Brute Force Vibrating Feeders are a good solution for many applications. Brute force or single mass drive refers to a style of vibratory equipment where the one mass (a trough) has the motor(s) mounted directly to it. 100% of the vibratory action required to move the unit is generated from the unbalanced wheel force. Simple construction, easy to understand, the vibratory feeders are a good fit for many installations.