{{Parts infobox
|image           = Axle.scad.png
|designers       = [[User:Tim|Timothy Schmidt]]
|date            = 2019
|vitamins        = 
|materials       = 
|transformations = 
|lifecycles      = 
|tools           = [[Metal lathes]]
|parts           = 
|techniques      = 
|files           = 
|suppliers       = 
|git             = 
}}

[[Category:Parts]]
[[Category:Motion parts]]

=Introduction=
Keyed shafts rotate inside [[axial bearings]] to transmit power.  [[Keys]] are fit into keyways to fix [[wheel hubs]], [[gears]], [[sprockets]], and other accessories to keyed shafts.

=Challenges=
Power transmission often requires rotating shafts with sprockets, brakes, pulleys, gears, wheels, and many other types of devices attached in unique configurations.

=Approaches=
A round steel shaft with a [[https://en.wikipedia.org/wiki/Key_(engineering)|keyway]] allows for similarly keyed interchangeable components to be positioned securely along it's entire length.  Such a shaft can be manfactured from round stock with as little as a [[https://en.wikipedia.org/wiki/Broaching_(metalworking)|broach]] and a hammer.
  * [[https://www.surpluscenter.com/Power-Transmission/Shafting/Keyed-Shafting/1-x-36-Keyed-Shafting-1-2982-100-3.axd|1"x36" keyed shaft]]
  * [[https://www.surpluscenter.com/Power-Transmission/Shafting/Keyed-Shafting/1-x-72-Keyed-Shafting-1-2982-100-6.axd|1"x72" keyed shaft]]
<gallery>
Rear wheel assembly.jpg|
</gallery>

=Development targets=
======indexed shafts======
  * [[https://www.couplemate.com.au/trailer-caravan-axles/40-square-axles/40mm-square-axle/|40mm square axle]]

======splined shafts======
ISO 500-3 for PTO splines<br>
ISO 5673-1 is a good start for other splines.<br>
ANSI B92.1<br>
DIN 5480 & ISO 4156<br>
JIS B1603<br>



=References=
  * [[https://en.wikipedia.org/wiki/Axle|Wikipedia: Axle]]
  * [[https://en.wikipedia.org/wiki/Simple_machine|Wikipedia: Simple machine]]
  * [[https://en.wikipedia.org/wiki/Key_(engineering)|Key (engineering)]]
<youtube>KuA8Zjmq2Bk</youtube>