Three-step cone pulley
Three A-section pulley steps stacked on one hub with a keyed bore through all of them. The kind of speed-change pulley a small shop builds for a drill press or lathe drive.
Prompt used
Three-step cone pulley for an A section belt: 200, 150 and 100 mm pitch diameters stacked on one hub, 25 mm bore with keyway through all.
Generated as shown, no manual cleanup.