Diameter Wire Question

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Diameter Wire Question

Post by Texasbowhunter » November 4th, 2017, 11:37 am

Alright guys
Need some guidance...
I am a beginner welder to say the least...done it once or twice and mig and stick looked like expected...a angry beaver had done them...
Have acquired a Hobart 210MVP and am going to start getting all stuff I feel may help with a advanced weld appearance...
Going to use Gas mixture rather then flux core...
going to build the entire GF out of 14ga. exterior skins and the tubing will be 14ga. And the fire box and shoot will be 1/4" and 1/2" respectively
I understand I'm going to have to make several passes on the 1/2" firebox to get it completed...
So the question here is what size of wire would be best suited for this project
Should I go .035 in the heavier stuff and drop down to .030 on the lighter stuff
or can I get away with the same diameter for all like .030/.032? Since there is more skinning then the fire box area
I have the starter spool that came with the unit which is flux cored
I am going to have to buy another roll larger to get the me thru this project and will buy what is necessary

OH 1 more question while I'm on the subject
I have noticed that there are mig tips that are sized to wire diameter...
What's the purpose of the tip sized to the wire diameter...
I understand the obvious where you can't shove a .035 wire in a .030 hole...but a .030/.032 wire will go into a .035 hole
A bit of reasoning would be help full with the understanding as to why...

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Re: Diameter Wire Question

Post by Smurf » November 4th, 2017, 12:35 pm

Definitely go with bigger wire for the thicker metal. I like .045 for 1/4” and up but I don’t think your machine can run it. Practice and then practice some more. Seen some you tube videos that can be helpful. I would think that you could use .035 for the entire project but I don’t weld a lot of thin material. Maybe somebody will chime in for that. You can get away with a larger tip but proper equipment is always best. Make sure your drive roles match wire. jm2cw Good luck and have fun.

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Re: Diameter Wire Question

Post by Rodcrafter » November 4th, 2017, 3:22 pm

I use .035 for everything even 1” thick stuff I heat the steel up with a rosebud and make as many passes as I feel I need. I can turn the machine down and weld drum lids to Weber grill lids and that stuff is thin. I have had some practice but you can do just about anything with a mig.


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Re: Diameter Wire Question

Post by Big T » November 4th, 2017, 5:49 pm


Measure Twice.....Cut Three Times.

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Re: Diameter Wire Question

Post by Weldun » November 4th, 2017, 8:13 pm

I too run .035 wire on everything from light sheet to heavy plate. It's an all around middle of the road wire.

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Re: Diameter Wire Question

Post by mp4 » November 5th, 2017, 10:01 am

Ditto on the 035 as an all purpose diameter.

I did use 030 on my mini but only because it was donated by my nephew who was using my welder for his demo derby car. I didn't think it helped much, if any on the lighter material.

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