27-05-2018, 01:30 AM
Fitting a nut to just the right thickness flat and square requires some skill. The repeat trial and error tightening of the nut may lead to the end failing from fatigue! If the hub is not perfect and stable and the nut can be later tightened the whole process has to be repeated. A second drilling at right angles assists.
Something is very wrong if any key fails, but I suspect the original were hard. I have seen many axles very hard hopelessly hammered and this could have only been done by a hard key. It seems soft ones preferable!
(On my everyday 1960s car I have had disputes over the years about adj of taper rollers. Producing the Maintenance manual only ruffles "expert" inspectors and makes them determined to find some other fail. So with two drillings in the axle, for every wof I tighten one increment and undo after. )
Something is very wrong if any key fails, but I suspect the original were hard. I have seen many axles very hard hopelessly hammered and this could have only been done by a hard key. It seems soft ones preferable!
(On my everyday 1960s car I have had disputes over the years about adj of taper rollers. Producing the Maintenance manual only ruffles "expert" inspectors and makes them determined to find some other fail. So with two drillings in the axle, for every wof I tighten one increment and undo after. )