Torque on cone nuts, also skewers
Is there a specified torque setting for cone nuts on rear hubs. In case you are wondering it is the rear hub original to a late 80s (?) Schwinn World Sport. I have them torqued just enough to avoid axle wobble.
Also, are there issues with installing QR skewers on such an old hub?
There is no "torque spec", you adjust the cone and locknut until there is no play but the wheel turns freely. For a nutted hub, you adjust to absolutely no play. For a qr hub you leave a TINY amount of play that tightening the qr skewer removes.
To use a qr skewer in a nutted hub, you will need to replace the solid axle with a hollow one.