====== keyed shafts ======

^ Parts infobox ^^
| Image | {{:archive:axle.scad.png?240}} |
| designers | [[:user:tim|Timothy Schmidt]] |
| date | 2019 |
| vitamins |  |
| materials |  |
| transformations |  |
| lifecycles |  |
| tools | [[:metal_lathes|Metal lathes]] |
| parts |  |
| techniques |  |
| files |  |
| suppliers |  |
| git |  |

[[:category:parts|Category:Parts]]

[[:category:motion_parts|Category:Motion parts]]

==== Introduction ====

Keyed shafts rotate inside [[:axial_bearings|axial bearings]] to transmit power.  [[:keys|Keys]] are fit into keyways to fix [[:wheel_hubs|wheel hubs]], [[:gears|gears]], [[:sprockets|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]]

{{:archive:rear_wheel_assembly.jpg?600}}

==== 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\\

ISO 5673-1 is a good start for other splines.\\

ANSI B92.1\\

DIN 5480 & ISO 4156\\

JIS B1603\\

==== 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)]]

[[https://www.youtube.com/watch?v=KuA8Zjmq2Bk|Watch video on YouTube]]

----
[[https://github.com/timschmidt/replimat/blob/e0bc0b855bb946bab00c75ca0d8b002ae0dc0172/wiki/keyed_shafts.html|Original archived page]] — revision 9483, 2022-04-17T18:59:00+00:00, by Tim.