A round bumper for rails and other round objects.  In order to get the proper effect, this is best printed out of TPU or similar material.  A Fusion 360 parametric file is included so that you can adjust the dimensions to fit your needs.  Parameters include outer diameter, hole diameter, thickness, tolerance for the inner hole, and width of the slot.  The actual size of the inner hole automatically adjusts when given the hole diameter parameter and the tolerance parameter.  The STL model is 2" in diameter and 1" thick with a ¾" hole in the middle and a 1/8" slot.  The tolerance for the center hole is 0.005".

Print Settings (using MatterHackers Pro Series TPU):

Nozzle: 0.4mm

Layer Height: 0.2mm

Infill: 5% (adjust infill for more or less cushion)

Top/Bottom Layers: 6

Walls: 3