Nitralloy

[Tim RichardsParticipant @timrichards40832]

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

[Tim RichardsParticipant @timrichards40832]

[JasonBModerator @jasonb]

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 RichardsParticipant @timrichards40832]

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

many thanks. Tim

[JasonBModerator @jasonb]

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 JenkinsParticipant @roderickjenkins93242]

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 ShawParticipant @rikshaw]

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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