“Practice" does not make perfect you Jackass…..Only “perfect practice” makes perfect!!!!

[Runs With Scissors]

I would like to thank everyone!!!!

@ken erickson , that was a great write up/explanation sir…Thank you

I just turned the most beautiful 12 pitch thread.

Here she is



Here she is under 6.2X magnification.




I am super stoked!!!!!!!

I followed y’alls advice and it turned out great!

First I “Un-F’d” my compound, and set it at 29.5 degrees FROM PARALLEL!!!




Then set my tool square to the work piece using the “fish-tale"


Then zero’ed everything.



Then using about .005 cuts, I slowly took some passes….Here it is as I progressed.




Now I just gotta figure out how to use these “measuring wires"




Not having a nut to test it, I am going to give these things a “whirl”.




I also forgot to address the question of "WHY I decided to try it in reverse."

It basically boiled down to me not wanting to have to worry about crashing into the head.

The way Joe Pie describes it, threading in reverse gear, sounded like a good idea….So I tried it.

I must say that I do like it, However I can see where “regular threading” with inserts would be handy…..(SO I ordered a set like @Lil Foot )

LIVE UPDATE:

As I was typing this, Mrs. RWS opened my package of “emory thread"



ALL DRESSED UP AND READY FOR PROM BABY!!!!!!! WHOOOHOOOOOOO

Here she is under 8.2X magnification



I don't care if thats cheating or not….I like it!!!!!


(I know…I know….."calm down dumbass, you don’t even know if it fits")

 

[ken erickson]

Got to love it when a plan comes together! Good job


Side note,

The main reason for the 29.5 degree compound setting rather than straight in perpendicular is to reduce the cutting tool force and "generally" will give a nicer finish with less chance of chatter especially with deeper threads. With 29.5 degrees the cutter only cuts on the leading edge angle of the 60 degree included angle of the cutter. This becomes more important on long unsupported threads and slender work pieces.

 

[Lil Foot]

Now I just gotta figure out how to use these “measuring wires"

Or you could buy Thread Mikes:

0-1" Screw Thread Micrometer, 0.001" Graduation | Haas Tooling

Screw thread micrometers are used to measure the thread pitch or threads per unit length of screw threads. This micrometer features an inch thimble graduation, stainless steel anvils, and a stainless steel spindle. Included anvils can be found in chart below.

www.haastooling.com

Or Thread Triangles:

https://www.travers.com/product/accurate-accessories-tt-60-micrometer-thread-triangle-57-004-157?utm_term=&utm_campaign=Shopping+-+All+Products+-+US&utm_source=adwords&utm_medium=ppc&hsa_acc=5580074735&hsa_cam=20586475565&hsa_grp=152585624823&hsa_ad=675182168798&hsa_src=g&hsa_tgt=pla-294682000766&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gad_source=1&gad_campaignid=20586475565&gbraid=0AAAAAD57yTugfTxwsZgRzUDysE69DZcFX&gclid=CjwKCAjw-rTUBhAiEiwADv8gBFO1lS7C_2MUa8xAr31rOCi_eUa17zErCAnbDNhALG5xSwEkezKDnBoCDKoQAvD_BwE

Oops- theres that buying thing again!

 

[Runs With Scissors]

Or you could buy Thread Mikes:

0-1" Screw Thread Micrometer, 0.001" Graduation | Haas Tooling

Screw thread micrometers are used to measure the thread pitch or threads per unit length of screw threads. This micrometer features an inch thimble graduation, stainless steel anvils, and a stainless steel spindle. Included anvils can be found in chart below.

www.haastooling.com

Or Thread Triangles:

https://www.travers.com/product/accurate-accessories-tt-60-micrometer-thread-triangle-57-004-157?utm_term=&utm_campaign=Shopping+-+All+Products+-+US&utm_source=adwords&utm_medium=ppc&hsa_acc=5580074735&hsa_cam=20586475565&hsa_grp=152585624823&hsa_ad=675182168798&hsa_src=g&hsa_tgt=pla-294682000766&hsa_kw=&hsa_mt=&hsa_net=adwords&hsa_ver=3&gad_source=1&gad_campaignid=20586475565&gbraid=0AAAAAD57yTugfTxwsZgRzUDysE69DZcFX&gclid=CjwKCAjw-rTUBhAiEiwADv8gBFO1lS7C_2MUa8xAr31rOCi_eUa17zErCAnbDNhALG5xSwEkezKDnBoCDKoQAvD_BwE

Oops- theres that buying thing again!

