making the grooves for a mig feed roller?

[desbromilow]

Hi Des, can you tell me what brand & size of the mig welder as I may have some parts from old welders

Thanks Trevor

It's my Dad's old transMIG 190 - the rollers are 30mm in diameter. I found Bossweld offers a range of 30mm rollers which are 19mm wide, and that allows me to put a M5 set screw between the grooves (0.8 and 0.9 mm) to engage on the flat of the shaft.
The welder came to me broken down with some intermittent faults stopping the wire feed. I found nearly every connection inside was loose, and the pilot relay from the handpiece switch is on it's way out. I think I now have it fixed, so the next step is getting it to feed wire.

Des