Newbie successfully threads gal pipe for clamps (photo too!)

[52RI]

Hi Folks,

I'm glad I followed Claw Hama's encouraging advice and bought a pipe thread cutter and a pipe wrench from Ebay and Tradetools Direct, respectively (I couldn't find my late stepfather's old pipe wrench). The thing arrived, I loaded my cut length of gal into the vice, put the cutter on the end of it with a little cutting oil and went at it. Hopefully, I'll have successfully added a pic to this post as per the instructions I've found elsewjhere on the forum. This pic will show the thing in action with many sexy metal shavings to boot.
Attachment 138391

I;ve done 3 now (pic of a finished one will be below) with a few to go. It's kind of fun in a zenlike way for the likes of me! The threads fit the carbatec pipe clamps i got on special at the show in Brisbane and I'm happy. I encourage all other newbies to have a crack at it if they so desire. One thing i've noticed is that the pipe slips somewhat on the wooden pieces i've got in my vice jaws. This limits the size of the threading I can do before it slips too much. I can probably scrounge a further holding device from somewhere but looking at the amount of thread I've got there does it look to be sufficient for the clamps? I can get the head of the clamp screwed in a few turns as it is. I'd appreciate opinions (if anyone is still reading!)

Attachment 138392

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[watson]

Looks like a "bought one " to me

Maybe a V block with 40 - 80 grit sandpaper within the V may give you a better grip.

Well done.

[DJ’s Timber]

One thing i've noticed is that the pipe slips somewhat on the wooden pieces i've got in my vice jaws. This limits the size of the threading I can do before it slips too much. I can probably scrounge a further holding device from somewhere but looking at the amount of thread I've got there does it look to be sufficient for the clamps? I can get the head of the clamp screwed in a few turns as it is. I'd appreciate opinions (if anyone is still reading!)

You should be able to pick up a bench mounted pipe vice pretty cheap.

In regards to the length of thread, a general rule of thumb with threads is to have the length of thread match the diameter of the pipe or bolt, so for example a 10mm bolt will have a nut that is 10mm wide. So whatever the diameter of your pipe is, the thread needs to be threaded on the pipe the same length.

[joe greiner]

You should be able to pick up a bench mounted pipe vice pretty cheap.

In regards to the length of thread, a general rule of thumb with threads is to have the length of thread match the diameter of the pipe or bolt, so for example a 10mm bolt will have a nut that is 10mm wide. So whatever the diameter of your pipe is, the thread needs to be threaded on the pipe the same length.

Correct for pipe on the order of 10mm. For significantly larger, the rule becomes ridiculous. Example from Machinery's Handbook, for pipe of 24 inches, the Effective Length is 3.25 inches. For all pipe sizes, add Vanish Thread of 3.47 threads, to account for chamfer on the die.

Most pipe clamps are 1/2", 3/4", or 1" nominal. The corresponding Overall Lengths (including V) are 0.78", 0.79", and 0.98".

Cheers,
Joe