1 Mod 30 Teeth Blue Nylon Spur Gear Bore 5mm-15mm Pinion Plastic Gear with Step Bore:6.35mm a mismatched or brittle hose

a mismatched or brittle hose can cause leaks

A step bore means the gear hub has a two-diameter bore: a smaller inner bore for the shaft and a larger counterbore (the "step") that provides a shoulder for axial positioning

resists corrosion

Material Chrome Vanadium Steel (CrV) Finish Mirror-polished chrome Quantity 12 Pieces Sizes Included 8mm

1 Mod 30 Teeth Blue Nylon Spur Gear Bore 5mm-15mm Pinion Plastic Gear with Step Bore:6.35mm a mismatched or brittle hose1 Mod 30 Tooth Blue Nylon Spur Gear Lightweight Pinion for Precision DIY Drives When a noisy metal gear or an oversized pinion is slowing down your build, makers and engineers reach for a low backlash plastic alternative that won't strip under moderate loads. This 1 Mod 30 tooth blue nylon spur gear with a stepped bore is designed for hobbyists, robotics builders, and small machine designers who need a reliable, corrosion resistant drive component