A DK conveyor chain includes a framework, plus the names of the parts are stated within the drawing. These components have functions specified under.
Pins
Pins help all the load acting over the chain along with plates, and once the chain is engaged with the sprockets, they slide along with bushings as bearings. They are really topic to put on and especially should have large shear strength, bending strength and wear resistance. Hardened and tempered hard steel, carburized steel, or induction-hardened steel is made use of.
Rollers
Rollers protect the chain from shocks together with the sprockets, and once the chain is engaged with all the sprockets, the rollers bend the chain smoothly and act to lessen the resistance once the chain runs on a rail. They are needed to possess higher shock fatigue power, collapse power and dress in resistance. Hardened and tempered difficult steel, carburized steel or induction-hardened steel is employed.
Bushings
Bushings are positioned between pins and rollers and act as bearings for each the pins and rollers not to transmit the load obtained by the rollers straight on the pins once the chain is engaged with all the sprockets. They’re required to have high shock fatigue strength, collapse power and dress in resistance, 
and usually, carburized steel is employed.
Plates
Plates are topic to repeated stress of the chain and sometimes to large shocks. They are really necessary to have large tensile strength, and especially high shock strength and fatigue strength. High tensile steel is utilized for common chains and heat-treated alloy steel for heavy-duty chains.
T-pins
T-pins stop the outer plates from disengaging from the pins. They are really made from soft steel because pins are normally pressed-in the outer plates and so no large force acts to the T-pins.