While looking for a jack shaft I figured I'd check the slowest moving table. The sit up table. Instead of a jack shaft it had a 150:1 double worm gear reducer from Hub City. If the input is driven at 3X the 1725 motor speed the output shaft will run at 35 RPM. Or with a 3450 motor and 1:1 the speed is 23 RPM.
The gearbox may leak a bit of oil. Need to check the level.
Maybe after the muller is built I will change seals.
It might be a bad idea to couple the gearbox output shaft too tightly to the sand muller drive axle. Given the low RPM it need not be complex. Just something that interlocks and stays centered.
Still thinking about using the left over new bearing from the HF concrete mixer repair. They are 62mm outside and 30mm inside. Quite good sized. It maybe better to use tapered bearings like a car's front wheel but if they are good enough for the mixer they should work on the muller. After all its what is running on the HF mixter to muller conversions. Need to determine what is a suitable outer pipe and what to use for a drive axle.
I am musing about making the the base unit for several different machines. Build the tub and related parts as a unit that can be removed from the base drive unit.
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