Extension Handle for Lee APP

thingiverse

This handle adds an extension to the small handle of the Lee Automatic Processing Press (APP,) and really increases the comfort and speed of the press. To mount the handle, I replaced the existing bolt and nut using a 1/4-20 x 4" bolt from Lowe's (threaded portion 1"/~25mm not threaded all the way up,) two washers, regular nut, locknut filler, and a nylon lock nut. I had to extend the threaded portion about 1/4" (about 6.5mm) to get enough thread for the lock nut to get a good bite. I've made this with PLA and PETG and they both seem to work fine. Assembly is straight forward. A washer goes against the bolt's hex head, the bolt is slipped in the outer portion of the handle, a second washer and bolt are tightened to the end of the thread, then inserted through the Lee handles where the locknut filler and lock-nut are tightened. The trick is to have just enough play between the handle and two washers so it spins freely. A little grease certainly helps to keep it rolling smoothly. It is, of course ambidextrous, so put it on whichever side you want. I found the most support and comfort came from keeping my thumb and forefinger around the Lee handle, and the rest of my hand on the extension. I included the SCAD so you can tweak this to fit your hand. Update. I added a small 7/16" wrench to hold the bolt in the handle while tightening the lock nut.