Guide to Mysterious Engineering Symbols

7 comments

Rate

Anonymous Poster	Guide to Mysterious Engineering Symbols 02/01/2008 8:06 AM
	As I read documentation of a technical nature I often come across references and symbols with which I am not familiar. For example, in reference to shaft tolerances the symbols "dn<50000" and "C/P>10". Am looking for an engineering reference (glossary of terms) that would help in understanding a broad spectrum of terms. Would appreciate pointing me to some references. Thank you.
	Reply

Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

qaqcpipeman Guru Join Date: Sep 2006 Location: Western Pennsylvania, USA Posts: 761 Good Answers: 9	#1 Re: Guide to Mysterious Engineering Symbols 02/02/2008 7:17 AM
	I can't help you here, but I must see the answers of our peers. I have been having enough trouble lately just translating from other languages to English
	Reply Score 1 for Good Answer

MOBI Guru Join Date: Aug 2007 Location: Australia Posts: 1630 Good Answers: 20	#2 Re: Guide to Mysterious Engineering Symbols 02/02/2008 11:53 AM
	Are these shaft tolerances related to bearing fits, at this point in time I have some hazy idea that this maybe the case and related to shaft speeds also. __________________ TO BE. or NOT TO BE. That is the question!! The Bard
	Reply

my2001 Member Join Date: Oct 2007 Posts: 6	#3 In reply to #2 Re: Guide to Mysterious Engineering Symbols 02/04/2008 9:24 AM
	It is indeed. Your hazy idea is precisely the case - sorry I wasn't more specific. If you have some reference to a glossary of symbols that would be excellent.
	Reply

MOBI Guru Join Date: Aug 2007 Location: Australia Posts: 1630 Good Answers: 20	#4 In reply to #3 Re: Guide to Mysterious Engineering Symbols 02/04/2008 9:36 AM
	Can't promise anything, but will see what I can come up with over the next few days. __________________ TO BE. or NOT TO BE. That is the question!! The Bard
	Reply

Q Commentator Join Date: Jun 2007 Location: Pacific Northwest Posts: 57	#5 Re: Guide to Mysterious Engineering Symbols 02/04/2008 11:29 AM
	Another hazy idea. The "C/P>10" looks like some kind of hybrid surface texture parameter symbol dealing with bearing ratios. I'm also interested in what others say. __________________ Sucess is going from failure to failure without loss of enthusiasm... Winston Churchill
	Reply

logix101 Power-User Join Date: Jan 2008 Posts: 203 Good Answers: 2	#6 In reply to #5 Re: Guide to Mysterious Engineering Symbols 02/11/2008 2:23 PM
	I got this answer from my tool and die guy I hope this helps! If it is a spindle shaft the DN is a surface speed rating. This is calculated by multipling the od (bearing journal) in millimeters by the service speed (rpm) i.e. 40mm x 1000rpm = 40000dn . This shaft is less than 50000dn. It is simply a easy version of surface speed without PI. Widely used in bearing speeds. __________________ The more complex the mind, the greater the need for the simplicity of play... If you think you can or think you can't you'll always be right
	Reply

my2001 Member Join Date: Oct 2007 Posts: 6	#7 In reply to #6 Re: Guide to Mysterious Engineering Symbols 02/11/2008 4:18 PM
	Most helpful and precisely what I needed. Thanks!
	Reply

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!

Copy to Clipboard

logix101 (1); MOBI (2); my2001 (2); Q (1); qaqcpipeman (1)

	Got Something to Say?
	Ask a Question Start a Discussion

	Aerospace
	BioMech & BioMed
	Chemical & Material Science
	Civil Engineering
	Communications & Electronics
	Education and Engineering Careers
	Electrical Engineering
	General Discussion
	Instrumentation
	Manufacturing
	Mechanical Engineering
	New Technologies & Research
	Software & Programming
	Sustainable Engineering
	Transportation

	Site Directories
	Forum Directory Blog Directory User Group Directory RSS Feeds CR4 Rules of Conduct CR4 FAQ Site Glossary Who's Online (50 right now) Show Members