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| Re-attaching fan blade |
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| Tinkering_Guy:
I have a 10" blower fan from an old computer that really pushes the air (about 250 CFM). Unfortunately, one of the plastic blades has snapped off as shown in the really piss-poor photo. I'm wondering whether this is something I can successfully repair with JB Weld (the blades spin at 1600RPM), or whether I might be able to make a completely new blade assembly, or whether I should just give up on it as anything other than a motor. Any thoughts? |
| Bernd:
Looks like a pretty clean break. I'd try some 5 minute epoxy. Might be a bit out of balance, but a little bit of filing would help bring it back into balance. Bernd |
| DMIOM:
It might also be worth stitching or stapling it with some copper wire Dave |
| Tinkering_Guy:
It's high-impact plastic, so 'stitching' it would involve some pretty fine drilling tasks. However, doing something like that to keep the blade from shrapnelating if the join ever gave way would be a good idea. Thanks! |
| Dean W:
For a fan that spins at 1,600 rpm, I would stick to just gluing it. JB Weld is good, strong stuff, and not very dense. File off the excess to try to maintain some balance, as Bernd suggests. I think if you started adding much weight, even a little bit, as you would in stitching to any one blade, it will soon start to vibrate quite a bit. The safe thing would be to get a new fan, you know. It's great to fix things though! Making a new fan blade is surly possible, but again, balancing something 10" in dia for even that relatively low speed might be beyond casual machining methods. I'm a believer in the 'anything can be done' mantra. Just depends on how much time and money you want to throw at it. Heck, I fix stuff out of pure meanness, sometimes. Dean |
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