09-01-2015, 12:29 AM
I finally got the feedscrew repair finished on my lathe.
I had cut the replacement 1" 5tpi l/h acme screw months ago, got the outer dimensions of the nut finished last week after I finally got the mill up and running, yesterday i took the feedscrew out and took it to a friend's place, cut it in two using his chop saw (the point of no return!) and used his lathe to mate the two pieces.
Outer diameter at the plain section in front of the drive gear is 0.900, I bored it to 0.600 (actually ended up 0.6004) and 1.100 deep, then turned the male section on the new screw to 0.598" and 1.00 long.
Brought it home and mated the two pieces with some Loctite 620.
I left it overnight, then cross-drilled and reamed to take a small taper pin. Inserted the pin also with 620.
Left it for an hour or so then cut the ends off the pin and filed them flush. I have fitted the new screw and nut, and will have to get accustomed to working with .002 backlash on the crossfeed where I used to have about .042.
I had cut the replacement 1" 5tpi l/h acme screw months ago, got the outer dimensions of the nut finished last week after I finally got the mill up and running, yesterday i took the feedscrew out and took it to a friend's place, cut it in two using his chop saw (the point of no return!) and used his lathe to mate the two pieces.
Outer diameter at the plain section in front of the drive gear is 0.900, I bored it to 0.600 (actually ended up 0.6004) and 1.100 deep, then turned the male section on the new screw to 0.598" and 1.00 long.
Brought it home and mated the two pieces with some Loctite 620.
I left it overnight, then cross-drilled and reamed to take a small taper pin. Inserted the pin also with 620.
Left it for an hour or so then cut the ends off the pin and filed them flush. I have fitted the new screw and nut, and will have to get accustomed to working with .002 backlash on the crossfeed where I used to have about .042.
Lathe (n); a machine tool used in the production of milling machine components.
Milling Machine (n); a machine tool used in the production of lathe components.
Milling Machine (n); a machine tool used in the production of lathe components.