[Richard Wallace]

Originally Posted by Ben Piecuch

I'm looking at your very well crafted assembly, and can't help but wonder if there's a way to directly link the Globe output shaft to the input shaft of the torque multiplier. Have you opened up the gearbox (via the 4 screws) and looked at the input shaft? Can that square socket attachment be machined down to fit a collar over both it and the globe output? Any further details would be greatly appreciated. Thanks!

I did open the torque multiplier and just posted an image. It might be possible to modify the input shaft to accept an in-line coupling to the Globe; however, I wanted to preserve the option of re-using the torque multiplier later on. I also wanted to minimize machining. So far I've only turned some brass spacers, broached a square hole, drilled and tapped in two places in the torque multiplier arm, and laser-cut a motor mounting plate. Still need to laser-cut a stack of double-D adapters which I can bolt onto the (faced-down) drive sprocket to make it suit the Globe shaft. I also plan to run a die onto the 1/4" stub of the Globe shaft so a jam nut can be used to keep the drive sprocket on. Power take-off will be via a standard 3/4" socket driving a piece of hex stock, which I'll turn down to fit in standard pillow-blocks. The same hex will be used to drive the arm.

Sorry for the cryptic description -- I'll post some more pictures when I get this built.