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zobman
04-26-2008, 06:17 AM
I am looking at the clarke mig welders, the 125en and the 130en. I want to weld bike frames with using E.M.T., which welder would be better?

Doc Hollywood
04-26-2008, 08:50 AM
Get the 130EN

I have an old 100EN and you could always use the power.

My next welder is going to be a Hobart187 a 220 volt model.

zobman
04-26-2008, 11:20 AM
Isn't that a flux welder?


Get the 130EN

I have an old 100EN and you could always use the power.

My next welder is going to be a Hobart187 a 220 volt model.

Doc Hollywood
04-26-2008, 08:41 PM
It is a flux core and can be hooked up to gas. I have mine hooked up to gas and running .030 er70s6 wire.

zobman
04-27-2008, 06:11 PM
But will the Welder Weld E.M.T. very good? Do I need the power asjustment of a more powerfull welder then the 11en or the 125en or the 130en welder? Should I go after the 160en or 180en which are 220v? Does anyone have these and how do they weld on bike frames and E.M.T.? Thanks for your help!

TheKid
04-27-2008, 08:04 PM
I have a cheapo welder from Pep Boys that welds EMT just fine. It's the same as the cheapo welders fom Harbor Freight. If you're having trouble welding EMT, you're probably not sanding off enough of the zinc plating. Galvanized steel usually does not weld well unless you sand grind or chemically remove the plating. The fumes from welding zinc are toxic, as is the dust when you grind or sand it, so wear a mask.

zobman
04-28-2008, 06:01 PM
I let them sock in toilet bowl cleaner to get off the galvinize and then tried to weld them, but no luck!

TheKid
04-28-2008, 07:18 PM
That doesn't always work. I sand them with 60 grit paper, and get good results every time. In fact, the head tubes on my tadpole are made from galvanized steel fence post. When I discovered that it had the same ID as a head tube, I sanded the entire 8' length with 60, 80, then 150 grit paper. I also used it for the USS on the DW. On the tadpole, I originally used 1 1/4" EMT for the tubes, which have an ID that accepts flange bearings. When the kingpins bent, I went to Brad's Streetfox method, and used the fence post for head tubes and inserted them into the EMT so I wouldn't have to redo the kingpin inclination. Here's a pic:

http://i192.photobucket.com/albums/z66/edpol_photos/Tadpole%20steering/000_0208WinCE.jpg?t=1209424841

As you can see, it all welded up just fine. I put about 30 miles on the trike since I converted, and the welds held up, even with my cheapo welder.

zobman
04-29-2008, 09:04 PM
Hey Kid, what settings do you use on your welder (heat and wire speed), and what amps does your welder go to?

TheKid
04-29-2008, 09:23 PM
I have two settings. Min. & Max. Minimum is 60 amps, maximum is 95 amps. I only use the max setting, because I get no penetration with the min setting. With my stick welder, I used a setting of 70 amps and welded EMT with that too. I used 1/16" and 5/64" rods.

n9viw
04-30-2008, 01:50 PM
Kid, was that stick welding AC, DC- (DCEP/DCRP) or DC+ (DCEN/"straight")? I've had no luck so far in stick welding my 3/4" EMT with 1/16" 6013, I've resolved to wait until I get my MIG welder running before I try it on a bike frame.

TheKid
04-30-2008, 02:03 PM
It was AC. The welds were ugly, but they held. I made an attempt to make a mesh seat frame, but it came out crooked. I still have it in the garage somewhere. I kept it to monitor my progress. If I find it, I'll post a pic to show that it indeed held up. Youll see that it was so crooked, I didn't bother to grind the welds. At the time, I didn't know you were supposed to remove the zinc coating, and the welds still held up. That was a couple of years ago, when I first started welding. The only other welding I did before that was over 40 years ago in jr. high school shop classes, and most of that was O/A. We did very little arc welding.
Another example of using the cheapo flux core welder with EMT is the frame for the mesh seat on my current tadpole. That's made of 1" EMT, and it hasn't broken even under my weight. I weigh about 250 lbs.

TheKid
05-01-2008, 01:14 AM
I want to thank you guys for bringing this subject up. I forgot that I had that old seat frame, and now I can use some of it for making my tailbox frame.