Ideal length of ER 70 S 6 1.20 & 0.80 MM WIRE PER KG

By Lawrence (*****)

Date 06-14-2011 12:53

Welcome to the forum.

This sounds like a math problem for student homework :)

What is the production benefit to knowing the length of filler wire vs weight?

By Kix

Date 06-16-2011 16:29

Did you just ask that question on a test? Probably a student in the middle of a test on his smart phone. lol

By jarcher (**)

Date 06-17-2011 13:57

Yeah it does, but if so, the course instructor is asking really obtuse questions without almost any real world application.

By Lawrence (*****)

Date 06-17-2011 14:30

There is a ton of real world application in a question like that.

It's all math... and we welders are fooling ourselves if we think we can master our trade without it.

By Milton Gravitt (***)

Date 06-17-2011 16:39

If he was in the middle of a test I believe he should have Google the question.LOL

M.G.

By Kix

Date 06-20-2011 16:15

Are you speaking from experience? lol ;-)

By Milton Gravitt (***)

Date 06-20-2011 17:49

Back when I went to school Kix we didn't have what they have today.If you do a search you can just about fine the answer to just about anything. These guys here know when it's probably a test question.

M.G.

By Kix

Date 06-27-2011 21:16

I know man, I was just messin with ya. ;-) I know Lawrence is a mighty fine teacher and can spot a welding text question with the best of them.

By jarcher (**)

Date 06-18-2011 19:04

Well I would agree with that as both a welder and one that has gone as far as differential equations in college. But calculating the length of wire needed to deposit X amount of weld metal still seems of minimal practical import and more than a little obtuse to me. Just my opinion.

By Lawrence (*****)

Date 06-19-2011 00:23

Oh I agree the reason behind the question seems unusual.

All I was saying is that there are a couple of calculations necessary and that's good math practice :)

Most welding wire is ordered by the pound rather than the FT/Meter

By DaveBoyer (*****)

Date 06-19-2011 01:33

So if it is going to vary from nominal size, would You rather have it larger or smaller in diameter?

What is the tolerance on welding wire?

By Lawrence (*****)

Date 06-19-2011 05:20

Big enough to make consistant contact with the contact tube, small enough to fit through the hole :)

By PhilThomas (**)

Date 06-20-2011 13:27

Dave - that is a very good point. In addition to the tolerance (typically =/- 0.002), you have to look at whether the supplier is manufacturing the wire to metric or imperial units. A 1.2mm wire is actually 0.047 vs 0.045 imperial target. Add a tolerance on that, and multiply it by 15 kg (or 33 lbs LOL) and you can have quite a difference in the length of wire on a spool.

There actually is a case where it is important to know the length of wire in a package vs the weight. If you are running a mulit-head setup and want the reels to all run out at the same time, it is better to have an equal length on the spool.

By DaveBoyer (*****)

Date 06-21-2011 01:23

I use .030 MIG tips for the gas orfice in forge burners. I seem to remember measuring the hole at .037".

I have a 110 volt "MIG" welder that wasn't feeding reliably. Turns out it had a .030 tip on it, but I was trying to put .035" self shielded wire through it. When it worked , the diameter must have been on the lower side of the tolerance, when it jammed, the higher.

By Kix

Date 06-20-2011 16:18

My highschool welding instructor used to take off points for not useing proper grammer or complete sentences when we answered our welding questions. lol

By Blaster (***)

Date 06-19-2011 18:13 Edited 06-19-2011 18:16

Like a real math problem, the work is in figuring out how to go about setting up and solving the problem. Running the equations is the easy work. Sounds like a homework question to me... although I think some info is missing or was posted incorrectly.