The garage door side hinge is produced from galvanized steel or black steel,then zinc plated.And we could also do powder coating for the surface treatment.We use the automatic punching machine to make the parts of hinge, and then assemble the parts together.

How to control the quality of the sectional garage door hinge?We would choose the best steel material with good Physical Properties,and when we do the surface treatment of zinc plate, we would control the thickness of plating which would guarantee the garage door hinges would not rust easily,it is the most important for our products.