This group set out to create an open-source adjustable bit brace as a tool to lower the barrier to entry for smaller individuals looking to pick up tools and work on DIY projects. The brace is designed to highlight 3D printed parts, as well as components that can be fabricated at home by an experienced maker. The design uses standard adjustment mechanisms such as button clips and bolts to bring the bit brace from full size down to 2/3 scale in seconds. The device is advised by engineering models, FEA analysis, stiffness/strength targets, and destructive testing protocols to create a brace that satisfies user needs and predefined performance goals. Several parts were created in an iterative process to determine the best 3D printed design, material, and integration method. The final brace underwent validation proof load testing to ensure that assembly-level analysis was correct and that the brace was safe for operation. With the final addition of steel gussets to the 3D printed components, the brace now exceeds the predetermined strength requirements for functionality. Finally, the brace was used to drill holes into wood beams at several size configurations including the largest and smallest to ensure that functionality and tactile feedback were preserved.
Mechanical Engineering Design Project (MEMS 411)
Levy, Alex; Dutton, Alex; Luberda, Daniel; and Murphy, Aidan, "MEMS 411: The Adjustable Bit Brace" (2021). Mechanical Engineering Design Project Class. 150.