Mechanical Design

I am a mechanical designer. I worked for almost thirty five years at Optech Incorporated, now Teledyne Optech. Now, I am on a contract with Christie Digital.

My resume in PDF format.

My resume in HTML format.

I am a member of OACETT. I am a Certified Engineering Technologist, specializing in mechanical design. As of April 2017, I am OACETT's Toronto West Chapter Vice Chair.

Articles by me

[Get Adobe Acrobat here!]

Design For Manufacture and Assembly
These are my notes on the subject. Shoddy design is a non-value added cost. Let's do it properly! Adobe Acrobat format.
Calculating Locational Tolerances
As a mechanical designer, I prepare fabrication drawings. I apply a lot of dimensions to holes, and I have to work out tolerances. Finally, I sat down and did the math. If you prepare or check mechanical drawings, this article should be useful. Adobe Acrobat format.
Positional Tolerances
Positional tolerances as per ASME Y14.5, and some ISO specification, are supposed to provide 50% more allowance, compared to ± tolerances. Do they? Gnuplot and latex2html are not working well together, so this is available only in PDF. Also, note how the scatter diagrams are generated randomly, every time this website is updated.
Parametric Threads in SolidWorks
You can model a threaded assembly and create fabrication drawings of the parts, and make it so that all the thread specifications update. It does have to be a metric thread. Let me show you how.

External Engineering Websites

Engineering Tips
Engineering Tips This is an engineering forum I found on the internet. You can log in and ask technical questions. You can be helpful and answer some of the questions if you know what you are talking about.
Here is a very useful database on engineering materials.
Engineering and Technology
This contains all sorts of articles on engineering related topics, maintained by Dr James B. Calvert. I still have an old slide rule lying around somewhere.
Tips on Designing Cost Effective Machined Parts
Most of my stuff gets machined. I do not agree with everything in the article, but most of it is good to know.
All sorts of engineering stuff.
All sorts of more engineering stuff thank to the late Roy Beardmore. The website is being kept up for the moment.


[Never be without your Machinery's Handbook.] Never be caught without your Machinery's Handbook. You never know when you have to flatten out a panel for dovetailing.

Next time, I buy the large print version, which weighs more.

Last modified: 2018/01/19 by Howard Gibson. Valid W3C XHTML 1