Flat

Flat

    EDIFICIO PEÑA BLANCA en Alicante. PEÑA BLANCA Building, Alicante (kapoll) / CC BY-SA 3.0
Bearing

Bearing

              Large “Print-in-place” Ball Bearing (Ø145mm) (barspin) / CC BY-SA 3.0
Knurled Bolt

Knurled Bolt

    Knurling bolt and nut (akira3dp0) / CC BY 3.0
Bevel Gear

Bevel Gear

    Spiral bevel gear (GeneralRulofDumb) / CC BY-SA 3.0