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Forum Index : Other Stuff : Any concrete experts here?

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Warpspeed
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Joined: 09/08/2007
Location: Australia
Posts: 4319
Posted: 07:54pm 27 Nov 2021
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It might be best to just drive the whole thing directly in the middle with something really robust like an old car differential. The tail shaft could then project out of one side beneath your bearing..

If you can find a geared motor with a slow enough output rpm, the whole thing then becomes quite straightforward.

I would not fret too much about rpm, the VFD will take care of that.  What you need to think about is having enough torque and physical robustness. The overall gear reduction might be something like 1,000:1 so not a lot of Hp will be required, just a very strong worm drive reduction gearbox.
Cheers,  Tony.
 
Warpspeed
Guru

Joined: 09/08/2007
Location: Australia
Posts: 4319
Posted: 08:14pm 27 Nov 2021
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How about a transaxle from a Vw (or something similar) locked in first gear.
That would give you a reasonably strong 12:1 to 15:1 right angle reduction gearbox at minimal cost.
Edited 2021-11-28 06:23 by Warpspeed
Cheers,  Tony.
 
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