Electric Skateboard Drive Gear: Kegel wheel, 33T HTD 5M-15

thingiverse

This is a drive gear for an electric skateboard, engineered specifically for use with Orangatang Kegel wheels and HTD 5M-15 belts. It features 33 teeth and attaches securely to the wheel using 5x M6x65 socket head cap screws and nyloc nuts. You can also opt for M6x70 screws or longer, which will simply protrude beyond the wheel more. To attach this gear to your wheels, you'll need to drill out the holes in the wheel hub with a 6 mm drill bit. This process is quick and effortless, requiring only minimal material removal. This drive gear should fit seamlessly over any truck hanger that has a diameter of 21 mm or less, as this is the diameter between the heads of the screws. The ID of the part itself measures 24 mm, so if necessary, you can grind the sides of the screw heads to allow them to clear a larger hanger. Please note that the photograph of the printed item showing the screws is an older version without raised flanges. I previously experienced issues with the belt riding up on the flush flanges, which led me to add some raised flanges to the model. The asymmetrical design ensures that the outboard flange can be printed without creating unnecessary support material. Print Settings: Printer Brand: Up! Printer Model: Up Mini Rafts: Yes Supports: Yes Resolution: Z layer height = 0.2 mm Infill: Full Notes: Print with Taulman3D Alloy 910 Nylon, the best engineering nylon filament available for its exceptional durability and compatibility with HTD belts (the belt teeth have a nylon facing as well). Although I haven't tested this part with other materials, I presume Nylons like taulman618 and 645 would also be suitable but less durable. I strongly advise against printing this gear in anything besides Nylon. When printing, use taulman910 at temperatures ranging from 245-250ºC, with full infill. To avoid building supports under the screw counterbores, I normally print with the curved hub interface section facing down for the main part. The small special washer is printed with the flat side down. I designed this gear by obtaining the original belt tooth profile from http://www.thingiverse.com/thing:16627 and then building it up using Solidworks and Inventor at various stages during the design process.