Hi Don,

I bought the Wicked 60mm EDF Fan Unit for my Alfa Mig-15.
The 3mm hole in the shaft adapter is a really tight fit past the other side of the grub screws. I ordered a 3mm drill bit and was getting ready to drill it out, but then I thought perhaps the motor shaft is designed to be press fit into the adapter past the grub screw holes, but if I did that, I would never get it off again.

So the question is should I drill out the hole so it will fit all the way down the motor shaft? I'm thinking it's either intentional for a press fit, or the drilling and tapping of the grub screw holes caused the tight fit.

Thanks,
Dave

Sometimes they come tight from the factory. You can drill it. You might just be able to spin the drill bit with your fingers as sometimes it is just a burr from the cross holes for the setscrew.

Don