Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder

   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #1  

the old grind

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Google is not being our friend. Searching for drive rolls for our older Miller 'constant potential' welders shows several style rolls for Miller wire feeders, but we're coming up empty-handed on this one. We have no part number or other guide to what to ask for.

It seems the welder was set aside when it wouldn't feed smoothly, why we got two for $0.00. The rolls on one are .035 and so worn they can't get a grip on .045 wire. Are these so obsolete they're NLA even in aftermarket? Thanks for any help or info on this search.
 

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   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #2  
Isn't the CP200 just a power source? If so you'll need the model/serial from the feeder itself to do a search.
The miller website has a place to put in your model/serial number to find manuals.
 
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   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder
  • Thread Starter
#3  
Don't need to specify power source to see all the rolls there seems to be, apparently. (Miller, CyberWeld, ebay, unaimit dot com, etc.) Any search shows pages and pages of newer roll types but none like ours. Pat says there are a bunch of rolls at the shop that are 'you take' as with the obsolete 200s and 300s he's bringing out. He says 4-roller feeders for 300 will somehow not work with the 200, and I'd sure like to hear his reason why. If not just 'plug & play' there has to be some way out of his confidence, and he knows me better than that.

I chewed up a few insert corners on the lathe and polished down the roller diameters to make up for such worn grooves. Gear mesh still held them apart some, but before lapping teeth down we tried with what I'd done so far. Grabbing great and feeding .045" smoothly for now. That said, Gary and I have alternate concept of proper grounding and/or assuming all contact is solid. Example: Secure -clamp to bench, lay 3 oz part on bench, and put down an inch of bead for practice. Then with pliers pry the part loose from where it welded itself to the benchtop somewhere. Gary said spatter was rusty wire. I thought it might be rusty workpiece.

Anyway, if Pat is right there could be a few sets of rollers coming. I'm ready to lap gear meshes if I have to (teeth don't bottom out) or other things. I was surprised how true the gears went into the tiny HFT 3-jaw, for 20 vs 21 teeth. There just wasn't much I could do, though. I peeled about .010" from both rollers. they wouldn't grab .035" wire but worked fine with .045". Pictures show different here lately and I'll get a better one of the whole setup when I hear the dinner bell. It doesn't look like anything Big Barn Terry would live with cosmetically.
 

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   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #4  
If you are able to look up the manual for the feeder it might have the roller part#'s listed which will increase your search.

There's a lot of NOS miller parts on ebay but sometimes they are only listed by part numbers.

I haven't had great luck just searching through welding supplier websites for pictures.
 
   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #6  
I could have swore that I had a set of these; we replaced an old feeder at work and I brought the old one home for parts. Still have the motor that has the matching gear, but all of the rollers I have are the quick fits.
The geared ones I was thinking of were these, don't know where they came from, might have had to replace the drives in my MM250, can't recall for sure.

Rolls.jpg
 
   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #7  
I think the Miller 10E feeder used those drives. Other feeders too from that era. Didn't the old MM35 and 200 use them too?
 
   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #8  
Try calling Miller on mon. I have heard they are very helpful, but have never had to call them before myself.
 
   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #9  
Here's the part#'s for a 10E feeder which appears to use the same rollers in your pictures.

No results from the number search but might help if you call Miller.Screenshot_20200412-024724_Drive.jpeg
 
   / Identify/replace drive rolls w/integral gears, Miller CP-200 MIG welder #10  
I guess the Miller folks didn’t know how to covert decimal points into fractions.



Adjustments.jpg
 
 
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