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From: Leon Fisk <lfiskgr@gmail.invalid>
Newsgroups: rec.crafts.metalworking
Subject: Re: rod-mill project - "mains" electric motor advice
Date: Wed, 16 Apr 2025 08:49:56 -0400
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On Wed, 16 Apr 2025 12:26:15 +0100
Richard Smith <null@void.com> wrote:

<snip>
>Earlier in the "fwiw - rod-mill project start" (concentrating then on
>"metallurgical" part of rod-mill) someone mentioned continuously
>variable transmission speed ratio using two disks, with one impinging on
>the other at right-angles.
>
>https://en.wikipedia.org/wiki/Friction_drive

This is what the bottom tranny area looks like on my old Snapper
Snowblower. The silver colored disk is belt coupled to the 5hp engines
power-takeoff shaft. It spins all the time the engine is running. The
rubber disk contacts it when a hand grip is squeezed. The lever in
front slides it left to right changing speed and reverse by contacting
the other side of the disk. Everything you want is already here. This
is a common drive mechanism in the snowblowers here and some
lawnmowers...

https://postimg.cc/gallery/yzX0ybk

-- 
Leon Fisk
Grand Rapids  MI