Finding the end of a bend?

[Mike]

How do you find the end of a bend in a tube thats not bent to 90 deg? Do you just look at the tube and mark it where you think the bend ends or is there a way to know right where it ends? Im about to start bending some parts that have multiple bends and I want to make sure i do it right.

Thanks
Mike

[Bugpac]

mike you always layout the start of the bends before you bend mutiples, then there is no need to find the end after wards, do you have the bend tech ez? if not call were you bought the bender and buy it, its like 30 bux, saves a whole bunch of guess wrok....

[Mike]

Thats what Im trying to do. So far this is what I have come up with. Say I have a 16 deg bend with a 4.5" radius. From what I understand you can find the amount of tubing needed for this bend by 4.5 x 6.28 x degree divided by 360. Do I make the tube this distance from the start of the bend? If so this is easy. I just want to make sure.

I want to bend some tubing tonight. *

Mike

[Bugpac]

i believe so, you also know that the start of the bend is not the edge of the die correct? did you bend the 180 test bend to find the start and calibrate the clr, 4.5 is not always right on, every die can be different from reading the book that came with the bender?

[Mike]

Yeah I did the testing for the die set today. The bend starts .625" from the edge.

Mike

[Bugpac]

mike pm me the numbers from a dual bend tube, then i will run it in the bend tech to see if your calculations"the hard way" are that of bend techs.. *lets say the hoop...

[Mike]

you should be able to make out the info you need one the drawing above.

Mike

[Bugpac]

so you layout the start of bends then make a line .625 behind the start, set that line to edge of die correct?

[Mike]

Thats right. The die set is a 4.5" radius for 1.5" tube.

Mike

[Bugpac]

ok mike, lets say a hoop, 40" tall to center of tube, 20 " wide to center of tube, 90 degree bends, you figure that and post the layout dimensions, *length, start of bend 1, start of bend 2, ill run it and we can compare to see if your figuring right, but the start of bends, dont add the .625 just actuall dimensions...