Screw Threads 2

[MechCT]

Hi I'm wondering what the class variable refers to in an ANSI Unified Screw Thread callout... Anyone know?

For instance, a 0-80UNF-2A differs from a 0-80UNF-3A in what way?

Thanks!

 

[ctopher]

http://www.sizes.com/tools/thread_screw.htm

Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP3.1 / PDMWorks 05
ctopher's home site (updated 06-21-05)
FAQ559-1100
FAQ559-716

 

[MechCT]

Yea, I saw that site already ctopher, when I did a google search on the subject. Unfortunetly, it doesn't tell me what the different classes are for.

 

[ctopher]

It is tolerances

http://www.newsontool.com/05_a05.html

Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP3.1 / PDMWorks 05
ctopher's home site (updated 06-21-05)
FAQ559-1100
FAQ559-716

 

[MechCT]

Got it, thanks.