Torque tube bearing installation tool

thingiverse

A jig to install an 8x14x4mm bearing straight and centered on an R/C helicopter's torque tube. Most R/C helicopter torque tubes are 20xx aluminum arrow shafts and more like 7.93mm (slightly too small for 8mm bearings but slightly too big for 5/16 bearings). The bearing is installed in the jig which is then slid onto the shaft. CA is applied to the shaft (I use the end of a zip tie as a "brush" for this) and then the jig and bearing is slid forward over the glue and left for a few minutes until it sets, then the jig is removed. I recommend Locktite or Gorilla super glue as these are formulations that have higher shear strength, more impact (and vibration) resistance and they fill gaps better than plain thin brittle CA.