Fitting a large propeller to shaft

[hogpatrol]

For those interested in HUGE, old machine tools, there's a website called industrialhistory,blogspot In the search box, enter Big machine-tool. There's a lathe on there with 80' between centers.

 

[338 Mollett]

75 hp motor where do put the diesel fuel ? lol

 

[Will Henry]

Having spent many years working in an industrial machine shop setting (mostly working on mining equipment), I'm always fascinated to see these pics. My son works on sport boats; I'll have to send him these pics. WH

 

[Kittitas George]

A friend has a lathe to turn ship's masts, like masts for the Constitution. I haven't seen it in use.

 

[kneedtospeed]

My son works on sport boats; I'll have to send him these pics. WH

You see, then we just tub out the floorboard on your new ski boat, install this oversized prop from the video I saw, and voila!

 

[Coyotefurharvester]

I wonder what types of tools/tooling we will see in a decade or two...

 

[hogpatrol]

I wonder what types of tools/tooling we will see in a decade or two...

Fewer than now. More parts are being made with 3D printers.

 

[BP1]

Wondered about that wooden box at the start of the video which became evident shortly.
Long ways from your men's first installation!

You were wondering about the box and I was trying to figure out the song on the radio

 

[butchlambert]

Y

View attachment 1274139Red or blue loctite on those nut threads, Lol!

You may want to slide a couple props on first.

 

[sdean]

View attachment 1274139Red or blue loctite on those nut threads, Lol!

One way is to weld a strap from one side of the nut across the shaft end to the other side of the nut.

 

[Adam in WI]

One way is to weld a strap from one side of the nut across the shaft end to the other side of the nut.

Done something similar to the steering arms on tractors except we weld around the entire nut. It'll still break.

 

[rwj]

If the tapers are fitted/assembled properly, no retaining devices are required…

 

[sdean]

If the tapers are fitted/assembled properly, no retaining devices are required…

I guess everybody in the boat business has been doing it wrong.

 

[jackieschmidt]

One way is to weld a strap from one side of the nut across the shaft end to the other side of the nut.

That is exactly how hey lock the nut.

 

[jackieschmidt]

If the tapers are fitted/assembled properly, no retaining devices are required…

I have seen boats on dry dock where the keeper and nut were missing and the prop still be tight on the taper.

The shaft thread would be rusted all up,

Of course, all shipyards install a locking strap on the nut.

 

[tac284]

Great pictures, appreciate you sharing them.

I’ve always had an interest in a Kingston lathe, what do you think of yours?

 

[sdean]

I have seen boats on dry dock where the keeper and nut were missing and the prop still be tight on the taper.

The shaft thread would be rusted all up,

Of course, all shipyards install a locking strap on the nut.

I have seen it too. I have also seen one in a kort knozzle that was lying against the rudder. But I wouldn't trust my 120 inch wheel to stay on without a nut and strap. As long as you never put it reverse it would stay on for sure. I had a ZF gear on my oyster boat that on front coupling they used hydraulic pressure to expand the coupling and slide it up on the shaft. No fasteners.

 

[sdean]

Jackie I had a little bow thruster that made up to the front on a tow. It had a tunnel across it with a prop on each side of the strut. Around 1980 you made a shaft for me to convert it to 1 prop. At the old Channel shipyard.

 

[jackieschmidt]

Great pictures, appreciate you sharing them.

I’ve always had an interest in a Kingston lathe, what do you think of yours?

A number of years ago, Kingston bought the rights to manufacture Mazak manual machines, as Mazak ceased building manual machines. Whacheon did the same thing with MorI Seki.

They are pretty good machines for the sort of work we do. We have had a few parts break on our 28 ft Kingston. Some of the parts in the gear train in the quick change are too light for the capabilities of the machine. I personally think they are miss engineered. But they get the job done.

 

[jackieschmidt]

Jackie I had a little bow thruster that made up to the front on a tow. It had a tunnel across it with a prop on each side of the strut. Around 1980 you made a shaft for me to convert it to 1 prop. At the old Channel shipyard.

We still work on those bow thrusters on occasion. Several of our larger customers have several.

Channel Shipyard is still there. I think about all they do now is clean and defume barges.

I have seen many companies come and go in the past 50 years. We are still here.