Nah.
Use a flexible coupler from rubber, industrial.
Not expensive at all. Std stuff.
Go up 3 sizes for your hp.
Marine use is an impact load from the prop, about 5x the hp rating typical for cars.
And this data is from a manufacturer of this marine stuff.
Any metal-metal contact wears out really fast, in a constant-load friction state with real loads of several hp.
So if you have a 20 hp motor, get a coupler for 60-90 hp.
Perhaps 50 $, 90$.
Perhaps mcmaster-carr, misumi, etc.
A thrust bearing should not have any play.
But if you do use the flexible coupler, you can then use soft motor mounts.
Much less noise, much less vibration.
This is, commonly, used in the marine industry.
It occurred to me that having a little axial slip in the shaft somewhere between thrust bearing and motor would be a good thing. 2 hours of googling failed to turn up an ideal solution for my 7/8" motor shaft and 1" prop shaft. I know many golf carts use splined motor hubs. What I want to do is adapt the 7/8" motor shaft to maybe a 1" female 6 spline coupler, then couple a short 1" splined shaft to the 1" round drive shaft, so if there is any play in the thrust bearing, it won't allow any load to be transmitted to the motor. Has anybody here done anything like that? I would like to avoid a custom machined solution if I can. From what I am seeing that would cost me a minimum of $400 to $600. Off the shelf components would be really sweet.
-- -hanermo (cnc designs)
Posted by: Hannu Venermo <gcode.fi@gmail.com>
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