Thrust bearing for electric drive - SailNet Community
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post #1 of 6 Old 01-12-2018 Thread Starter
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Thrust bearing for electric drive

Repowering a Pearson Triton with electric.

Have sources for motor and controller.

One thing I see very little mention of on the internet is regarding protecting the motor from the large axial thrust forces imparted by the prop.

I see more than one E Propulsion vendor selling reduction gear systems that solve this problem but:
1- they are over $600
2- best I can tell, I may be able to get by w/o reduction gearing.

Any comments on the topics of the need for reduction gearing, and good choices for a simple thrust gear for a 8,000 lb boat?
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post #2 of 6 Old 01-12-2018
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Re: Thrust bearing for electric drive

Can't help you here, but I edited your thread title to perhaps garner some more specific responses... mbianka??
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Re: Thrust bearing for electric drive

a couple of reasons for a gear drive is that the motor needs to run at a higher RPM then the prop to produce HP and they do not cool well at low RPM

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post #4 of 6 Old 01-12-2018 Thread Starter
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Re: Thrust bearing for electric drive

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Can't help you here, but I edited your thread title to perhaps garner some more specific responses... mbianka??
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post #5 of 6 Old 01-13-2018
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Re: Thrust bearing for electric drive

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Can't help you here, but I edited your thread title to perhaps garner some more specific responses... mbianka??

Sorry can't help with this question. My Thoosa 9000 system was turnkey including the reduction pully and motor mount with built in thrust bearing. Never had to deal with thrust bearing calculations or supply.

Mike
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post #6 of 6 Old 01-14-2018
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Re: Thrust bearing for electric drive

Aquadrive makes thrust bearing systems for boats.

They use CV joints between the power source [i.e., engine/motor] and separately installed thrust plate.

This eliminates prop shaft/drive system alignment headaches, all with no axial load on the drive system.

Cheers! Bill


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