Jet GHB1340 lathe mid-90's
I am just a hobby machinist so take it easy on me.
I'm trying to remove the lead screw so I can remove the apron. The power feed rod came out really easy after removing the shear pin. The lead screw is a very hard press fit. I don't think it should be. I put minimum heat and sprayed some WD40 and all I could do was just barely get it to turn with a pair of Channel Locks against the gear train, which I was not very comfortable doing for fear of damaging gears. I could only get it to move out a 1/2 mm turning and pulling at the same time, which is very hard to do. I don't know how to get enough force to extract it. I am hesitant to give it any real heat for fear of the nearby paint and gearbox.
It's so hard to turn, it doesn't even need a shear pin. It would probably still tear up the halfnut if you crashed it with the pin out.
Any suggestions?
My second question is about the alignment taper pins. There are two alignment taper pins connecting the saddle and apron. They are threaded on top for 5mm bolts, but what is the best way to extract them? I tried to lever a pair of pliers on a bolt threaded in the top, but it just started bending the bolt.
There are two in the feed rod/ lead screw support on the tailstock end of the lathe. They don't have any threading. How in hades do you get those out?
Thanks
I am just a hobby machinist so take it easy on me.
I'm trying to remove the lead screw so I can remove the apron. The power feed rod came out really easy after removing the shear pin. The lead screw is a very hard press fit. I don't think it should be. I put minimum heat and sprayed some WD40 and all I could do was just barely get it to turn with a pair of Channel Locks against the gear train, which I was not very comfortable doing for fear of damaging gears. I could only get it to move out a 1/2 mm turning and pulling at the same time, which is very hard to do. I don't know how to get enough force to extract it. I am hesitant to give it any real heat for fear of the nearby paint and gearbox.
It's so hard to turn, it doesn't even need a shear pin. It would probably still tear up the halfnut if you crashed it with the pin out.
Any suggestions?
My second question is about the alignment taper pins. There are two alignment taper pins connecting the saddle and apron. They are threaded on top for 5mm bolts, but what is the best way to extract them? I tried to lever a pair of pliers on a bolt threaded in the top, but it just started bending the bolt.
There are two in the feed rod/ lead screw support on the tailstock end of the lathe. They don't have any threading. How in hades do you get those out?
Thanks
Last edited: