The floating, compliant drum makes the DC machine unique. By departing from the standard wide-belt design, the drum allows for more effective burr removal and processing of warped parts.

The drum floats pneumatically to follow the rise and fall of warping common to mild steel. Since the drum does not need to hold the abrasive under tension, like a wide belt, the drum can be softer. Softer contact focuses the grinding force on the edges of the part and maximizes burr removal without wasting abrasive on the part surface.