paul.jameson wrote:it is not something which would concern me in the slightest.
Providing the shaft is well supported on either side of the slot I wouldn't have considered it an issue either. The load is going to be on the upper face and the thrust will be towards the front under power. Under braking, the torque arm will take the anti-clockwise rotational forces and the wheel spindle will do what . . . Try to rise up against the top of the slot - where it is already ??
I suppose that the spindle will try to drop in the slot under over-run (without brakes), but is this force high enough to move the locked spindle whilst the load is still on the frame ??
It doesn't look as though the spindle will be trying to jump up and down.
I would be very wary of heating and 'adjusting' the frame casting - do people actually do this ??
I admit its nice to "get it right"
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH