The RotaChock is a self-leveling, adjustable and reusable machinery mounting chock. The RotaChock is a self-leveling, adjustable and reusable machinery mounting chock. The chock is used under the driver or driven machines or equipment that requires coplanar mounting surfaces. The RotaChock quickly and economically eliminates soft foot for equipment in production lines and for the life cycle. The RotaChock has several attributes that makes it technically superior to shims, poured chocks or other mechanical chocks. The RotaChock uses a standard thread that has a higher load carrying capacity as compared others, comparative bearing area on the foundation top plate that is larger and adjustability that is actually easier and for some sizes larger than the others. In comparison to poured chocks the installation of the RotaChock is minutes versus hours. Shims have their uses in some markets but they require a time consuming trial and error alignment process and expensive milled foundation or pads. With the RotaChock the mounting process is: align, insert, adjust finished! Most installations require no surface preparation and never special tools.