Welding Positioner Compatible Workpiece Diameter (Maximum) 90 in Horizontal Load Capacity 9 900 lb Rotation Speed (Maximum) 8 RPM Compatible Workpiece Diameter (Minimum) 9.8 in Features AC Inverter Driven Conventional Style with Rubber Drive Wheels Dual Drive Wheels Dual Idler Wheels For Welding Polishing Glue-Lining and Assembling Self-Aligning Input Voltage 220V Phase Three Rotation Speed (Minimum) 1 RPM Weight 1 320 lb