Restoring Jet 1024PY

That is exactly what I was expecting to see. I will email your picture tothe Grizzly Tech Support people to see if that helps them find the correct part. Thank you for the quick response. I appreciate your help. I will let you know how it turns out.
 
I would like to know how this restoration project is going. I have recently purchased a jet 1236ps lathe and I'm going to begin a similar project, except that mine is cleaning and possibly replacing components and no repairs (hopefully)
 
Dave... I imagine that one could always just drill and tap another hole. That way you wouldn’t have to fight lining up the threads of the current set screw. If it were mine... I’d probably put a little loctite on it before I started drilling/tapping a new hole.
 
Update on the lathe restoration: Back in Sept 2018, I gave up trying to make the leadscrew work for the tailstock and fabricated a lever action for it. That has worked OK, not ideal but better than nothing. With that complete, I have had a function machine lathe. Last month I was finally able to take the machine shop class at our local "Maker Space" which will allow me to use their machine shop when I need it. During the class, I had an opportunity to use their Grizzly lathe and it tailstock leadscrew. The experience convinced me that I needed to get the leadscrew on my lathe fixed. I had the leadscrew that came with the machine but no nut for the quill. The original lead screw is a 14 mm 8TPI left handed acme thread. That seems simple enough, unfortunately 8TPI is not a standard acme thread for 14mm. There are no nuts available in that size and there are no taps in that size. I talked with a number of people about this issue, including a local machine shop. Everyone agreed that cutting the male thread is no problem but cutting a female thread that size would be difficult without a tap.

I finally decide to bite the bullet and buy a matching left-handed acme thread and nut and replace the whole thing. I ordered and have received a 12 inch threaded rod 1/2 x 8TPI, left handed acme thread and a matching round nut. Unfortunately, the round nut was about .015 too big for the recess in the quill. No problem, I have a lathe, I can just turn it down. But wait, how do you hold a 1 inch nut so you can turn the entire length. I though of putting on the threaded rod and hold the rod in the chuck, but since it is a left handed thread it would spin away from the chuck. Next I though of making a couple of cone ends to thread onto a smaller bolt to hold the nut, which would have probably worked.

About this time I was reading through "The Shop Wisdom of Philip Duclos" and came across the article "Temporary Self-Locking Stub Mandrel". This was exactly what I needed, IF it would actually work on the threaded interior of the nut. If you have not seen it, it is an ingenious and simple means of holding a piece with a center hole. It took me about 30 minutes to make one for the nut. It consists of a shaft turned to be a close fit to the center hole of the piece to be held. Next file or mill a flat paralle to the axis of the mandrel. The flat needs to be just deep enough that a piece of wire will fit between the flat and the inner diameter of the piece to be help with about .002 clearance. Finally, holding the chuck rotate the workpiece clockwise to wedge the wire pin and lock the workpiece on the mandrel. All I needed to do was take two light passes and the nut was a good interference fit with the quill.

I was/am amazed at how simple and how effective this little trick was. I will be sure to keep it in mind as I continue to play with my lathe.

Now all that is left is to drill out the bearing bracket, machine the threaded rod to fit that hole, press the two together, and reassemble the tailstock leadscrew and its bearing and I will have a functioning tailstock with leadscrew. That will complete the "restoration" of this lathe. This has been an interesting project that I believe will allow me to build many other interesting projects.

Attached are two pictures: one of the mandrel and the locking pin and on of the mandrel and pin in the nut (after it had been turn to size and pressed into the quill)289984289985
 
Reading back through all my posting, one of the thing that I never mentioned was the replacement for the crossfeed bearing bracket. What I finally did was draw it up using Sketchup so I would have all the necessary dimensions. Once that was done, I talked with the 3-D printing guy at Ideaworks and we just printed it. Turns out the length measurement was off by about 3/8". This bracket is not a bearing piece, it simple hold the bearing for the crossfeed as well as the index mark for the vernier scale on the crossfeed. I cut the extra length out of the middle install a steel washer as a collar for the mounting bolts to press against and a steel liner to reinforce everything. It has worked wonderfully, even if the orange plastic looks a little out of place on the lathe. But hey, it works!
 
Great, I forgot is yours a P or a PY, I found that the spindle is diff on a PY than a P, Thus I am having fun getting some chuck backing plates and a face plate for it.
 
Great, I forgot is yours a P or a PY, I found that the spindle is diff on a PY than a P, Thus I am having fun getting some chuck backing plates and a face plate for it.
According to the name plate, mine is a Jet-1024PY, serial #102034.
 
Great, I forgot is yours a P or a PY, I found that the spindle is diff on a PY than a P, Thus I am having fun getting some chuck backing plates and a face plate for it.
According to the name plate, mine is a Jet-1024PY, serial #102034.
 
Does it have a spindle that matches the M52.
do you have a source for faceplate or backing plates for chucks that fit, Have seen and found some for the P but not the PY.
how does it cut and function now that you have it rebuilt. Mine is nice, but still may put some scales on it.

spindle.jpg
 
Does it have a spindle that matches the M52.
do you have a source for faceplate or backing plates for chucks that fit, Have seen and found some for the P but not the PY.
how does it cut and function now that you have it rebuilt. Mine is nice, but still may put some scales on it.
I do not know exactly what size the spindle hub is. I will measure it this evening and let you know. When I got mine, it included a 3-jaw scroll chuck and a 4-jaw independent chuck, and a faceplate; all of which fit on the hub. So far I have not tried to find any additional things to mount on the spindle.

I like the lathe, especially considering there was no initial cost involved. But, understand I have (1) no experience and (2) nothing to compare it to so my opinion is not much to rely on.
 
Back
Top