Rubber Band Mini Blaster-32

by vanmunch, published

Rubber Band Mini Blaster-32 by vanmunch Feb 8, 2015


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69531Views 6590Downloads Found in Mechanical Toys


Simular to the Automatic Rubber Band Blaster-32, just bigger holding 72+ rubber bands. It fires ~7 rubber bands per second and can be instantly reloaded by swapping barrels.

Slow motion Video: http://youtu.be/YlqbK6L4HVo


I recommend that you first print and build the smaller Automatic Rubber Band Blaster before you build this one. The loading is the same and the assembly is very similar, but you'll have to glue the top and bottom together with plastic glue. I don't have an instructional video for this one, but the wiring/ motor & button connections are the same as in the Automatic Rubber Band Blaster video below.

Uses #32 rubber bands

Reloading: https://www.youtube.com/watch?v=m4xSol8nA3I
Assembly: https://www.youtube.com/watch?v=i-P6L7N33EY

In addition to the printed parts you will need:

1- Right Angle, Single Sided Geared Motor
1- 2xAA Battery Holder
1- Large, Red Classic Momentary On Switch
1- 7" by 3/8" Dowel
1- 2.5" by 3/8" Dowel
1- Screw Eyes 5/16" Inside Diameter
1- Screw Eyes 1/8" Inside Diameter
1- 5" Two Conductor Insulated Wire
2- 3" Single Conductor Insulated Wire
3- #6x5/8" Screws
2- #4x1" Screws
1- #2x1/4" Screw
1- 4.5' Nylon String

Use your own non printable parts or order the kit with the non printable parts online at http://www.shuttlebaylabs.com

PS This was part of a KickStarter that I did last summer:

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Love the print. Temporarily put together to test until I can get the solder gun out. Would be helpful if a hole was modeled for the eye so it had more support, and holes modeled for the wires ( unless mine is support material). This should put an end to rubber band wars in the office.

Jan 27, 2017 - Modified Jan 27, 2017

too bad it's too cumbersome to load otherwise, nice stuff :-)

Briliantly simple design! I had printed an Arcus that still needs assembly, but this one is great!

Hi Beamzer,

I think that motor is the same size, but it might not have enough torque. The motors I had specially made and are in my kits were designed to work at 3V and spin at ~50 rpms. I don't remember exactly what the torque for them is but it's about 2x what the normal 120 rpm motors have. I haven't tested the specific ones you've linked to.

Hope this helps, have fun printing and blasting!

Soooo why did I pay for this?

What are the specs on the DC motor? Gear ratio?

Comments deleted.

I wonder, could the large drum be made to allow a wrist to fit inside it? Maybe with bearings? This system seems perfect for remixing into an arm blaster!

Sounds like the Arcus. Search on Instructables.

That would be awesome!

I'm gonna try to remix the barrel with this...

I was thinking the handle could be attached to the inside of the bearings then continue to hold the motor and such near the elbow.

I am a rookie, and this is my first project, but I'll upload the file if I get something that looks functional.

Cool, ya give it a go. That idea reminds me a little bit of MegaMan:) It will be a big project, especially since the barrel will take a long time to print. So don't worry if it takes a couple of weeks and iterations. That's why the plastic is sold by the kilo, but it will be really cool! :)

Do you still sell the kit? I'd love do buy one if its available!!

Hey Blitzer418, I'm glad you like it! Yes I have the kits for sale on my website.


Please let me know if you have any trouble or questions. Have fun printing!


Hey, thanks for the quick reply! Guess I didn't even bother looking in the instructions tab for the link dumbo. I'm looking forward to printing the parts, thanks again!

this thing is a beast...

My son saw it and his jaw dropped.

Put in for a kit, it will be a nice birthday present/maker day. Z18 was cranking on the main body yesterday.

That's awesome! I was hoping that this sort of thing would happen. I'll make sure your kit gets in the afternoon mail. Have fun!

Your Web Shop is not working...?
I´m not able to order anything....?

Hey lemuba, thanks for the heads up. I think it's fixed now. When you order, let me know that it was you who helped and I'll put something extra in your order (hit you'll be able to use them with the Blaster (it's a bag of #32 rubber bands) :)


The scale is off, parts load up in slicer appear to be 1cm only. The XXL barrel seems to be correct size though, perhaps even larger.

Comments deleted.

Sorry, some parts scale are in mm and other are in inches. You just need to switch the scale from mm to inches.

Seems that slic3r expects files in metric. :(

Its really time for you guys to get with the metric system! Science!

I wonder how you could persuade folks to switch to metric? Perhaps you're printing one right now? :)

(PS I think all of the files are in metric units now.)