shop-talk
[Top] [All Lists]

Re: Engineering Question Regarding Splined Shafts

To: <shop-talk@autox.team.net>
Subject: Re: Engineering Question Regarding Splined Shafts
From: "Nolan Penney" <npenney@mde.state.md.us>
Date: Tue, 14 Oct 2003 08:47:20 -0400
I have engineering manuals that state absolutely that coarse or fine
splines are the strongest, depending on which manual you happen to be
reading.  All complete with formulas.

Here's my take on it based on observation and a smidge of experience.

First and foremost, heavy industrial equipment will use coarse splines.
 You will not find fine splines on bulldozer sprockets, ship propellers,
tractor PTO's, jack hammer shanks or other heavy devices.

Fine splines are inherently short.  As such, it takes far less wear on
them to result in loss of engagement.  

Don't focus on the root of the splines.  For each root is interfaced
with a tip.  Focus instead midway along the splines.  This is where the
forces are maximized and where failures will result.

In any spline fitting, due to machining tolerances, only a few splines
are actually taking the load.  If those splines are weak, they will
deform and even fracture.  

Fine splines will result in a more precise mounting then coarse
splines.




-----------------------------------------------------
The information contained in this communication may be confidential, is 
intended only for the use of the recipient named above, and may be legally 
privileged.
If the reader of this message is not the intended recipient, you are hereby 
notified that any dissemination, distribution, or copying of this 
communication, or any of its contents, is strictly prohibited.
If you have received this communication in error, please re-send this 
communication to the sender and delete the original message and any copy of it 
from your computer system. Thank you. 
-----------------------------------------------------
<<<<GWIASIG 0.07>>>>





<Prev in Thread] Current Thread [Next in Thread>