303 mouse scroll wheel

thingiverse

My mouse wheel suddenly lost its potency and stopped functioning properly. I replaced the encoder, but the results were disappointing, leading me to discover that the hex shaft connecting it to the encoder had become worn down. This realization prompted me to attempt creating a replacement part using 3D printing technology. After successfully printing one, I was thrilled to find out that it worked seamlessly for me; however, you may need to make some adjustments before getting it to function optimally. The 303 mouse is a small wireless optical mouse design originating from China and distributed under various brand names. Hopefully, this will prove helpful to someone in their quest for a working replacement part!