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Old Jan 08, 2010, 07:37 PM
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Question
How to mount a 4mm prop on a 3mm shaft?

I would like to adapt a boat prop (probably a Gaupner 40mm diameter intended for a 4mm shaft) to an aircraft 3mm shaft, any suggestions on an easy / cheap way to do this? I was thinking along the lines of a very thin brass shim, but I don't know where I might find .5mm thick brass cheaply/easily. Any other ideas?
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Old Jan 08, 2010, 08:12 PM
no wings any more, just dust!
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gobs it wont work. time for a new shaft, they're not that expencive $10 for a 12" shaft
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Old Jan 09, 2010, 03:58 AM
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No, the shaft of the motor is 3mm and all the props I've found are for 4mm shafts and I want to mount the boat prop directly on the motor's shaft (or use as short an adapter as possible, this is going to be used in an ROV project BTW).
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Old Jan 10, 2010, 02:52 AM
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Shaft adapters

Try www.wmberg.com
in their on line catalog/products click on couplings then shaft adapters,choose metric first then under"type" choose shaft adapter the pdf file shows an adapter with a female 3.0mm i.d. and 4.0 male or o.d with a 11.0mm length stock 3SAM-10 If you don't go to the pdf file it shows 3mm X 3mm I don't know why. Is this what you need? It will also need clamps. they got them too. Good helpful people, products a little pricey not too bad.
Ted
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Old Jan 10, 2010, 08:15 AM
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Thanks, that's a great resource. You wouldn't happen to know where I can get plastic Graupner 3 or 4 blade 60mm props for a straight (no thread) shaft, would you? I used them in another project and would like to use them again in this one (so the parts would be compatible) but can't find them anywhere.
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