What are the differences between the two mine winches shown
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No
ATV winches can be found on a variety of different sites online, such as amazon or ebay. You can also most likely pick them up from your local Sears.
One could purchase Warn winches from Canadian Tire, the physical stores and online. The Warn Winches are weather resistant and reliable electric/hydraulic winches used in industries.
There are many places that provide satisfactory electric winches. One of the most reliable places with the widest spread array of electric winches is Amazon.
What do you think a countweight does for a mine winding system.
The hydraulic winches are usually powered by a motor. They can also operate under water.
If you are looking for old winches, there are a lot of 4WD vehicles in the junk yard, you can probably find some winches attached to those vehicles, check in your local area.
The question should be what is the difference between a winch and a hoist. In this case they are both powered by compressed air. Both winches and hoists are available which can be powered by air, electricity, hydraulics, or manual power (other means of powering this equipment is also available). A hoist is made for lifting. A winch is made for dragging/pulling. A hoist is designed with a special safety factor, limit switches and redundant braking for overhead lifting. Winches are designed to a completely different criteria. Keep in mind that several companies have manufactured "hybrid" winches which are made to lift. They are basically dual purpose pieces of equipment (hoist/winch).
Electric winches can be expensive and cheap. Depending on the size, model, and where you get it from. I suggest browsing your local DYI stores and try to find the best price.
With steam. It powered winches and cables.
The plural form for the noun winch is winches.
Hydraulic rams can be bought at sites such as truck supply, or at napa auto parts stores. They offer different weight limits and also different winches and accessories.
Metal wires / winches