Depending on the machine, there are different classifications of parts. Biomass Pellet Mill Parts include Ring Die, Lubricating Grease, Roller, Shaft, Safety Pin, Hoop, Gear; Biomass Hammer Mill Parts include Blade, Screen, Lubricating Grease; Biomass Chipper/ Crusher Parts include Screen, Blade.

Specialized machines make Kingwood's Roller Shells. The press rolls produced have the characteristics of high dimensional accuracy of the inner surface, low roughness of the mating surface, less runout of the outer circle to the inner-circle axis, and high cylindricity of the out-surface. Its stability in use is high, and its life expectancy has reached the leading level in China.