Re: Re: Re: Cheap 56,000RPM milling upgrade (not a dremel :)

> On Saturday 16 April 2005 11:28 am, John Stevenson wrote:
>
> > Abby,
> > Have you seen this link ?
> >
> > http://www.hemingwaykits.com/acatalog/Speed_Increaser.html
> >
> > It was also serialised in Model Engineers Workshop in Vol 101, October
> > 2004.
> >
> > Plus side of this system is you don't need to use a compressor.
> >
> > John S.
>
> Interesting gizmo...
>
> They mention an "oil-filled epicyclic gearbox" and I'm wondering what it is
> they mean by that.
>
> Makes me think of the gearing I encountered when I last took my cordless
> screwdriver apart, but at that time I was thinking of the phras "planetary
> gears", or at least that's what came to mind as I was trying to deal with
> putting it all back together after all the gears fell out.
>
> I wonder if driving one of these in reverse would work? The primary function
> of it as it's originally used seems to be giving more torque for speed, so
> working it the other way around seems possible.

That's it exactly.
The gears for this device are bought in from in the UK, HPC Gears but SDP or
similar will carry these in the US.
A cheap cordless would also be a good source for for the gear set and it would
just require a way to work around this.

The guy who designed this, Dick Stevens lives close to me and I'm due to visit
him over this weekend sometime, I'll read up on this before I go.

John S.



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