IntroductionMaterials
UsedDesignsManufacturing
ProcessDoor
Knob By TypesDoor
Knob By MaterialsRelated
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Door Knobs
Introduction  Door
knobs can be considered as a type of door handle as it is used for
opening and closing a door. It is an essential part of the door hardware
that only provides the space to grab the door towards a side. The place
of installation of door knobs on a door may vary between a few
centimeters away from the edge of the door to the exact center of the
door. This mostly depends on the individual's choice as well the
decorative style. Generally, the distance from the edge of the door to
the center of the door knob is called the backset.Decorative door knobs may or may not have a locking option available with them. Majority of the modern or contemporary doors have door knobs that can be turned to operate a latching mechanism that usually holds the door closed. There are doorknobs which have a built-in locks in them. Materials Used Materials used for making door knobs are numerous. We can classify the door knobs on the basis of materials used in a following way
 DesignsAppearance, cost, and availability are the major considerations for selecting the Door hardware but for preparing durable knobs manufacturers are concentrating more on designs. While designing more and more attention is now given on size, shape, and feel of each element of door knobs to make them user friendly. Door knobs must have following design features:
There are several processes that are used for making door knobs. Process involved are: Forging Under forging process heated metal is put into dies under very high pressure. After ejection from the press door knobs, are cooled, trimmed to size, tempered, and cleaned to remove heat scale produced during the process. Through forging, door knobs of superior strength, toughness, reliability, and quality are produced. This process is economical and efficient. 
Door Knob after ForgingOnce shape is prepared, doorknob goes through a series of finishing steps. The process involved in this process are coining, milling, drilling, and tapping that produce surface ready for the polishing operation. Coating To provide extra protection to the knob, an organic or inorganic coating is applied by using various processes. Polyurethanes, acrylics, and epoxies are used in organic coatings. Organic coating however produces hazardous materials hence now manufacturers are applying inorganic coatings which are based on inert metals. Physical vapor deposition (PVD) or electroplating is used for this type of coatings. Types We can classify the door knobs on the following basis: Door Knobs By Types
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