INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Jobs

Question about AGMA standard

Question about AGMA standard

(OP)
hello
i'm sizing a couple of helical gears and i have a question about this image: . N are about number of teeth and P_d is transverse diametral pitch
i don't think it is correct because the result is too little. I think the correct formula is C=(D+d)/2, with "d and D" pitch diameters.

the second question is about the word "manufactured". in the handbook there is the distinction between "manufactured center distance C" and "operating center distance C_o". i don't have any info about C_o, neither in the handbook. how can i assess it?

RE: Question about AGMA standard

Hello,

i don't have the respective AGMA paper in my hand, but imo the above formulas would be correct if Pd was proportional to 1/modulus. So looking up in wikipedia i found:

So prhaps there's again a metric vs. imperial "mantrap", hopefully you don't design spaceships to Mars?... winky smile
For the other question, there must be a formula somewhere, else there's no sense t make up the difference. Also, there's a thread here on eng-tips: http://www.eng-tips.com/viewthread.cfm?qid=146377.

Regards

Roland Heilmann
Lpz FRG

RE: Question about AGMA standard

I think, you read that wrong. Since it is a capital "P", it means diametral pitch and not circular pitch.

RE: Question about AGMA standard

Can you provide the AGMA spec number the equations came from? I took a quick look at AGMA 917-B97 table 1 which lists "C" as operating center distance (inches).

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close