Modified RIT Arm Parts

thingiverse

These parts were tailored for my use in creating the E-nable RIT 3D printed prosthetic arm. The tricep cuff was modified to address a cracking issue that occurred after a brief period of use by my first recipient. The forearm cup was redesigned to reduce weight and create a more generic, silicone insert-friendly internal shape. I crafted the fingers with a look that is visually compatible with the Cyborg Beast fingers. These parts are designed for RIT arm v 0.43, but some parts may also be suitable for newer versions. These files do not include all necessary components to assemble a complete arm; they only provide the modified parts. You can find the original RIT files at: https://www.youmagine.com/designs/rit-e-nable-arm-v0-43#!design-information. Careful implementation of sizing methods may be required, which could involve consulting with a medical professional. I added left-hand versions of tricep cuff, forearm receiver, and palm on 03/08/2015. I then updated the tricep cuff to V2 on 04/18/2015, addressing a newly reported cracking issue. To ensure proper fitment, be aware that scaling these parts may lead to fitment problems in holes using Chicago style screws, especially in the areas where finger and thumb proxes attach to the palm. The problem could result in oversize or undersized holes depending on the scaling factor. You can enlarge slightly undersized holes by carefully drilling through them with a drill bit of suitable size. I discovered that a 13/64 (0.203") drill bit works effectively, as long as you don't thin out the area around the hole. If you have SolidWorks capabilities, consider using the files available at: http://www.thingiverse.com/thing:604380