Wish I had a "money tree” (Or one of your famous “bin stores” near me )

But in the mean-time, I’ll stick with my "Chi-Com Thread sticks"


My mill needs/needed a “Ram Lever”




and since I am a newly minted Threading King,

I walked over to the scrap pile (that I still have not cleaned up) and looked around for a “donor"



Found this…...



Then I knocked out a 3/8-16 thread on this rod that was/were “Dead nuts” in the middle of class 2A thread specs…..

I actually had a hard time threading it in. (Had to run a tap in the hole to clean it up)


This is 12X magnification.




"Tis a thing of beauty"




Looking at my calendar, it appears that it is "International Internal Threading day"

and since this little bad boy showed up last night…...



It’s shaping up to be a ”Hum-Dinger” of a day!!!!!!



It’s all "fun and games”, until the "tool bill" shows up and has to be paid

 

[#40Fan]

Now you need to put a relief at the end of the threaded section so you have a place to stop the tool when threading towards the chuck.

 

[Runs With Scissors]

Now you need to put a relief at the end of the threaded section so you have a place to stop the tool when threading towards the chuck.

EDIT: No sir…..I have decided to go a different route entirely.


OK, well, things did NOT go as planned.

I crashed my lathe, not ONCE…..But F’ing TWICE……(no pics)

Threading to the lathe chuck F’ing sucks my a$$…

After I got done chastising myself for being a dumbass….TWICE…and a long protracted cursing session!!!!!!!….I went to the Big A and immediately ordered a LH Internal threading bar, so now I can thread in reverse, toward the tailstock. (just like Joe Pie says to do)

I guess there's a reason they don’t put pockets in coffins…..So whats another 80 bucks aye’ ?

 

[ken erickson]

Interesting how experiences vary! Out of curiosity what RPM is your head stock running when you're threading? What RPM range does your lathe have?

 

[Runs With Scissors]

Interesting how experiences vary! Out of curiosity what RPM is your head stock running when you're threading? What RPM range does your lathe have?

It goes from 70 to 1400 rpm, (I think??? maybe 1600)

I was on the 70 speed when I screwed up…

 

[ken erickson]

Gotcha! I have had 3 different Chinese geared head lathes but did not remember the slowest speed. I think the old SouthBend lathes with back gear had about 50 RPM as the slowest speed.

Sorry about crashing and no damage! Appreciate your posts and pictures as always!

 

[bird dogger]

I'm a little late to this party and this might be considered cheating...... but South Bend has a great little booklet called "How to Run a Lathe". You can buy hard copies or find free download .pdf versions all over the internet.

It contains all the basic setups and directions for all kinds of operations and made my first thread cutting attempts turn out great. It's a super quick reference book for most all basic operations on the lathe. And it's hard to beat FREE.

But if you consult it before starting your project, it does make you feel like you're cheating!!

 

[Lil Foot]

I crashed my lathe, not ONCE…..But F’ing TWICE……(no pics)

On the subject of crashing:

If your lathe is electrically like mine (and I suspect it is) there may be a problem to be aware of.

If you are power feeding or threading towards the headstock, and see an imminent crash approaching,
DON"T slap the spindle into reverse.
It will continue in forward and crash with enthusiasm.
The spindle must come to a complete stop before reversing, or it will continue on in forward.
Don't ask me why, this Birmingham is the only machine I have ever run that does it, but I have heard the same problem exists with Shop Fox, Jet, & Enco models. (don't know about Grizzly)

It is easy to check, just use lots of room & low speed.

Don't ask me how I discovered this.