Do not use ordinary pipe to replace standard pipe supplied by the manufacturer. It may not withstand high load or torque created and can cause material failure. E.g.. Conduit pipe.
Standard pipe supplied by factory:
Black pipe grade A
Inside diameter 17.0mm
Manual drilling of pipe can cause hole slanting. If it happens, fan will be wobble and in the worse condition the bolt will worn out.
The bolt and nut must be tightened firmly. If it is not fully tighten, the bolt will easily worn out due to torque action during each starting action.
Do observe this installation condition that could lead to poor performance.
