Drum Motors for Mining and Aggregate Applications Requiring High Power Conveyor Drives The rugged design of the Van der Graaf drum motor is ideal for the harsh and abrasive environmental conditions of the mining and aggregate handling industry. The drum motor encloses all moving parts within an oil bath that prevents dust and grit from wearing out key components. The benefit of this design eliminates the maintenance required on conventional exposed conveyor drives. • Engineered for Harsh Abrasive Environments • Lower Energy Costs • No Maintenance • Up to 300 HP