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Worth1 · March 26, 2017

Going to post pictures and come back and edit.
Worth

Okay first pictuer shows just about as close as I can get to the required number of .03125.
IMG_20170326_25263.jpg

Showing the angle on the compound rest 1°47' darn close if you ask me.
IMG_20170326_3651.jpg
Here is the setup to do the angle.
Run the carriage along the stock to make sure it is running true.
Then set the indicator on 0 and run it exactly one inch and it will move the required amount when correct.
You can see the wrong taper in the pictuer.
IMG_20170326_54504.jpg
The right taper turned for the fast set up tool at the right angle.
IMG_20170326_14224.jpg
Threading dial set at 1 it rotates and you have to engage it with the half nut at the right numbers or your threads wont come out right in other words out of time.

IMG_20170326_52774.jpg
Cutting tool set upside down lathe running backwards and feeding out not in running at 200 RPM.
This allows me to keep any pressure with the cross slide on the work as it feeds out.
It isn't going to happen running into the taper as you cant control it.
doing it this way you have no worries of crashing the tool and you can stop it as you darn well please all it does is run off the end of the work.
Taper turned to 3/4 inch long for 3/4 pipe.
You dont have to worry about any other dimension as the taper will make it right if it is the right length.

IMG_20170326_33431.jpg
Thread test needs to be cut deeper and where I messed up.
But you can see the taper is right.
I got the work out of time as the pipe turned a wee bit in the chuck and had to reset the timing.
No big deal but then I fooled around and got off a tooth when I engaged the half nut.

I caught it but not before it trashed about 3 threads I wasn't going to use anyway.

IMG_20170326_13249.jpg
Last but not least the fitting on the new threads.
This was 3/4 conduit and it makes trashy threads anyway.
I thing this proves proves the point.
You can cut pipe threads on a lathe without a taper attachment.
I have yet to see anybody do this there are so many unorthodox things going on.
Tool upside down and threading out not in.
Lathe running backwards.
Running the cross slide in while cutting.

IMG_20170326_25491.jpg

March 26, 2017	#214
Worth1 Tomatovillian™ Join Date: Feb 2006 Location: Den of Drunken Fools Posts: 38,539	Going to post pictures and come back and edit. Worth Okay first pictuer shows just about as close as I can get to the required number of .03125. IMG_20170326_25263.jpg Showing the angle on the compound rest 1°47' darn close if you ask me. IMG_20170326_3651.jpg Here is the setup to do the angle. Run the carriage along the stock to make sure it is running true. Then set the indicator on 0 and run it exactly one inch and it will move the required amount when correct. You can see the wrong taper in the pictuer. IMG_20170326_54504.jpg The right taper turned for the fast set up tool at the right angle. IMG_20170326_14224.jpg Threading dial set at 1 it rotates and you have to engage it with the half nut at the right numbers or your threads wont come out right in other words out of time. IMG_20170326_52774.jpg Cutting tool set upside down lathe running backwards and feeding out not in running at 200 RPM. This allows me to keep any pressure with the cross slide on the work as it feeds out. It isn't going to happen running into the taper as you cant control it. doing it this way you have no worries of crashing the tool and you can stop it as you darn well please all it does is run off the end of the work. Taper turned to 3/4 inch long for 3/4 pipe. You dont have to worry about any other dimension as the taper will make it right if it is the right length. IMG_20170326_33431.jpg Thread test needs to be cut deeper and where I messed up. But you can see the taper is right. I got the work out of time as the pipe turned a wee bit in the chuck and had to reset the timing. No big deal but then I fooled around and got off a tooth when I engaged the half nut. I caught it but not before it trashed about 3 threads I wasn't going to use anyway. IMG_20170326_13249.jpg Last but not least the fitting on the new threads. This was 3/4 conduit and it makes trashy threads anyway. I thing this proves proves the point. You can cut pipe threads on a lathe without a taper attachment. I have yet to see anybody do this there are so many unorthodox things going on. Tool upside down and threading out not in. Lathe running backwards. Running the cross slide in while cutting. IMG_20170326_25491.jpg Last edited by Worth1; March 26, 2017 at 07:44 PM.