csxeng wrotebadtheba wrotecsxeng wrote
I bet at one time the jointer was an add on but the person couldn’t find the motor extension and the 5 inch pulley kit. So it was this setup that was used. Very ingenious setup as long as it works. All on one bench!
Dave V.
I wonder if Magna originally planned the 4E to be able to be run standalone. I haven't seen that in old marketing materials yet, but maybe someone else knows. It has bosses in the casting to be able to bolt it to a table or stand, so it would make sense to run it directly from its own motor. Of course that mounting method would make the jointer headrest unnecessary, so I'm not discounting this individual's ingenuity. As someone else mentioned, we don't know the motor RPMs, so with the right pulley setup it might already be in the best range. Isn't 6000-7000 recommended for this size jointer?
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In the owners manual it does have plans for a bench to have it as a stand-alone machine. I believe it also says something about what motor and pulley to use.
The Jointer Mounting Kit instructions doesn't mention powering it as a separate unit. http://vintagemachinery.org/pubs/detail.aspx?id=2704
The Jointer Manual has plans for a separate stand, it says this was to meet requests after the fact.
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The unit under discussion appears to have a 2" pulley on the jointer and a 3" pulley on the motor. A 3450 rpm motor, in this configuration, would turn the jointer at 5175 rpm, which is right in the ball park for the recommended speed of 5000 rpm. 🙂
