While I (overall) agree, and found all that
intriguing*...
I have 1st hand (humiliating) experience that says "not all industries follow those tight standards".
Ever installed a brake caliper 'upside down'? I have.
At least for a Dodge Dakota, both left and right
(front) brake calipers have IDENTICAL
(marked) Part#s and casting marks.
Why? It's a quick and simple process to drill+tap the brake bleeder, etc.
location specific to ea. side.
The casting (with the integral identification) is the same so,
any 'differences' post-casting are not differentiated in the part number or any other markings.
*No Sarcasm. I'm the type of person that enjoys the 'industry insider-facing' advertisements I get on YouTube, etc.
The scale we work in is in microns: hence the "tight standards".
That's a bad idea, IMO ... not making the differences from each side CLEAR ...
Referring to my comments about bearings, and using specifically the example of the bearings i'm making since yesterday, which is 6205 series (rings FOR the bearings, actually: no longer work @ the bearing assembly section due to an arm injury, for about 11 years) and, a quick look @ the company's site shows THIS MANY variants:
- "C" - the generation (forgot that one ...)
- "2HRS" or "2Z" are shield types - some use only 1, or none even, which is why it's absent in some
- "L069" is the standard grease, but "L038" and "L100" are also very common, though there are MANY other greases
- "C3" is the slack tolerance size - C0 is the default so it's NOT used: they use "C3", "C4", others when NOT the default
- "TVH" is a cage for the spheres - it's a single cage: when it's metal, it's not named (default) UNLESS it's a "special" type, like brass for instance
- ">V" - when i worked in that section it didn't have that, so i dunno what that is for sure, but I THINK it's to differentiate "C" generation from "2nd C" generation ("C" generation fazed out somewhat recently)
Link to the 6205 page, where i took the pic from:
https://medias-at.schaeffler.com/en...rings/deep-groove-ball-bearings/6205/p/354175
SOME bearings have more variants than others: i used 6205 because it's the one i was making yesterday (from Monday to Thursday it was 6204, and it changes often).
Noticed how EVERY DIFFERENCE is reflected in the final name? THAT'S THE POINT i'm trying to make.