Ball bearing hinges may also have two, three or five knuckles.They differ from plain bearing hinges in that they have a steel ball bearing, or buffer, in between the knuckles. Heavy-duty ball bearing hinges have bearings between every knuckle. These units tend to be durable, better performing and less noisy than standard hinges.
Standard hinges should be used only on residential and light-duty commercial applications. They are usually not the best option for an entrance door or for any openings that are used frequently. They work well on temporary doors or lightweight storage and closet doors. For commercial applications, ball bearing hinges are almost always the best option.