Is it true that all saws have right-handed threads on the flywheel (turn nut clockwise, that is, to the right, to tighten) and left-hand threads on the clutch? If so, are there any exceptions that AS'ers are aware of?
right-hand/left-hand threads
- Thread starter rmihalek
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Think in terms of, if the crank is spinning and the fastener/clutch isn't, for whatever reason, the fastener/clutch will tighten itself and start to spin too. The opposite would be that the fastener/clutch would <i>un-screw</i> and fall off. That's a fairly elementary design concept and I guess I'd get a kick out of hearing the rationale for doing it otherwise. There may be some older saws by obscure manufacturers that do differently; I don't have enough experience to talk about "all saws".
Are you asking about current (or at least recent) production saws by mainline manufacturers, or do you have something else in mind?
Glen
Are you asking about current (or at least recent) production saws by mainline manufacturers, or do you have something else in mind?
Glen
I was thinking about newer saws, of the Dolmar/Husky variety. The way I imagine what you said was that if the engine were running, the threads on the flywheel side of the crank would have to be right-handed in order for the nut to tighten itself to the flywheel. Clutch threads would have to be left-handed to tighten a nut on when running.
