EN8?

EN8?

This topic has 3 replies, 2 voices, and was last updated 11 October 2013 at 18:46 by Peter Bell.

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11 October 2013 at 15:30 #29494
Peter Bell
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@peterbell11509
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11 October 2013 at 15:30 #132373
Peter Bell
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@peterbell11509
Hi,

I am making a starter motor for an engine without a ring gear using a belt drive around the flywheel. Basically a stater pinion (approx 2" dia) meshes into a nut on an alternator shaft which is cnced out to allow the pinion to enter and turn the pully, belt and engine. I have the prototype working quite well but only using mild steel for this nut. As the pinion is hard and tough I want to make the drive nut from a better steel but it needs to reasonably easy to machine.

Anyone any suggestions regarding material, EN8 springs to mind or is there a better alternative even if I need to heat treat i?

Sorry for poor descrition and no pics as job not at home.
11 October 2013 at 17:03 #132383
ronan walsh
Participant
@ronanwalsh98054
What thread form will the nut be ? Any of the engineering steels (en19t en24t) are ok to turn and thread and are very tough.
11 October 2013 at 18:46 #132394
Peter Bell
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@peterbell11509
The thread is M16 x 1.5 which I think is conduit and probably why I have a tap. Do the engineering steels suggested have any work hardening properties?

Thanks
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