Thread: a question from my metal exam

Originally Posted by p38arover

I call them socket head cap screws.

I've never known them to be call Unbrako screws (although I do have two sets of genuine Unbrako allen keys I bought in 1968).

I have never known them as anything but Allen screws.

Re the original question, both the terms 'micrometer' and 'outside micrometer' are correct in the same way as describing a car as a 'Land-Rover' and a 'Land-Rover Discovery' are both correct. One just gives more info and is therefore more precise than the other.

Willem

Originally Posted by willem

I have never known them as anything but Allen screws.

Yes, I used to call them that but changed to avoid confusion with Allen head grub screws.

Originally Posted by Chucaro

........but be prepared from now on to back up your answers because he will be at your back

eeerrrr, yes......unfortunately there is a chance for that to be considered

Originally Posted by schmierer LR at singleton

hey this is a question from my metal exam i got it wrong according to the teacher but the rest of the class got it right.lets see what you say.what is this tool?

There, I thought is was a precision G clamp.

Originally Posted by foz.in.oz

There, I thought is was a precision G clamp.

yep, for precise measurement of G strings ...on.. err a guitar

Moore & Wright in Sheffield UK and Brown & Sharp in the US have been making micrometers for almost one hundred and fifty years.

They refer now to the type you have illustrated as a "Traditional Outside Micrometer". There are now digital and dual type readouts also. For a look at the whole range (Metric and Imperial) and many various types for different applications you can't go past their catalogues, Here:

Moore & Wright:
http://www.moore-and-wright.com/imag...ters_31-66.pdf

Brown & Sharp:
Micrometers - Brown & Sharpe*-*Brown & Sharpe

You could print out a few of the pages and take them to your teacher.

Bob

I have found that new engineering tradespersons dont know the correct names of many commonly used nuts bolts and fasteners. Calling socket head cap screws 'allen head" only comes about because an allen key is used to fasten or un fasten it. notice I said fasten not tighten.....they are two different things.....anyway I'm an old scholar nearing the end of my working life, who am I to know? the young tradies dont want to know anything from someone with over 40yrs of trade experience......they already know it all!

Originally Posted by bobslandies

Moore & Wright in Sheffield UK and Brown & Sharp in the US have been making micrometers for almost one hundred and fifty years.

They refer now to the type you have illustrated as a "Traditional Outside Micrometer". There are now digital and dual type readouts also. For a look at the whole range (Metric and Imperial) and many various types for different applications you can't go past their catalogues, Here:

Moore & Wright:
http://www.moore-and-wright.com/imag...ters_31-66.pdf

Brown & Sharp:
Micrometers - Brown & Sharpe*-*Brown & Sharpe

You could print out a few of the pages and take them to your teacher.

Bob

You left out L.S.Starrett and Shardlow of Sheffield. Mind you, one has to be an eccentric millionaire to buy any of those brands today. I can import and sell a wooden boxed set of six micrometers, range from 0-6" or 0-150mm, from China and sell them for less than one x 6" micrometer from any of those brands. Quite acceptable quality and accuracy too.