×
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!
  • Students Click Here

*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.

Students Click Here

Jobs

Gear Terminology Question

Gear Terminology Question

Gear Terminology Question

(OP)
I deal with European OEMs quite often and was wondering if anyone knows the difference between these three terms related to gearing specs:

Profile Shift
Profile Offset
Correction Factor

In the US we use "Profile Shift" to indicate how much the gear is to but cut under or over pitch diameter.  

RE: Gear Terminology Question

Correction factor is a ratio of the
addendum vs 1.00 times the module
addendum.  So if for example they
show 1.25x, subtract 1.00 and it shows
the .25 x the module is the profile
shift.

RE: Gear Terminology Question

as to profile offset,
they generally refer to
it as x.m where x is ratio
which you multiply times the
module and it give you the
profile shift in millimeters.

RE: Gear Terminology Question

(OP)
Thanks for your response dinjin.  I understand the reason for a profile offset, but what is the correction factor doing?

RE: Gear Terminology Question

Simply another way of defining or preference in showing how much the cutter is withheld.  Any of these definitions work.  Certain gear programs may ask for one of these instead of the others.   

RE: Gear Terminology Question

You may also see k.m which is a way of showing if the
addendum is shortened by k times the module,
Example x.m = 1.25m   k.m = .10m, then the addendum is 1.25m minus .10m equals 1.15m addendum.

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