Said to roller, and the will to a great extent, actually is also referred to as the drum, the comparison is applied widely in digital printers, such as rotary screen printing machine or for its mining transportation equipment, moreover, is roller device in paper or packaging machinery and other different kinds of drive transmission system and the application of sorting conveyor equipment is also will be more extensive.

Then, speaking of the requirements of the roller itself, in fact, the roller will have a better rigidity, so that it is in fact to a large extent under the action of the heavy load, in terms of its bending deformation is not more than a allowable value of itself.

In addition, speaking of the roller, in terms of its surface, it should have enough hardness, in general, in its own right is to pay attention to should be HRC50 degrees above, in this way, in a large extent, it will have a relatively strong corrosion resistance. For its coating that is, it should have a series of anti-spalling ability, to a large extent, it can directly guarantee the roller working surface that is, it will have better wear resistance and corrosion resistance.

Then, it is said that the working surface of the roller should be carefully processed, so that, to a large extent, it will ensure the size accuracy and surface roughness. For this point, we should pay attention to its roughness, which means that it should be above Ra0.16, and there should be no pores or grooves.

Later, on the surface of the roller wall thickness is to pay attention to maintain uniform, otherwise, on its to a large extent, in fact, it will directly make the roller surface temperature is not uniform, in a large extent, it will directly affect the quality of products. Said the roller material itself is to pay attention to have a better thermal conductivity.