×
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

JIS involute spline (external) help

JIS involute spline (external) help

JIS involute spline (external) help

(OP)
Hi everyone.  I am a new member here, and wow what a great resource this site is.

Need some help.  I need to specify a JIS external spline for quoting a small diameter drive shaft (outdoor power equipment).  The shaft must interface with a Japanese gear case, which has the following for required external splines (to mate with the internal splines of the gear case):

Spline Std:  JIS
7mm x 7 teeth x .75mm module
shifted modules = +.967mm
profile = low teeth
PA = 20 deg.
pitch diam = 5.25
measurement over pins = 7.926-.087/-.144 (1.40 mm pin)

The above info is from the gear case supplier.  I am trying to get more detailed info from them (e.g. recommended fit class, recommended hardness, etc.).  But in the mean time I need to release a drive shaft drawing for quotation.  I would like to draw the splines with a simple representation.

* What would the "root" diameter be?
* What would the "outer" diameter be?

I did search and saw that there is downloadable programs for calculating the detailed dimensions of the tooth profile... however my IT dept will not allow outside programs.

Thanks in advance... this is my first experience working on a detailed level with splines.  Also:

* What is meaning/definition of the term module?
* What does the shifted module mean?  I read in a previous post that this is a modification to the involute profile of the tooth... but what is changed by this value?

RE: JIS involute spline (external) help

search on metric spline on this website and there
should be enough examples to answer most of you
questions.

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