How are water-tight transmissions made, like the kind you see on inboard boats, pumps or food blenders?

Question

I want to replicate the kind of interface you see on inboard boats, pumps, or food blenders. Basically, I want put a motor in a sealed vessel, and have it turn a prop outside the vessel, in water.

Is this usually done just with a layer of grease over a bearing? Are there any alternatives?

score 1 · Accepted Answer · answered Nov 11 '19 at 17:42

1

The seal you are looking for is commonly called an oil rotary seal ring.

I found many brands and sizes with a quick search.

the range of prices for a 1-inch shaft is around $5.

answered Nov 11 '19 at 17:42

kamran

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How are water-tight transmissions made, like the kind you see on inboard boats, pumps or food blenders?

1 Answers1