Wood Stripper

This is a simple block that will help you strip all the wood logs and stem (from nether tree). It won't need any sort of energy system. Also, there is no tools being used inside the machine so, get done with all the axe durability you waste on stripping the logs!
Simply craft it by pitting 4 stone axes on the corners of the crafting grid, a crafting table in the center, and the 4 empty slots on the central edges are iron bars. and that is it.

You can hook up hoppers from top, and every side for inserting wood logs. The stripped wood can be extracted from bottom.

Check images for everything you need.