Ted Edwards wrote:

This shows the making of a propellor drive speed reduction that *really*
involved pushing the envelope on my Smithy 3-in-1.

http://www.metalworking.com/DropBox/Prop_speed_reducer.pdf

Ted

Nice looking PSRU, Will you anodize it to harden the grooves?? what type
V-belts ? regular automotive, special construction ??
Tension adjustment ? or idler pulley.
Does circlip take prop thrust.??----Jerry