So what's the easiest way to square off this pipe?

[rsallen]

I want that pipe!
It would make a dandy forge alrighty.

 

[square1]

then measuring from the base up all around the pipe will make for a square end. The other way to do it is to level the pipe horizontally and do the same thing on the ends.

or transfer the straight base to the pipe wall using a compass set to the size of the gap.

 

[FTG-05]

place pipe on upside-down furniture mover dolly and spin, mark it, then spin it into an affixed angle grinder ?

I had exactly the same idea. I might need someone to rotate it for me if I can't come up with a simple way to get a 1/3" hp (chinese HP) motor to rotate it for me.

For a wrap around, I was thinking of using a hose clamp. Or just marking it while rotating it on the upside down dolly.

Thanks for all the ideas, keep'em coming!!!!

 

[LD1]

how fast does that cheap chinese motor rotate?

You dont want the pipe to spin too fast. which is going to take some gear reducing. probably no easy way to do it. Easiest and cheapest would be offer a buddy a case of brewskies:drink:

 

[rsallen]

Yes by all means make it complicated as possible.

Jeez, either scribe it or wrap and mark it...............cut it off.
It ain't rocket science.

Or send it to me, I need a larger forge. :drink:

 

[ETpilot]

Go to Walmart or a paint store and get some heavy duty paint masking paper. It comes varies widths. You can wrap most of the pipe to get square. Then spray paint it. I would cut just outside the line then grind to the line. I have an 18" pipe that I need to square up too. I already have the paper as I just finished spray painting a house.

 

[bandaidmd]

Stick it on end in a box lined with a tarp , shim it plumb then add water and mark your cut line.

 

[muddstopper]

We still working on this???

 

[joshuabardwell]

Take it into a zero-G environment. Then install a gyroscope in it to hold it steady. Now set a cutting laser in orbit around it, using radar range-finding to confirm that the laser's orbit is perfectly aligned with the axis of the cylinder. This will occur when the laser's orbit is perfectly circular (its orbital velocity will be constant) and the laser's distance from the surface of the cylinder is constant. Use monopropellant thrusters to slide the cylinder up or down along its axis so that the laser will cut in the right place. The thrusters must be perfectly symmetrical with each other, and centered on the cylinder's center of mass. Re-confirm that the laser's orbit is still perfectly aligned. Finally, activate the laser to commence cutting. The force of the photons coming out of the laser will cause its orbit to change slightly, but this should be within tolerances for the project and does not need to be compensated for.

YOU'RE WELCOME.

 

[Shield Arc]

Take it into a zero-G environment. Then install a gyroscope in it to hold it steady. Now set a cutting laser in orbit around it, using radar range-finding to confirm that the laser's orbit is perfectly aligned with the axis of the cylinder. This will occur when the laser's orbit is perfectly circular (its orbital velocity will be constant) and the laser's distance from the surface of the cylinder is constant. Use monopropellant thrusters to slide the cylinder up or down along its axis so that the laser will cut in the right place. The thrusters must be perfectly symmetrical with each other, and centered on the cylinder's center of mass. Re-confirm that the laser's orbit is still perfectly aligned. Finally, activate the laser to commence cutting. The force of the photons coming out of the laser will cause its orbit to change slightly, but this should be within tolerances for the project and does not need to be compensated for.

YOU'RE WELCOME.

______________:laughing::laughing::laughing::laughing::thumbsup: