Winch Gears

Winch gears are the gears having thick and strong teeth, often used in a heavy loads lifting equipment named winch. The main functionality of the winch gears lies in the conversion of high-speed, low-force input of the rotating handle or from electric motor (whatever may be the case) into a relatively low-speed, high torque output of the lifting drum. These tooth forms are quite different from those found in the automobile gearboxes and in power transmission applications.

The winch gears have a comparatively short lifespan. A standard winch gear may turn only a few thousand times in its entire life. But, there is no fault of the gear in it. The short working life of these gears is due to the kind of applications for which they are meant. The winch gears are, however, not subjected to overheating as they never run too fast to become hot.

Primary Varieties/Types of Winch Gears
Winch gears are basically of three types, which are as mentioned under:

It is one of the most popular and economical variety of the off-road winches. Strength, high torque load resistance, and smooth operation are the characteristic features of the planetary winch gears. These gears require a braking system to hold the load. This particular variety of winch gear is considered ideal for ATVs and other vehicles with confined mounting space. These gears have a transfer efficiency of about 65%.

These gears are distinguished by their absolute tolerance. Worm winch gears also have self-braking mechanism, which eliminates the need for a separate braking system for them. But, these gears lag behind the planetary winch gears in mechanical efficiency. The average transfer efficiency rate of the worm winch gears varies from 35% to 40%.

Spur winch gear is a highly efficient winch gear type. This gear possesses a fast line speed and is very reliable. The slight problem with this gear is of the space requirement, as it needs relatively more space, which makes it unsuitable to be mounted on some vehicles. In order to install them on vehicles with limited space, certain modifications are to be made in the gear accordingly. These gears also require a braking system, as is the case with planetary winch gears. Their transfer efficiency is 75% approx.

Application of Winch Gears
Winch gears are one of the most useful varieties or types of gears that are available at present. Care should be taken that ratchet not get engaged when the winch gear is turning, as it may cause the gear to malfunction. In general, winch gears are highly efficient and commonly found their application in boats (mostly sail boats); automobiles (in winches installed on them); and in pulleys (for lifting heavy weights).