?

Thanks.

Way to go you revived a very old thread

No that would be .0015" or one and a half thousandth

[rajhlinux]

That would be 150 millionths or 1.5 tenths.

Hello Mr. Dawson, thanks for your reply, hope you're doing well.

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Way to go you revived a very old thread

No that would be .0015" or one and a half thousandth

Alright, so when I see 0.0015" it means 15 tenths, got it.

Could it also be said: "one thou and 5 tenths" ?

Thanks.

[mactec54]

Hello Mr. Dawson, thanks for your reply, hope you're doing well.

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Alright, so when I see 0.0015" it means 15 tenths, got it.

Could it also be said: "one thou and 5 tenths" ?

Thanks.

Yes, it could, but terms of saying it, you would say one and a Half thou

[servtech]

Yes, it could, but terms of saying it, you would say one and a Half thou

A tenth is always 1/10th or 0.1 irrespective of the system

0.1 mm
0.1 inch
O.1 degree
0.1 of an orange.

[servtech]

Hello Mr. Dawson, thanks for your reply, hope you're doing well.

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Alright, so when I see 0.0015" it means 15 tenths, got it.

Could it also be said: "one thou and 5 tenths" ?

Thanks.

You have to specify 1/10th

Tenth of an inch
Tenth of a thou
Tenth of a micron
Tenth of a gallon
Tenth of an orange

[metalmayhem]

You have to specify 1/10th

Tenth of an inch
Tenth of a thou
Tenth of a micron
Tenth of a gallon
Tenth of an orange

calling .0001 a tenth is common shop floor talk/slang and it's just a given , .0002 is two tenths . One tenth of an inch is not a reference we would normally use , it would be a hundred thou (unless the drawing showed dimensions in fractions vs decimal)
Outside of machining a guy would say one tenth thousands of an inch because people will naturally view one tenth as 1/10th

[Jim Dawson]

When using the Imperial system of measurement and in the machine shop, the basic unit of measurement normally is 0.001'' (thou or thousandth). So 0.100 would be spoken (in machine shop speak) as 100 thou. A spoken tenth would be 0.0001'', or a tenth of a thousandth.

[mactec54]

A tenth is always 1/10th or 0.1 irrespective of the system

0.1 mm
0.1 inch
O.1 degree
0.1 of an orange.

No that is incorrect when you are talking about .00015"

.0001" = .00254mm