Rod and hollow stud

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Rod and hollow stud

"male" connection Rod
"female" connection Center of Hollow Stud
File:Rod and hollow stud Female CT.png
Female part: Center of Hollow Stud
Continuous or Discrete? Continuous
Degrees Of Freedom 1 Rotational and 1 Translational
Friction? Yes
Fan Developed? Maybe

Rod and Hollow Stud is a connection between a Rod System rod (or 3 LDU Tubing or a Light Sabre Blade and the top of a hollow stud (as found on Technic beams, Travis bricks, the side stud of a washing machine brick half-4070.png, the top stud of a jumper plate half-3794.png the top studs of brick hinges, etc). Note that some hollow studs are hollow all the way through (newer 1x1 rounds) while others stop at the brick surface (technic beams for example)

The connection is effected by plugging the end of the rod into the hollow stud. Once plugged in, it's a friction fit but you can place the rod at any rotation desired.

Note that for this connection to work (when not used with a all the way through hollow stud), the end of the rod has to be squared off, so not all rod system rod parts will work, for example the Rod System Antenna half-3957.png will not since it has a rounded end that is too round for the sides of the hollow stud to grip.

Note also that the protrusions on the bottom of 1xN plates and Tiles are the same size as Rod System Rods allowing this to work.

Note that some parts as 1x1 round brick or 2x2x2 cones have seen their solid stud changed into hollow stud (in 1979 and 1984, respectively). It is speculated that this was done to reduce the choking hazard should a child swallow a one of these parts and have it lodged in an airway.

Note also that rod and hollow stud is a common way to reinforce certain types of structures made of 1x1 rounds (for example trees, or traffic signals), which use a long tubing run through several 1x1 rounds stacked. The tubing is not visible but adds a great deal of structural strength compared to just the clutch power of the 1x1 round Stud and Tube connection.

The connection allows rotation (with friction) around the axis drawn through center of the stud and rod, as well as translation (with friction) along that same axis. The friction is typically relatively high compared to say Clip and Rod.

Note that Rod and Technic Axlehole can be thought to be a degenerate or variant form of this connection.


Note:This is a Connection System article and should be illustrated with pictures or renderings of the connection type, details, and should give dimensions in LDU of the key parts of the connection where that makes sense.

Connection System articles use the ConnectionTypeBox template, comments welcomed on whether all the necessary information is there, see its talk page for more usage info or to comment.



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