×
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

Hexagon Shaft-Hub-Connection

Hexagon Shaft-Hub-Connection

Hexagon Shaft-Hub-Connection

(OP)
Hello all,

I want to compare several shaft-hub-connections regarding transmissible torque. The failure criterion should be the max. allowable surface pressure.
For lots of shaft-hub-connections you can find appropriate formulas, for example for spline shaft connections:
T=h*L*p,max*r*phi*z
with T=torque, h=spline height, L=hub length, p,max=max. allowable surface pressure, r=mean radius, phi=contact area ratio, z=number of splines

Is there a similar formula for hexagon connections? Any reliable source concerning this topic would be great, too!

RE: Hexagon Shaft-Hub-Connection

I think the equation you've posted for splined shafts can be adapted to a hexagon if you just make a FBD of the spline cross section and the dimensions in the equation, then relate the corresponding dimensions for the hex shaft. Just bear in mind that the surfaces in contact are not normal to the net contact forces, so your equation will have an extra trig term, like " T=(...)*sin(30) " or something similar.

STF

RE: Hexagon Shaft-Hub-Connection

You are asking a question that can get very complicated. The contact stress levels in your hex profile shaft/hub coupling can vary greatly based on factors like precision/alignment of the mating parts under loaded conditions. If no relative motion is required at the connection, it is usually best to have an interference fit between the mating parts.

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