Gear housing (casing,
gearbox) is an important part of the reducer. It is the base of transmission parts with enough strength and stiffness. There are welding
(fabrication) gear box housing which is applied in piece production, simplified techniques and lowering the cost and cast-iron gear box housing which is applied in mass production with fine castability and damping property.
Materials with GG20 GG40 Q235 and so on.