Glycerin. Glycerin is an ingredient that can be found in many beauty products because of its moisture locking properties. It is a form of sugar alcohol that is available naturally in vegetable oils and can also be the byproduct of soap making.
Definition of wheel and axle : a mechanical device consisting of a grooved wheel turned by a cord or chain with a rigidly attached axle (as for winding up a weight) together with the supporting standards
Wheel bearings are bearings between the wheel and the axle. Read here if you donât know what a bearing is - Bearing (mechanical) - Wikipedia. Simply, it âbearsâ the weight. Without a bearing, the wheel would rub through the axle - bearings spread the load and make the wheel spin freely.