Many plastics (Nylon, Teflon, Plexiglas, etc..) are extremely workable with  industrial tooling machinery  same way  as metallic materials. For this propriety they are often worked as semi-finished components (rods, angles, plates, etc. ) from which  the  finished products (eg.  bushings, rollers, rings, pins, wheels) are obtained by machining.

Most common plastics  processing:
Injection moulding, extrusion moulding, blow-moulding and thermoforming.