Good example of engineering drawing

[ant77]

Hi all,

I'm looking for a good sample part drawing done to Y14.5M.

Can anybody supply a drawing, or show me where I can download one?

Thanks,

ant77

 

[ant77]

In this case the holes are screw holes for mounting another part. Exact alignment of the other part is not critical, so no alignment pins are used.

 

[MechNorth]

The positional tolerance value would be set according to the needs, as would the size tolerances (the numbers in my sample drawing were just randomly selected). There are formulas to determine optimal values based on tolerance analyses. You should have enough to start with now. Good luck.

Jim Sykes, P.Eng, GDTP-S
Profile Services
CAD-Documentation-GD&T-Product Development

http://www.profileservices.ca

 

[ant77]

Thanks Jim. One last question for now. Do you use GD&T for everything you design, or just machined items? I had a quick look at the closure details on your website and noticed a different dimensioning style.

We design a lot of plastic injection moulded parts, and I was wondering if GD&T was appropriate?

Thanks.

 

[MechNorth]

I use GD&T whenever the client or manufacturing system can handle it or are interested in learning it. The thread specs on the site are part of an industry standardization project that I participate in. Unfortunately many of the participants aren't up to speed on GD&T, so they aren't sure if they're ready to make that leap yet. GD&T is, however, amazingly useful for injection molded articles as it provides an easier/better way to account for warpage allowances, etc.
If you're thinking of moving your company into GD&T, I'd suggest getting a consultant or training supplier in to talk things over and help you build your case. You can check out some of the other threads on Eng-Tips for GD&T Classes from a number of training suppliers that users recommend. I've had such discussions with Don Day at

http://www.tec-ease.com,

and Greg Hetland at

http://www.iigdt.com.

Another EngTips user, Curtis DeSaele (ragtop1955) (

http://www.GeometricSolutions.net),

provides training, and I can help with GD&T implementations as well. Good luck, and let us know how it works out.


Jim Sykes, P.Eng, GDTP-S
Profile Services
CAD-Documentation-GD&T-Product Development

http://www.profileservices.ca