Mm, or 38 mm based on standard IEC motor flange sizes. [1, 2]
RV 130 Hole and Shaft Specifications
Output hollow bore diameter: 45 mm (standard keyway 14 mm)
Input bore (worm hole) diameter: 24 mm / 28 mm / 38 mm (depending on motor flange)
Supported motor input power: 7.5 kW (up to roughly 10–15 HP max depending on duty cycle)