What should be used to counteract the significant sliding action between meshing teeth in hypoid gears?

In the context of hypoid gears, which are designed to transfer torque across shafts that are not parallel, significant sliding occurs between the meshing teeth during operation. This sliding action can lead to increased wear and heat if not properly managed. The use of extreme pressure (EP) lubricants is crucial in this scenario because these lubricants contain additives that help reduce friction and wear under high pressure and sliding conditions.

EP lubricants create a protective film on the gear surfaces, which minimizes direct metal-to-metal contact and helps to dissipate heat caused by the sliding motion. This protection is particularly important in hypoid gears due to their unique design and the substantial loads they typically handle. The right lubrication not only enhances the performance of the gears but also extends their life by reducing the risk of damage caused by both wear and scuffing.

In contrast, shims, shaft collars, or extra set screws addressed in the other options do not directly mitigate the effects of sliding action between gear teeth. While each of these components plays a role in maintaining alignment or securing components, they do not provide the lubrication necessary to reduce friction and wear in the way that EP lubricants do. Therefore, utilizing EP lubricants is the most effective way to counteract the challenges posed by