Roller Vibrators

RTI S.r.l.’s roller vibrators generate thrust via a roller that, driven by compressed air, rolls along two tracks made of heat-treated steel. As with ball-type models, the presence of friction—albeit of the rolling type—between the metal parts makes it advisable to use lubricated air, thereby extending the vibrator’s service life.

However, lubrication is not mandatory: roller vibrators can also operate with dry or partially contaminated air. Under such conditions, however, mechanical wear and noise levels increase over time.

From a functional standpoint, the rotor’s shape does not allow for optimal utilization of air thrust. Added to this is the limitation posed by the clear opening between the roller and the housing, which allows a high volume of air to pass through. The result is overall low efficiency—even lower than that of ball-type models—with higher air consumption and noise levels.

In practical terms, roller vibrators are capable of achieving fairly high operating frequencies and vibration forces. However, it is important to note that their performance is significantly affected by the applied load, a factor that must be carefully evaluated during the selection process.