Sinhal's coal strokers are of power & allied design prototype. There are endless articulate grate, driven forward at uniform rate by 3 hp motor through a suitable gear system, the rate being varied by a variable speed dc motor, coal is fed at one end of the grate, the thickness of the feed being regulated by a heavy duty refractory lined C.I fire door. Air for
combustion passes through spaces between the links, which are so arranged to provide adequate passage of air while allowing min. of riddings to pass through them.
The regualted layer of coal on the links, as enters the furnace/arch, is heated by the radiation from the furnace gases & the arch ignition. The fuel bed continues to burn as it moves to the rear end & as the combusion progresses the bed becomes thinner. At the end of the bed the ash is discharged into the ashpit as the link bed forming the grate surface passes over the rear roller.