BLI Vibrator Shaft Needle Pendulum BNHD Steel TipThe Betonelli heavy duty concrete vibrator produces high frequency vibration which allows efficient compaction of low slump concrete mixes . The unique epicyclic design generates higher frequency vibration delivers results as well as longer service life . The rotor of the vibration is supported heavy duty self aligning bearings that produces superior pendulum motion that causes superior vibration at the tip of the vibrator head.