Dennis,
In my previous post, I recommended that you look into the cost of the materials you are considering.
Have you looked at cost? Please post what you found.
FYI, from somewhere on the web:
Coefficients.......
UMHWE = .12
ACETAL = .25
TEFLON = ????
NYLON = .35 (I was a little surprised...
I agee with insideman regarding UMHW Polyethylene. Look at pricing of Polyethylene vs teflon or delrin. (note 'delrin' is the tradename for Dupont 'Acetal')
Once you look into cost of Polyethylene, you'll be compelled to make it work.
1. BEWARE of 'SAG' !! with any plastic system such as you...
Major diameter, Minor Diameter, location (and orientation), are all that I've ever used, and that usually gets the job done for me without any calls from the machine shop - I too was once 'skeptical' like you about 'will the machinist be able to do', but I've since found out they've usually been...
Dayton-Rogers publishes a nice sheetmetal design guide.
Their website is:
http://www.sihope.com/projects/registry/dayton/how.htm
Unfortunately, the links on that page are not working, but lists the topics within the design guide pictured.
Their address & phone number are posted at the bottom...
One more tool that may be of use is 'Babelfish', a digital translation tool (not a 'dictionary') that translates text between various languages. Some of the translations are very literal, but in general babelfish works at least good enough that you can ferret out the intent of the text.
Click...
I once worked with a some visiting Japanese Engineers. The level of their knowledge of English was what they had learned in high school. A great source of 'definitions' for these Engineers was a McMaster-Carr catalogue(www.mcmaster.com or 1-732-329-3200) which contains over 3000 pages of...
