Operating a drum motor without a belt: NB (no belt) series motor is required for preventing overheating. (Refer to: Cooling)

Operating a drum motor with a modular belt driven with sprockets: NB (no belt) series motor is required. (Refer to: Driving modular belt driven by sprockets)

Operating a drum motor in a vertical position or 5° horizontal position and higher: For these applications extra oil will be required. (Consult your Van der Graaf representative.)



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