Saw

The Saw from Better With Mods is an item that can be connected to a Water Wheel (BWM) (using an axle) in order to cut logs into planks, and planks into other items, more effectively than using a manual Chopping Block.

Crafting
You can craft it using one (1) Flint Saw Blade, two (2) copper Gears, one (1) bronze gear, one (1) Leather Belt, and two (2) planks of any variety.

Usage
Simply right-click the log or wood item in question that you wish to have cut against the blade of the saw after the saw has been placed on a rotating axle and the saw will cut it. Some of the products of using a saw are: - planks - sawdust - bark - sticks - Planks Siding - Planks Moulding - Planks Corner

and many more. Basically, if it can be chopped on a manual chopping block, the saw can do it better and faster.

Protip
You can automate the saw by placing hoppers underneath it and an Block Placer from the Cyclic mod one block away and facing the saw.