RS PRO
RS PRO POM 18 Teeth Spur Gear, 0.5 Module, 3mm Bore Diam, 9mm Pitch Diam, 6mm Hub Diam
Part: 521-7017
Lightweight plastic spur gear with 18 teeth for quiet, low-friction machinery.
Igus
Igus Iguform S270 18 Teeth Spur Gear, 0.5 Module, 4mm Bore Diam, 9mm Pitch Diam, 7.8mm Hub Diam
Part: S270GM-ST-050-018-00-040-R
Precision plastic spur gear for small machinery and equipment drives.