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MIG Welder Feed Roller Groove Shape ?

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awemawson:
The feed roller on my Migatronic KDX-250 is worn to the point that the feed is erratic, and my welding is even worse than usual.

As I'm having a bit of a problem sourcing a new one (email sent to Migatronic but no replay as yet) I'm thinking of skimming the feed roller and cutting a new groove - but what shape?.

Now the current one is very rounded, but I thought that round grooves were just for aluminium wire not steel ?

If the consensus is Vee as I suspect, then I will use a small 60 degree threading insert as the steel is pretty hard.

Of course if someone has a Migatronic 0.8 (or 0.6) mm feed roller in their pocket I'd like to hear from you !

chipenter:
My Clark has a knurled groove bet a vee would work as it will only cost a little time .

b4dyc:
IIRC My welder has a vee groove in it, but had/has a different type for using with my emergency gasless rolls that has a knurled groove. Not seen that for years though  :Doh:

PekkaNF:
There was some science to it....can't remember exactly, but I think for normal solid steel wire V-grove is the way to go. There were some complications with tubular wire and aluminium wire.

Those looks expensive:
https://www.ikh.fi/en/w-drive-roll-v-axle-0-6-0-8-m25610184
https://www.ikh.fi/en/w-drive-roll-v-axle-0-8-1-0-m25610185

Pekka

Chipist1:
Maybe this will do it
 https://www.migatronic.biz/eSales/esa/ItemDetails.jsp?@where.ItemID@EQ=72200016&clearCache=clear

Regard Bent

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