A few weeks ago the guy who keeps things running at work asked if I could help out with some fan blades on a coolant pump. The original blades were held on by a setscrew thru the side of the plastic hub. It kept coming lose and had chewed up the shaft.
I do not like setscrews even when they are not threaded thru a plastic hub so I designed some blades with a tapered bushing that would bridge the chewed part of the shaft and clamp on the better parts.
Original fan
Replacement and the tapered bushing
A little bit under extruded but it is working just fine.
I like it Andre!
It looks like your tapered solution has three screws that pull the taper deeper into the fan hub, correct? If so, that’s a great idea!
Very cool!
Yes, there are 3 hex counter bores in the bottom that I put nuts into. I was going to put a head on the bushing but I was running out of room and did not know if it would be thick enough so I just used a fender washer on top of the bushing, drilled three holes in it for the bolts to push the busing into the fan part.
I did not get a pic of it installed, job was late and we needed to get the lathe running.
It run very true and has not blown up yet, it is just ABS, I really should get something better for this kind of thing.
Thanks, but it really just blows.
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Oh it’s been a long day.
If you reversed polarity it would just suck. Badumbum. Ding.
Wow what a design and what a fantastic print! So this is just blowing air then? Probably a lot cheaper fix than using the original items! Well done Andre B
Yes it is the fan on the end of a TEFC (Totally Enclosed, Fan Cooled) motor, probably the most common type of motor you will find in a factory.
http://cfile2.uf.tistory.com/image/213B1F4054D0885234CF68
Ahh thanks for sharing 
How long has your modification been running for now?
