Knurled Tri-Spinner Fidget Widget / Triple Bearing Spinner

thingiverse

I love creating tri-spinners for people and I've made many of them already. Unfortunately, using 4,608 bearings for each spinner with only three of them acting as counterweights is not ideal to me. I discovered that half-inch nuts have a similar weight-to-size ratio to 608 bearings, so I modified the spinner to use them as counterweights instead. I also tweaked the knurling in the SCAD file to prevent partial knurling on the edges. Being somewhat of a perfectionist can be beneficial at times. Please note that using v5 files is recommended because they are the latest version available. Other files are preserved for legacy purposes only. Requirements: One 608 bearing Three nuts Everything press fits without glue. Enjoy! Models exist for various nut sizes, including: Half-inch Half-inch FAT Three-eighths inch Five-sixteenths inch Quarter-inch M12 M10 M8 I updated the model on May 21, 2017, and created version 5 with better wall dimensions and tighter nut openings. I also designed a "fat" version that sits flush with half-inch nuts and bearing caps. On March 8, 2017, I added models for metric M10 or M12 nuts. I modified the SCAD file on February 20, 2017, to scale according to different sized nuts based on measurements from https://www.fmwfasteners.com/blogs/faq/hex-nut-dimensions. I also created models for three-eighths inch and quarter-inch nuts. On February 15, 2017, I modified the SCAD file to add chamfering to the outer edge for a more pleasant feel in the hand. I updated the SCAD file on February 10, 2017, to allow users to specify normal knurling or inverted knurling. I also uploaded STL files with inverted knurling for three or two weights. Print Settings: Printer: Monoprice Maker Select V2.1 Rafts: No Supports: No Resolution: 0.1mm - 0.3mm Infill: 20%