ChinaGearSuppliers The most common brass gears is the samll brass spur gear, like M0.5 M0.8 M1. normally聽used on toy, motor or gearbox etc miniature parts,聽brass gears have the advantages of good strength and durability, relatively soft hardness, and shaking transmission comfort. The common hole type for brass gears are round type hole and D type hole, round type hole is more聽 common beacuse is...