When using a journal or sleeve bearing, the shaft should be softer than the bearing material in order to minimize bearing wear.

Journal Bearings

Journal bearings are a type of plain bearing that support radial loads by enclosing the shaft along its length, offering a smooth, lubricated surface for the shaft to rotate within.

Sleeve Bearings

Bearings consisting of a cylindrically shaped liner that allows for relative motion by sliding, used in various machinery for rotational or sliding movements.