Class project - adapter for small motor

[Travelover]

OK, this is really off topic. I need to adapt 20 plastic propellers to fit a small electric motor shaft. The hole in the propeller is about 6 mm and the motor shaft is about 2mm.

This is for a 4th grade class studying electricity, motors, etc. The propeller fit doesn't have to be dead accurate, but I don't want to embarrass myself, either.

I'd rather not wrap tape around the shaft, so I'm looking for other creative ideas.

Thanks in advance.

 

[forgeblast]

hot glue?

 

[Thomas]

I might need glasses,but it looks like blade will hit motor if fasten??..also motor shaft smaller than blade housing,if so than adapater shall be needed.

 

[Gryantaylor]

OK, this is really off topic. I need to adapt 20 plastic propellers to fit a small electric motor shaft. The hole in the propeller is about 6 mm and the motor shaft is about 2mm.

This is for a 4th grade class studying electricity, motors, etc. The propeller fit doesn't have to be dead accurate, but I don't want to embarrass myself, either.

I'd rather not wrap tape around the shaft, so I'm looking for other creative ideas.

Thanks in advance.

How about using a prop adapter:
Prop Adapter

 

[teg]

Fill the propeller hole with epoxy (PC7?), then drill after it sets up...

 

[banzai runner]

I second forgeblast's suggestion, quick and easy. You might also consider a 2-part quick-setting epoxy, but don't let it run into the motor.

- Doug

Edit addition: Hah! I see Teg beat me to it with a post while I was typing

 

[BillBeyer]

Never tried to find rubber tubing this size but someone may make it. 5/64 ID with 15/64 OD, glue onto motor shaft and glue propeller on tubing. Have seen 1/8 ID at automotive supply. Don't know if they have smaller or not.

 

[forgeblast]

not sure if i would use the bullet idea. I can hear it now. we used bullets in class today!!, plus the lead issue, osha would have a field day.

 

[SandburRanch]

For an economy solution, as most class rooms need, make bushings by boring a 2mm hole in a 6mm (1/4") wooden dowel and cut to length with a coping saw. 4th graders are old enough to learn coping saw techniques.

If the fit is a little loose a dab of epoxy could be used or a few drops of water may swell the wood enough to temporarily tighten the fit. Or use water on some and epoxy on some. I can see all sorts of things 4th graders can learn from this.

 

[Travelover]

OP here.

Well, I got really lucky. Looking through my junk box, I found a piece of plastic tubing. I found that if I cut off a 1/4" piece then stuffed it into the propeller hub hole, it compressed the center enough so that it is a slight press fit onto the motor shaft.

Thanks for all the creative suggestions. Now my wife is gonna be happy with me.