htd belts are cheap and can easily do that.. suggest 8 mm teeth and 25 mm wide.
for marine use always use as big as practical.
its an impact load, although you would not think so.
Want to share some findings on my 38 ft sailboat, and ask a question. Initial testing with an ME0709 Motor belt coupled to propeller shaft behind the Hurst transmission on my diesel provided pretty decent electric drive results. The Drive ratio was about 2.75:1 between motor and prop shaft. Even though the motor was capable of accepting 24 to 72 VDC, I found running at between 36 and 48 Volts provided satisfactory results, considering I still have a working 50 HP diesel when needed.
In order to transmit the motor torque at 48 Volts, I had to jump up to a BX cogged V-belt. It seemed to operate without slippage. However the relative friction was too great to be really useful for regeneration. With a lighter "A" size belt I was able to charge my 12 volt house battery by allowing the prop to drive the motor while sailing at anything over 4 knots. This is a very useful benefit considering 90% of my time on the water is sailing.
So in order to have both low friction and good torque transmission, I think my next iteration will be to a single timing belt drive. Looking for suggestions on type and size of timing belt assuming I need to transmit at most 8 HP with about 1500 RPM at smaller pulley
Thanks
Art
Posted by: CNC 6-Axis Designs <gcode.fi@gmail.com>
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