THanks will try Monday TuesdayHave you tried Technical arc
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Wire feed motors
Wire feed motors & gearbox to suit most MIG/MAG welding machines. High torque long life DC gearmotors designed for welding but also used for other applications. Available in 24V & 42V Right…technicalarc.co.uk
They do the motors so would expect they do drive bits
If shaft is small a split bush , worth a call