Vintage work crew photos

**jackhoying** · May 19, 2020, 05:59 AM

Originally Posted by Jon

Fullsize image: https://diqn32j8nouaz.cloudfront.net...n_fullsize.jpg

I really like the style of scaffold supports they are using on the boats. Simple and effective.

**Unkle Fuzzy** · May 19, 2020, 08:30 AM

Originally Posted by Drew1966

I’m wondering what the planetary gears are for in this application? It’s not a differential as it’s a single drive.

In this case I would say it's the counter rotating of 2 screws. The spur gears reverse the rotation.

**hemmjo** · May 19, 2020, 09:12 AM

I am thinking the small bevel gear nearest to us ma just be an idler. The stubby shaft has no means to transmit power into or out of the system.

If you look close on the side opposite, you can see another bevel gear that could be the input.

You can also see part of a large gear peeking up out of the case. If this gear box is for a ship, that is very likely on the prop shaft.

It is difficult to see, but it is possible there is a shift collar between the two large bevel gears. If there is it could give forward, neutral, reverse.

Trying to think what the straight cut gear on the right end of the shaft could be used for.

Just some speculation...

**IntheGroove** · May 19, 2020, 10:54 AM

Just a reverse gear with reduction. Input is on the right. The first narrow gear runs a oil pump. The two large bevel gears are not fixed to the shaft. The shift mechanism is in the center. In neutral only the input shaft and pump are turning. In forward the power goes straight through. For reverse the two bevel gears are energized hydraulically. The gear reduction is on the left.