- Joined
- May 16, 2016
- Messages
- 1,701
Hello,
Has anyone had threading problems with their 1340 lathe, such as wrong dial engagement information on the Legond plate or in the manual or incorrect dial gear, leadscrew, incorrect half nut etc. My lathe is made by the same mfg of the PM1340 Liang DEI of Taiwan but is their 1236GH model which in every way identical to the 1340 (same p/n's) . My issue is the engagement info is wrong or incorrect internal parts, according to the manual/dial legond plate to thread a 20 TPI I am to use any number 1-8 on the dial but I get a mess after threading (thread splitting). Upon further investigating I found if I use either 1,3,5,7 or 2,4,6,8 I get a perfect thread. I have checked all parts for correct dial tooth count (32), leadscrew TPI (8). I have had no luck with the company I bought the lathe from , they claim if I am now able to cut threads then use that method but I disagree, I would have to go through every thread TPI to verify the engagement process. Anyone have any suggestions of what may be going on.
Hi, I have just read your question re. screw cutting. And agree that it would be quite a disappointment to discover your new machine has a defective user manual. In following your post I gather that this sis not an uncommon problem.
However my interest is somewhat different, in your original question you state that your lathe, a PM 1340 is made by the same factory as the Liang Dei of Taiwan. You also say that your 1340 is the same as their 1236. I find this interesting because my lathe is the LD 1216 These are sold here in down under as LD brand machines. It should be the same machine only somewhat shorter bed. Sometimes it's uncomfortably short, but I wanted the largest swing I could get and I had a very short space to put it in so as with everything it is a compromise, I had been looking on this forum for a similar lathe so that I could read relevant comments but no one appeared to have an LD product.
However if you are certain that PM is made by Liang Dei then I have have the group that I need. Thank you. I had noticed that PM lathes looked remarkably similar to mine, but that doesn't mean they are the same. The other thing is that PM products do not appear to be available here in downunder. So there was no way to check.
Unfortunately it would seem that I might have the same problem as you, but as I haven't done any screwcutting yet I can't confirm it, but will be on the lookout for it. So far I am quite happy with my lathe, still getting use to it as I don't get a lot of shop time.
Bob.