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Nitralloy

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Tim Richards20/05/2014 17:26:02
7 forum posts

Hi can any one tell me if there is a alternative metal to use than nitralloy for making a crankshaft for model engine, or can any one let me know where I can buy some

thanks. Tim

JasonB20/05/2014 17:28:31
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25215 forum posts
3105 photos
1 articles

Can you say what sort of engine and scale though it does sound like you are looking towards a small IC engine so maybe EN24T.

Edited By JasonB on 20/05/2014 17:36:19

Tim Richards20/05/2014 18:00:21
7 forum posts

It will be know more than 3.5cc. Diesel or glow

many thanks. Tim

JasonB20/05/2014 18:16:21
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25215 forum posts
3105 photos
1 articles

If its just for the odd run for fun rather than keeping your prize plane in the sky then you could get away with EN8, thats what I used for the Firefly 0.46 glow and thats still in one piece after a few 8000rpm runs.

Roderick Jenkins20/05/2014 20:10:38
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2376 forum posts
800 photos

Tim,

On both the 10cc glow engines I've made I used large bolts as a source for crankshaft material. They tend to be tougher than mild steel but still machine quite nicely and of course they have the head already upset to make the crank web. I used a pressed in crankpin.

Cheers,

Rod

Rik Shaw20/05/2014 21:33:32
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1494 forum posts
403 photos

Tim

Fabricating small crankshafts and other stressed components can be machined from high tensile fixtures particularly large diameter stuff of the older variety manufactured in this country.. (There is a lot of modern stuff manufactured in places like China which is so inferior) Socket head / caphead screws of domestic manufacture are favourite sources of this material and car boot sales are a brilliant place to find the good stuff.

Rik

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