
A two-groove SPA V-belt pulley with web, hub, keyed bore, and two M8 tapped set-screw holes on the round hub face, one placed over the keyway. The grooves are a Revolution and Groove feature you can re-edit, not a frozen solid.
SPA pulley, 2 grooves, PCD 200, 14 mm web, hub 56 mm diameter 60 mm long, 28 mm bore with keyway, two M8 set screws in the hub, one over the keyway and one at 90 degrees, 10 mm from the top of the hub.

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.
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.

A 36-tooth GT2 pulley with a raised hub, keyed 8 mm bore, and an M3 tapped set-screw hole placed over the keyway on the round hub face.
GT2 timing pulley, 36 teeth, 7 mm face width, 8 mm bore with keyway, hub 18 mm diameter 8 mm high on top, M3 set screw in the hub over the keyway.

A left-hand helical gear generated from module, tooth count, and helix angle, with the tooth profile and bore as separate editable features.
Helical gear, 24 teeth, module 2, 20 degree helix angle, left hand, 20 mm wide, 12 mm bore.

A 60-tooth internal ring gear with six mounting holes on a bolt circle, the base part of a planetary gearbox.
Internal ring gear with 60 teeth, module 1.5, outer diameter of the ring 110 mm, 12 mm thick, six 4 mm mounting holes on a 102 mm PCD.

A multi-flange bracket with different heights and thicknesses on each side, showing the generator handling a longer prompt with several linked features.
Create a mounting bracket for a motor. Base plate 120x80x10 mm. Two vertical flanges on longer edges, one 50 mm high with 10 mm thickness and other 30 mm high and 15 mm thickness. 2 holes (6 mm) on each top face of each flange.

A flat plate with corner holes and a center slot as separate pocket features, each one independently editable on the tree.
A flat mounting plate, 70mm x 40mm, 4mm thick, with four corner bolt holes and a center cutout slot

A simple flat bracket with two bolt holes, built as a real Sketch, Pad, Pocket tree in FreeCAD and editable after download.
A mounting bracket with two bolt holes, 60mm wide, for attaching a sensor to a flat panel

A small pad-and-pocket standoff, generated with the same editable structure as the larger parts.
A cylindrical standoff, 15mm diameter, 25mm tall, with a 4mm through-hole for a screw

The simplest example of the Sketch, Pad, Pocket pattern ChaordCAD generates: one block, one hole.
A rectangular spacer block, 40mm x 40mm x 10mm, with a single center through-hole for an M4 bolt