[SEL] IH3M Belt Pulley

Rob Skinner rskinner at rustyiron.com
Mon Feb 14 21:04:07 PST 2005


> I am having some difficulty obtaining a belt drive pulley for the 3M.
> I am considering turning one up on the lathe out of hardwood.
> Has anyone ever done this? 

Yep, I've made several.  See the scribbles at
http://temp.rustyiron.com/pulley.jpg

Cut out some disks of plywood with a jigsaw.  Slop 'em with glue and clamp them
together.

Get/make a thick tube with the ID matching your shaft.  Cutting a keyway is
nice, but if you cannot easily do so, drill and tap two holes for setscrews 90
degrees apart and near opposite ends of the tube.  

Make a round, flat plate, with a center hole sized to fit the OD of the tube.
Tube goes in plate.  Weld her up.  Turn so plate is true to tube.  OD of plate
should be somewhat smaller than the finished size of your pulley.  Drill four
holes in plate, 90 degrees apart, near the outside edge, 45 degrees from the set
screws.  

After plywood dries, bore a hole to fit the tube, or a hair smaller.  Press wood
disk onto shaft.  Starting with the holes in the plate, drill through the wood
disk.  Bolt it on.  

Turn the face of the wood disk down to clean it up, then put a crown on it.
Bore two holes to match set screw holes.  Done.


=-=-=-=-=-=
Rob Skinner
La Habra, California
mailto:rskinner at rustyiron.com
http://www.rustyiron.com 








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