Threading a 1.5" tube?

[wacki]

Got any recommendations for how I can thread a 1.5" tube?

Or a place to get a tap & die set that big?


Thanks!

[Historian]

Got any recommendations for how I can thread a 1.5" tube?

Or a place to get a tap & die set that big?


Thanks!

There are a legion of great instructive YouTubes, starting with Tubalcain.

<< http://www.youtube.com/results?search_q ... on+a+lathe >>.

The videos here are as close you can get to visiting our esteemed gunsmiths on
this site and watching them.

Prime is to to set tool precisely perpendicular to the cylinder with a 'fish*' and
at the height of the lathe's compound ( e.g., on a 6" lathe set the tool at 3"
dead center; 12" lathe at 6"; etc. )

A true sense of achievement when mastered.

Good luck.

* << http://i.ebayimg.com/t/Brown-Sharpe-650 ... y~ilSShw-/$(KGrHqEOKpIFJBcZqOB5BSShw98FUw~~60_35.JPG >>

[Scared_of_zombies]

Do you have (or have access to) a lathe?

[a_canadian]

If you're shopping for large taps and dies, this store seems to carry a lot of larger sizes in metric threads. M35 x 1.5mm:

http://www.ebay.com/itm/35mm-x-1-5-Metr ... 1c20cf1cd2

M35 x 1mm:
http://www.ebay.com/itm/35mm-x-1-Metric ... 1c2087f92e

Just guessing at your wall thickness. You may want to go for 34mm or 36mm, couldn't tell you without knowing ID on that 1.5" tube.

Now running it smoothly into a tube is another question. You'd want a pretty fancy and stable jig before attempting that by hand, and lots of cutting oil and patience.

[Dr.K]

What is the wall thickness, and do you have a lathe?

[wacki]

What is the wall thickness, and do you have a lathe?

I can get access to a lathe through a friend.


Looks like it'll cost me $200 to be able to thread the tub and the cap?

I plan on threading a bunch of stuff. Project #1 is a tube 1.5" OD X .060. That's not for a silencer so I may not thread that one for cost reasons. Still working on my Form 1 designs....

[Dr.K]

Damn that seems high. I guess one off machined parts would be though. Are you anywhere near northwestern Louisiana?

[bakerjw]

IMHO... The only reliable way to thread is single point threading on a lathe. A tap or die to clean up the threads is acceptable, but single point is the way to go. People don't want to hear it, but it is essential that you maintain colinearity in all parts.

[Historian]

IMHO... The only reliable way to thread is single point threading on a lathe. A tap or die to clean up the threads is acceptable, but single point is the way to go. People don't want to hear it, but it is essential that you maintain colinearity in all parts.

+2!!

Said efficiently, effectively, and unassailably.

And what a sense of achievement when mastered after a few test
trials and botched attempts. Comparable to mastering stick shifting/double clutching
on a fine tuned performance sports car such as an Aston Martin.

[mysticofjesus]

IMHO... The only reliable way to thread is single point threading on a lathe.

Nah, you're forgetting thread grinding, threadmilling, and EDM tapping.

Sorry, he said "unassailably", so I had to.

[Historian]

IMHO... The only reliable way to thread is single point threading on a lathe.

Nah, you're forgetting thread grinding, threadmilling, and EDM tapping.

Sorry, he said "unassailably", so I had to.

When a man is right, he is right. Thank you for the
added scenarios.

Context was taken to be to be lathes that most non-pros use 'at home'.

Now if Ray Brandes knows of a serious discount on the lathe he made the
unassailable S&W 41 Bully Barrel I will most gratefully sign up.

<< http://www.youtube.com/watch?v=fSzXNlQ97VI >>

[Archilochus]

Looks like it'll cost me $200 to be able to thread the tub and the cap?

Darn - at that cost it would make more sense to just pick up an old 6" / 9" South Bend or Atlas. See them in the $400 area around here.