Yes, you got it exactly right. Granted, you are only using one spline, but then that's what a keyway typically does. Also, you aren't tranmitting as much torgue as the gasoline engine, and the electric motor is smooth, not pulsating torque. I think it would be fine. Worst case, you have a machine shop broach a second keyway.
--- In electricboats@
>
> I'm racking my brain to understand what you're suggesting, but I think I
> understand now.
>
> It sounds to me like you are describing a 5/8" ID coupler that slips over
> the spline and to make it mesh with the spline, you'd need to machine down
> the key and either (1) narrow the key width at the OD to the spline gap
> width or (2) cut a slot in the key along its length to make the key grab 2
> teeth instead of one.
>
> You're asking for the coupler to transmit a lot of torque thru a very narrow
> 1 or 2 teeth instead of 14.
>
> It would work though.
>
>
>
> -mt
>
>
>
> From: electricboats@
> On Behalf Of danbollinger
> Sent: Monday, December 28, 2009 6:12 PM
> To: electricboats@
> Subject: [Electric Boats] Re: Source for coupler (14 spline, 5/8ths shaft)
> to motor or pully
>
>
>
>
>
> Myles' idea is a good one. Here's another. Buy a regular 5/8" drive coupler
> (there are dozens of different types) that uses a square key to transfer
> power. Then, grind or file the key to fit one of the spline grooves.
>
> --- In electricboats@
> <mailto:electricboa
> <williamdickenson55
> >
> > I am about to get seriously into converting an old outboard to electric.
> I've got all the parts laid out except one. Is there a commercial source for
> a coupler that would slide onto that 14 spline 5/8ths inch outboard that
> would be suitable for either direct drive to an outboard, or into a pulley.
> I'm trying to avoid the cutting and welding end of this if I can.
> >
> > I've seen quite a few comments, but not one that specifically mentions a
> source.
> >
> > Thanks
> >
>
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