Interesting drawing

[3DDave]

Concentricity? Check.
Concentricity to a feature without a form tolerance? Check-a-roo.
Trailing zeros on metric dimensions? Check.
Trailing digits to trigger title-block tolerances? Not disappointed.
Spelling errors? Absolutely.

I'd love to see a cleaner copy.

https://i.kinja-img.com/gawker-medi...0,w_1315/40b2717f7a5b17917929887934e9bf3a.jpg

 

[Burunduk]

I haven't been able to detect the reference to a standard, but the reading direction of the dimensions is typical to ISO and disallowed in ASME Y14.5.
If this is an ISO drawing, Concentricity is a valid callout.
The company is British, so most likely it's ISO or the ISO based BS (British Standard).

 

[Wuzhee]

It's 3rd angle projection, and from 2014. Who knows what were the in-house adaptaion of whatever standard they use.

 

[Wuzhee]

I'd love to see a cleaner copy.

As you wish.
Also attached the Caterham Front upright.

https://files.engineering.com/getfi...9&file=Caterham-CT05-F1-Car-Front-Upright.jpg

https://files.engineering.com/getfi...9e&file=Caterham-CT05-F1-Car-Wheel-Nut-LH.jpg

 

[Steven_D_P]

@3DDave
There's an email of the designer on the drawings. You can tell him how his drawing are absolute crap and that your car is faster 0-60.

 

[greenimi]

@3DDave
There's an email of the designer on the drawings. You can tell him how his drawing are absolute crap and that your car is faster 0-60.

Steven,
No need to. The natural selection take its course.

Collapse Of F1 Team Leaves Caterham Cars $18.7 Million In The Red

Why did Caterham leave F1?
With insufficient revenue coming into Caterham Sports, Mr Cojocar put the company into administration, the British equivalent of Chapter 11 bankruptcy

 

[3DDave]

If only they had followed the ruuullllessss!

It was the reverse point - that some of the hardest driven creators of these drawings and parts did not find value in either ISO or ASME GPS standards, but still made it to race day. Whether their ability to generate advertising sponsors was tied to this is anyone's guess. Like, would Red Bull not put a sticker on a car and $1M in the coffers for inappropriate drawings? Doubt it.

Perhaps, properly specified, this would be a $5 part. /s

 

[Burunduk]

It was the reverse point - that some of the hardest driven creators of these drawings and parts did not find value in either ISO or ASME GPS standards, but still made it to race day

So is it a good drawing?

 

[3DDave]

It's a learning opportunity.

 

[Burunduk]

It's a typical drawing that happens when the designer is mainly concerned about giving all the "necessary" dimensions, most of which are subject to title block tolerances. What strikes out in this type of drawing is the huge total amount of requirements for measurement and reporting, yet with the variation limits on many features remaining under-defined.

 

[greenimi]

Burunduk,

What strikes out in this type of drawing is the huge total amount of requirements for measurement and reporting,........

Just for my own education: how do you know about which dimension is to be reported and which not? You said "the huge amount of requirements for measurement and reporting". Which one are subject to measurement and which one are to reporting and which one are to both?

 

[Burunduk]

greenimi,
In my practice, all tolerance requirements and toleranced dimensions (non-basic, non-reference, non-stock dimensions), are inspected and reported, at least at FAI.

 

[Wuzhee]

If it fits, can be torqued to 3000+ Nm, and they don't lose the wheel, they don't need ± or gd&t or whatever on the drawing. Imagine slapping three standards and dozen callouts and making it a 150€ part while it costs only 5€ to make from this drawing.

 

[greenimi]

all tolerance requirements and toleranced dimensions (non-basic, non-reference, non-stock dimensions), are inspected and reported,

Is this a company/organization internal practice or a standard (ISO, ASME, automotive, ANSI/ ASQC, etc)?

 

[Burunduk]

greenimi,
First Article Inspection (FAI) is required by quality standards such as ISO 9001. It's common to inspect every single tolerance specification (including for dimensions that get their tolerance from the title block) at FAI, and it's certainly what they do in my company. But whether it's an absolute requirement by the applicable standards, is a quality question worth investigating. I don't have an answer for that, and I hope someone else here has.

 

[Qcprick63]

That's rigth ! hahahah