ISO Pen

the ISO pen. This pen is unlike anything ever before. The cartridge is able to rotate on bearings and ride up and down the action. The cartridge is “fired” with opposing magnets, which is also a first in the pen industry. These magnets provide a really reliable action with less friction and wear than a spring. This pen does not lock out, so it will feel different. It could be quite functional for writing in a car or small plane, as bumps and wind will not cause you to punch a hole in what you are writing on. The photos will provide basic assembly info. 

Hardware:

2x 3x7x3 mm bearings

1x m3x10 bolt

10 m3 locknut

m2x4 screw

m3x16 pin 

any 3mmx100mm ink cartridge (you will need to cut one down)

1x 8x3mm magnet

1x 12x3mm magnet

Notes:

When assembling, make sure to orient the magnets so that they repel each other. Some super glue might be needed to attach the rear bearing to the back of the cartridge where the screw is. If you install the screw, you will need to add some small holes just below it in the cartridge for air to get in. I have personally printed the cartridge floater and chassis cap out of a glass fiber nylon, and the main chassis and cartridge cap out of PLA. Everything can be printed out of PLA, but the nylon adds a bit of durability, and the cartridge floater has a smoother action because of the material properties of nylon. 

What's next?

I would love to make one of the world's strongest pens by having the main chassis be machined out of tool steel S7 or something even stronger. I would also love feedback on the current design and functionality of the pen. I am interested in selling the design to a company who would be interested in producing it, or selling it small scale myself.