Hey! This thing is still a Work in Progress. Files, instructions, and other stuff might change!

Springamathing 1.0

by Landru, published

Springamathing 1.0 by Landru Oct 10, 2011

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Springamathing 1.0 by Landru is licensed under the GNU - GPL license.

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This is a spring designed for 3d printing.

Watch the video to see it in action!

The more you scale the spring, the smaller the spring constant.

Increasing your filament width increases the spring constant.

The spring can be used in tension or compression, but it must be fairly short with comparatively thick filament width to be used in compression.

It can be made extremely flexible and it is very fun to play with.

It's form was discovered by accident, as it was originally auto generated support for the middle of a hollow cylinder.

I'm still perfecting the design but it works quite well in it's current state.

I will be uploading different sizes (and source files shortly) over the next few days.

The spring was prototyped on a Fablicator.


Print completely hollow, no shells. Just turn fill OFF.

Adjusting your extruded width will alter the spring properties. Also, scaling the spring will alter it's properties.

Have fun.

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If you are using Cura set bottom/top thickness to "0" and Fill density to "0". That will make the object hollow.

I dont know how to use this ?

Printed it out with settings as stated, printed a solid bar basically..went to springymathing and it snapped into five pieces. Wooo. :( Don't know why your model has a large bar of solid space. Going to modify the .sldprt to represent your printed version.

Could you send me the improved file? I had the same problem.

I've got the same issue. It seems like the 5th picture shows what I have but with the top and bottom missing. What am I doing wrong?

Found it in a petri dish and were going to throw it out you say? :) Actually I'm occasionally surprised at how much people pass over my snazzy printed items to play with and dissassemble the scraps.

Could this be injection molded?

I don't see why not. There are no undercuts and it would be easy enough to add some draft.

Might run into a tad bit of trouble with the small wall thickness. Or not. Not my area of expertise.

It depends on the type of plastic you use. Some plastics are quite viscous once melted, in particular, high strength glass-filled plastics. If it doesn't flow well it won't completely fill a cavity and you'll get what is known as a short fill. More runny plastics flow better (obviously) but they have more of a tendency to flash (get forced out between the joins of the moulding). Its swings and roundabouts, really. The world of injection moulding can be complicated.

Nice spring, but I'm more interested in the printer you made it on.... how'd you come across one ;-)

most likely, he has a makerbot or reprap...

If stretched does it pull to get back to it's shape or is it just flexible? Could it be used as a kinetic energy store in a wind up motor?

As long as it is not stretched too far, it acts just like a normal spring, though admittedly has a very low spring constant. I think PLA would work better for energy storage as it has a much higher elastic modulus.

looks like a lot of fun :)