KRUPS GVX2 replacement bevel gear

thingiverse

I recently encountered a problem with my KRUPS GVX2 coffee grinder's coarseness selector knob, which KRUPS refers to as the "ground coffee finesse selector" on the side. The knob stopped rotating entirely. After disassembling the grinder, I discovered that several teeth were broken off the smaller white bevel gear. I designed and printed a new gear assembly, making it easier to re-install and calibrate by not including the original stop limit for the knob's rotation. To determine if this is your problem, you need to disassemble the grinder. Here are the steps: - Rotate the removable upper burr counter-clockwise to unlock and remove. - Remove the "number of cups selector" knob from the front using pliers. - Carefully pry out the "ground coffee finesse selector" knob from the side. Note that there is a small white cylinder and spring underneath this knob. Don't lose them. - Remove the clear coffee-bean hopper lid and ground coffee holder bin. - The next step involves removing the grinder's outer shell by turning it upside down and using a screwdriver to carefully pry it away from the inner shell at the 4 slots around the base. The outer shell will drop down a bit, allowing you to push it off. - Remove the 2 screws that hold the lower burr assembly and rotate it out of the way while being careful not to break the delicate switch assembly connected to the red wires. - Inspect the bevel gear; if the small bevel gear is missing teeth, you can print and replace it. The replacement part has a bracket and 4 screws that hold it in place. For more detailed disassembly instructions with photos, refer to this link: http://onthebackside.blogspot.com/2008/05/krups-gvx2-coffee-grinder.html After printing and gluing the replacement bevel gear and shaft together, re-assemble the grinder. I recommend not fully installing the "ground coffee finesse selector" knob until you grind some coffee and determine where you want the final knob position to be. To maximize the strength of the part, I broke it into two pieces and printed in PETG at .2mm layer height. The bevel gear was printed flat on the print bed with no support and 100% infill. The shaft was printed horizontal to the print bed with support and 100% infill. CA glue worked for me when using PETG-printed parts. If you have any questions or suggestions, let me know.