Vintage Horticultural and Garden Machinery Club

I have an idea I once welded a fine threaded nut on the existing nut end as was still captive in the flywheel, but you must use a very tough ended draw stud or you will damage the crankshaft, tighten and warm with a hot air gun and leave, do this several times before giving the draw bolt a sharp tap, small hammer only as many small taps better than something to do damage.