====== caster joints ======

^ Techniques infobox ^^
| Image | {{:archive:caster-joint.scad.png?240}} |
| designers | [[:user:tim|Timothy Schmidt]] |
| date | 2013 |
| vitamins |  |
| materials |  |
| transformations |  |
| lifecycles |  |
| parts | [[:frames|Frames]], [[:bolts|Bolts]], [[:nuts|Nuts]], [[:end_caps|End caps]], [[:casters|Casters]] |
| techniques | [[:bolting|Bolting]], [[:tri_joints|Tri joints]], [[:shelf_joints|Shelf joints]] |
| tools | [[:wrenches|Wrenches]] |
| git |  |
| files |  |
| suppliers |  |
| reversible | true |

[[:category:techniques|Category:Techniques]]

==== Introduction ====

Casters are one of the most widely used [[:category:parts|parts]] and come in many shapes and sizes, often with a 4-hole mounting plate.

==== Challenges ====

Mounting the caster securely through all four mounting holes near a tri-joint (which tend to be at the corners of projects, exactly where casters want to be) isn't easily accomplished.

==== Approaches ====

{{:archive:caster-joint.scad.png?600|Stronger caster joints}}

{{:archive:caster-joint-suboptimal.scad.png?600|Weaker caster joints}}

One corner configuration secures the caster at two points and centers the vertical frame member on the caster.  The other applies significant force, with the possibility of a bending moment on the caster mounting plate.

==== References ====

----
[[https://github.com/timschmidt/replimat/blob/e0bc0b855bb946bab00c75ca0d8b002ae0dc0172/wiki/caster_joints.html|Original archived page]] — revision 8317, 2021-09-25T10:01:33+00:00, by Tim.