Had a few hrs at it today so fully welded the internal spiral then set about a drive for it
View attachment 542 Used the motor and gearbox from a roller shutter door, had to turn the cog the was on the output from the gearbox (chain drive to the door) to fit a turned down hub from the same trailer axles that the other wheels are from, trouble was the trailer hub is cast so made it an interference fit the drilled and tapped a hole where they join, screwed a bolt in which had the head cut off but a slot for a screwdriver to tighten it
View attachment 541 All works quite well but a bit fast I think but not bad for a pile of scrap so far may have to get a VFD from somewhere (hopefully one will turn up on the yard) and may need some expanded metal for the drive wheel to grip on as it slips when first turned on but if I slow the motor down it could be ok