Big Buster PF Pneumatic Vibrators are ideal for the toughest applications. From unloading railcars to moving materials in huge bins and hoppers (over 150,000 lbs.) — there's a VIBCO Big Buster that can do the job.  VIBCO Big Buster PF Vibrators provide high force and low frequency and are designed for continuous duty; lubrication is required. Precise speed control allows "tuning" of the vibrator so you can achieve the best possible results. Big Buster vibrators are available with a clamp-on base for portability and a bolt-on base for permanent mounting.