Reviving Typewriters with Custom 3D-Printed Feet

Published on 21 March 2024 at 17:11

Typewriters often bear the wear and tear of time, The rubber parts are many times worn out, with their feet being no exception. Whether the rubber has crumbled away or turned into a sticky mess, the need for good typewriter feet is undeniable.

Replacement Typewriter feet

For me, this necessity sparked a journey into crafting custom typewriter feet. Faced with the frustration of machines sliding around during use, risking scratches on tables and desks, the quest for a solution began.

The journey started in late 2021, delving into the world of 3D printing. Initial attempts with Shore A98 TPU, a type of flexible filament, proved challenging. The material was too rigid, resulting in experimentation with low infill percentages.

However, this led to inconsistent results, with the feet varying in flexibility. While the harder TPU prevented scratches, it lacked the necessary grip.

Shown here are two examples of my early designs. The low infill density can clearly be seen.

Shore A98 typewriter feet with low infil density

Persistence paid off as I refined their process. I found that the feet would be much better if they were printed using Shore A70 TPU. Though I had to do some major upgrades to my printer, I eventually was able to get much better results. The optimal balance of flexibility and durability, mirror the properties of original typewriter feet.

Shore A70 TPU typewriter feet with 100% infil density
Replacement typewriter feet flexibility

Above are a couple examples of the Shore A70 feet. As can be seen, they as good as completely solid, which costs more material, but resultis in very uniform flexibility.

The importance of quality typewriter feet is vividly demonstrated in this video showcasing the stability and functionality they provide. Grip is very hard to portray without experiencing it yourself, so please believe me if I say that when tested, the difference between real rubber, and my TPU printed feet was barely, to not even noticeable at all!

 know that printed feet won't appeal to everyone. This was also very high on the list when researching suitable materials. I was able to find a TPU that is easily sanded. The option to sand the feet might add to their appeal, as it gives the feet a more authentic feel. Sanding not only achieves a duller finish akin to original rubber but also diminishes the visibility of print lines, enhancing the overall aesthetic.

In conclusion, the journey from frustration to innovation exemplifies the passion of typewriter enthusiasts in preserving these mechanical marvels. Through custom 3D-printed feet, typewriters are rejuvenated, ensuring they continue to grace desks and inspire creativity for generations to come.

Please visit my shop for all my typewriter feet and other rubber parts! 


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