Question:  

What size fan pole fits the PMB pole-mount bracket?

Answer:

The PMB pole mount bracket is made for two diameters of poles.  The PMB comes with a “Pole Bushing" that adapts between the two sizes.  In the US, ceiling-fan down rods are standardized.  Without inserting the pole bushing, the PMB works with down rods that are referred to in the US as ¾-inch down rods.  With the pole bushing in place, it fits down rods that are called ½-inch.  These US sizes refer to the “Inside Diameter" (ID) of the pole.  For outside the US, or for using with poles that aren't standard ceiling-fan down rods, the “Outside Diameter" (OD) of the rod is the relevant measurement.  In general, the outside diameter (OD) of ¾" down rods range from about 24 mm (0.94 inches) to 26mm (1.04 inches).  The outside diameter (OD) of ½" down rods range from about 18mm (0.708 inches) to 21mm (0.83 inches).  Poles with these outside diameters (OD's) fit the PMB, however it is the responsibility of the installer and system-designer to ensure that the selected pole fits properly with the PMB to ensure the safety of the installation and that it -- and all aspects of the installation -- meet all applicable code requirements.  If there is any doubt, confer with a licensed PE or rigging professional.​