The Offcial Machinist Thread: Revised 01/04/2014

[jackssmirkingrevenge]

This is not ideal but better than nothing.

This is better

[Crna Legija]

This is not ideal but better than nothing.

This is better

lol i doubt he knows how to read a vernier caliper, lol i didn't, 2 days ago

[jackssmirkingrevenge]

There's nothing to it

What do they teach you in science classes then? Do you watch episodes of Braniac

[Labtecpower]

Do you watch episodes of Braniac

Actually I did still had a 9,3 out of 10 at central exams.

I didn't know how to read a vernier caliper until previous school year..

[Crna Legija]

What do they teach you in science classes then? Do you watch episodes of Braniac

Defiantly didn't get tough how to use a vernier anything, i remember watching mythbusters a few times, and that i had already seen though's episodes

I didn't know how to read a vernier caliper until previous school year..

Not surprised I bet the majority of active members wouldn't know how to use one too. There's no need to unless you have your own mill/lathe or use one for your job even then the .01-.02mm you get from a digital one is good enough for most things.

[jackssmirkingrevenge]

I used a micrometer screw gauge as part of my previous employ measuring the thickness of stretch wrap during incoming inspection, however I remember learning about reading a vernier scale during physics class before the age of 16.

[LeMaudit]

You all should learn how to use a scale rule. Then everything become clear...
They don't teach that in school nowadays? How peculiar... I learned it...


http://www.hpmuseum.org/srinst.htm

[LovableAirGuns]

Calipers arnt that hard to read once you know how to do it, i got tuaght by my mums friend. At our school we learn how to use that equipment during metal tech studies.

[dewey-1]

The good old slide rule.
Went through 4 years of Electronics education using one of those.

Some people today complain about their digital calculators, just try an analog calculator for comparison!

You would be surpised at how different occupations use calipers for measurements besides machinists.

A caliper is a very good investment for any spudder.

When most people ask for ID or bore measurements, the best results are using a caliper. Not just saying it is 1/2 inch copper pipe.

[inonickname]

Normally I use digital calipers. Simply more accurate and quicker than reading verniers. I do own a pair though, and reading them properly is a useful asset.

[jackssmirkingrevenge]

You would be surpised at how different occupations use calipers for measurements besides machinists.

Definitely, I have a micrometer syringe in the lab for microlitre dispensing and when I worked for the soft drink industry, the knob we used on the mixer to adjust syrup:watrer ratio also had a vernier scale, though that was eventually replaced with a digital mixer that automatically adjusted according to its own measurement. Happy days

[velocity3x]

how would i go about measuring this inside diameter, i am assuming that i can't use a ruler .

[dewey-1]

You all should learn how to use a scale rule. Then everything become clear...
They don't teach that in school nowadays? How peculiar... I learned it...


http://www.hpmuseum.org/srinst.htm

For those interested;

Shown is: 4.220 times 1.660 = 7.000 or 7.00 divided by 1.660

Actually 4.220 times 1.660 = 7.0052 on my TI-35 calculator.
3 digit decimal is about the best resolution available on a slide rule.

What is the amount of accuracy of the slide rule here? About 99.926%


Slide rule were used by a lot of Engineers during the 1960's.
Got us to the moon did it it not?

[jrrdw]

Is there any chance of getting a piston valve (barrel sealer) machined/lathed for a 1 inch brass tee. (sorry not quite sure of the inside diameter). I would like it to seat at a low pressure (so i can use a bike pump).

Something like daniel0663's piston




EDIT: JSR how would i go about measuring this inside diameter, i am assuming that i can't use a ruler .

Thanks Jazzman

Send the piston, o-ring and the tee to be used so you can get a custom fit. I can do this for you if you wish.

[Gun Freak]

I'm thinking about having somebody machine an aluminum block for me, it is 3/8" thick, 1.5" long and 3/4" tall (approximately, it will be actually a bit more) this is a simple drawing, can I get a quote from a few people?