Jump Rope Speed Rope Handle, Extra Rigid, 608 Bearing

thingiverse

This is a basic design for a speed rope using 608zz bearings. I selected this size because they are often purchased in bulk for other projects, and I had a dozen or so extra lying around. If you don't already have these bearings, it's probably more cost-effective to buy an inexpensive speed rope rather than ordering the bearings and cable for this project. I've printed out this design, assembled it, and used it several times, although it is not my go-to jump rope. I'm not a fan of the handle size and shape, so that might be modified in a future version, but it does spin very smoothly. It has held up to multiple sessions of single and double unders lasting up to 15-20 minutes. This makes for a very smoothly spinning speed rope. If you feel confident, print out all parts at once. They have very little clearance, so you might want to increase the outer handle slightly to allow the innards to slide in while remaining snug enough to glue into place. I printed the handle parts in halves using PLA and assembled it with super glue as follows: 0. Print the required number of parts for two handles. 1. Glue the pivot halves together. 2. Slide the 608 bearings over the ends of the pivot shaft. 3. Position the pivot with bearings in the outer shell and glue the outer race of the bearings to one half of the outer handle shell 4. Glue on the other half of the handle shell 5. Repeat for the second handle. 6. Install wire rope from your preferred jump rope parts supplier (I prefer buyjumpropes.net) using the supplied stop collars. The cable eyelet on the pivot can be opened slightly if needed to accommodate thicker wire rope. If printing out all parts at once, instead of in halves, the bearings assembled on the pivot can be slid into the outer handle from the open end.