Threading on a PM1127 lathe - turning instead of threading

[jbobb1]

Get yourself a fish tail.

https://www.mscdirect.com/product/details/86413879?fromRR=Y

 

[RWanke]

This is what's on the lathe itself. What's the top box for? If the middle is metric, the bottom box is inches, what's the top?

I'm just guessing but It could be feed rates for regular turning. ????

 

[Pcmaker]

Do I even need to use the threading dial? I've been just using the forward/stop/reverse sequence and no issues

 

[markba633csi]

You can't use the threading dial for metric threads. You can use it for inch threads, but you don't have to- it's optional
Mark

 

[Pcmaker]

Ok, good. Because it's confusing to me. I guess the only reason to use the dial is to thread faster as in to disengage the half-nut at the end of the thread, so you can pull the carriage back quicker or if you lose your place if you accidentally disengaged the half-nut?

Also, when threading, should you use the slowest speed when turning?

 

[jbobb1]

Also, when threading, should you use the slowest speed when turning?

That really depends on the tooling you're using, material your threading, and most of all right now, your reflexes.

 

[darkzero]

You can use the threading dial/half nuts for metric threads with an imperial leadscrew (and vise versa, imperial threads with metric leadscrew), just have to keep track of where you disengaged.

https://www.hobby-machinist.com/threads/cutting-metric-threads.22504/#post-199388

 

[Creativechipper]

This all sounds so familiar, I totally know the feeling of dealing with a change gear for the 1st time is intimidating. I took some pics and posted on this thread....

Threading for beginners

Finally gathered up all the basic stuff to start threading, I think... Threading wires, micrometer, thread pitch gauge (U.S) , fish tail gauge, and some tap and dies. I have watched a lot of videos and read a lot of stuff but this is still a bit intimidating. Equations to figure out size and...

www.hobby-machinist.com

Looks like you got it now, best of luck!!
Check a couple videos, you will see a pattern or rhythm that is helpful to follow and know about before threading.

 

[markba633csi]

Takes quite a few passes to cut steel threads- seems to take forever till the nut finally screws on. Last few passes need to be light ones to give good surface finish to the threads
M

 

[Pcmaker]

I was threading 1/2" stainless yesterday using 24 tpi. This takes patience. I was going .005 at a time and it took a long time. I would've been taking larger cuts if I was working with mild steel.

Should I be using cutting fluid when I'm using a carbide insert when threading? I hear carbide doesn't like cutting fluid.

I also ordered a center gauge today from Amazon.