Bushings are steel precision ground.

Many different sizes available.

(A) indicates thickness of bushing. (D) is the outside diameter needed and (d) as the inside diameter needed.

Thickness of bushing varies based on diameter of blade. An average bushing 1″ to 5/8″ would be .075″+/- or 5/8″ to 1/2″ would be .055″+/-.