08-09-2017, 10:30 AM
In Dr Stan thread, about locating a milling machine head, he mentioned he wanted to increase the number of speeds on his Fray milling machine, I said I would post some picture of how I did it. I wanted to leave the machine as stock as possible, so I made a "transmission" insert, to remain single phase, for the both the Jet JVM 836 and the newly acquired Rockwell milling machines. I know I could have gone with a 3 phase motor and a VFD, but I didn't to incur the cost (motors and VFDs), and as most of the pieces were either already on hand or were very cheap to acquire.
On the Jet JVM 836 I went from 5 speeds ranging from 250 to 1500 rpms, changed to 25 speeds, ranging from 48 to 1550 rpms.
On the Jet JVM 836 I went from 5 speeds ranging from 250 to 1500 rpms, changed to 25 speeds, ranging from 48 to 1550 rpms.
jack