Dimensional Inspection - Symbology cheat sheet

normzone

Trusted Information Resource
#1
Hello all -

I've been a free agent for a couple of months, and Tuesday 20180501 I'm interviewing with a nearby machine shop for an inspection position.

I've been inactive in that area for long enough that if I'm hired it will be because they like me, not because of my knowledge. I'll get out my Machinery Handbook and look up symbology and see if there's a cheat sheet in there I can copy.

Any other suggestions for pocket guides to the game? I've only brushed up against GD&T a few times, and I own the textbook but have never been compelled to learn it. Time to study up now, but it's a bit late for this interview.

Sigh - I've painted myself into a professional corner. Oh well, courage, carry on, et al ....

Thanks all -
 
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Stijloor

Staff member
Super Moderator
#2
Hello all -

I've been a free agent for a couple of months, and Tuesday 20180501 I'm interviewing with a nearby machine shop for an inspection position.

I've been inactive in that area for long enough that if I'm hired it will be because they like me, not because of my knowledge. I'll get out my Machinery Handbook and look up symbology and see if there's a cheat sheet in there I can copy.

Any other suggestions for pocket guides to the game? I've only brushed up against GD&T a few times, and I own the textbook but have never been compelled to learn it. Time to study up now, but it's a bit late for this interview.

Sigh - I've painted myself into a professional corner. Oh well, courage, carry on, et al ....

Thanks all -
Here is a good source of GD&T information:

GD&T Symbols, GD&T Modifiers
 

Wes Bucey

Prophet of Profit
#3
Jan's chart is a good start. An important part of the task will be what kind of work the machine shop turns out and the the kind of instrumentation available.

When I agreed to a partnership in a machining company as part of a re-engineering turnaround, the instrumentation available then would have made my great uncle feel right at home in his WWII era machine shop. By 1995, after our transformation, when he was in his 80s and retired for 25 years, he came to visit and thought our CMM and super laser micrometer (capable of measuring 50 millionths of an inch) were out of a SYFY film and completely blew him away. The computer controlled turning and machining centers which produced work requiring such inspection equipment were similarly mind boggling to him.

My point being there are still a lot of shops using 20 and 30 year old technology making commonplace products and a few (not many) who are at the cutting (pun intended) edge and making super sophisticated components for aerospace and medical devices.
 
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