The Series of Immersion Concrete Vibrators produce high frequency vibration allowing for the efficient compaction of low slump concrete mixes. The epicyclical design of the vibrator range generates high frequency vibration with a low flex shaft speed, the low speed of both the flex shaft and vibrator motor results in longer service life. The rotor generating the vibration is supported by a heavy duty self-aligning bearing and executes a pendulum motion. Vibration is greatest at the tip of the vibrator head.