| Author |
Message |
    
wrenchguy
Advanced Member
Username: wrenchguy
Post Number: 38
Registered: 03-2008
| | Posted on Wednesday, February 10, 2016 - 09:58 pm: | 
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3/4" shaft with 10" prop, long reach coupling and bearings, why the bearings?
http://i113.photobucket.com/albums/n210/wrenchguy49/SAM_0161_zpspir4p1sw.jpg
http://i113.photobucket.com/albums/n210/wrenchguy49/SAM_0164_zpsb3antg9p.jpg
http://i113.photobucket.com/albums/n210/wrenchguy49/SAM_0165_zpsgptwjibz.jpg
http://i113.photobucket.com/albums/n210/wrenchguy49/SAM_0163_zpsjebopsux.jpg |
modhydro
Advanced Member
Username: modhydro
Post Number: 49
Registered: 08-2004
| | Posted on Friday, February 12, 2016 - 04:01 pm: |
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Mike,
I can only guess that someone must have had some sort of mount to act as a whip strut somewhere in the middle. With the regular shaft log though, I can't see where it would gain much of anything on a relatively short length.
Steve |
wrenchguy
Advanced Member
Username: wrenchguy
Post Number: 39
Registered: 03-2008
| | Posted on Friday, February 12, 2016 - 09:17 pm: |
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i thought maybe some kind of rube thrust bearing setup with mount or yoke to stringers taking load. just putting it out there.
thanks steve |
miro
Senior Member
Username: miro
Post Number: 846
Registered: 11-2001
| | Posted on Monday, February 15, 2016 - 08:09 pm: |
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The bearing is mounted backwards to taking any thrust from the prop in the forward direction. It could be the bearing was used to take the thrust when the boat / engine were in reverse.
The only thing holding the shaft into the hub would be a set screw. If the set screw were loose, then the shaft would wiggle out, you'd lose the key into the bilge and the boat would essentially be adrift.
I know, because it's happened to me.
Miro |
wrenchguy
Advanced Member
Username: wrenchguy
Post Number: 40
Registered: 03-2008
| | Posted on Tuesday, February 16, 2016 - 11:24 am: |
|
I agree its for reverse as shown, even the ballbearing with its outer race looks installed take reverse thrust too. maybe when this was removed from the hull it was put back on the shaft random wrong.
the coukping hub is 2 keyed and held with nut and cotter. that maybe raises more questions....
thanks 4 commenting.
http://i113.photobucket.com/albums/n210/wrenchguy49/SAM_0173_zpsta0jctuh.jpg
http://i113.photobucket.com/albums/n210/wrenchguy49/SAM_0174_zpscxjkmtne.jpg
http://i113.photobucket.com/albums/n210/wrenchguy49/th_SAM_0175_zpsxobjaer1.jpg |
gregoryan
Senior Member
Username: gregoryan
Post Number: 132
Registered: 09-2004
| | Posted on Tuesday, February 16, 2016 - 06:09 pm: |
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perhaps the tapered bearing was merely used for it's inner race as a spacer-sleeve/ or interference-fit backing which could have been pressed up the shaft to the right position for the ball race!? Oh Boy! |
