Aprilia gear material

[davidwheeler]

My fabled new bottom gear wore out in a few hundred miles die to being made of the wrong kind of steel.  Does anyone now where I might find the correct specification?

[phil-m]

You could do worse than use G.K.H.W by Aubert and Duval. It will not be cheap but it is one of the best steels you can get.

[davidwheeler]

A search of the Albert and Duval web site fails to find G.K.H.W.  What manner of steel is it?  The nearest I can find is GKH, a steel for nitriding with C Cr Mo.  It seems to have the highest ultimate tensile strength and yield strength.
David

[DavidLaver]

Picking the thread up at this point why did you not get the gear made by a gear maker?  They'd have stocks of the correct steels and be heat treating (and whatever) else appropriately day in day out.

David

[the.cern]

I'm a Civil Engineer, not a Mechanical Engineer, but I do think hardness rather than tensile strength may well be the criterion to check for here. David's suggestion to go to a gear specialist would seem to be a good start. You might get only  advice if they don't do 'one offs' but at least you'll have started the process. As a matter of interest, where did the specification for the material for the failed set come from.

Good luck with it and if you come across a good gear cutting specialist, please let us all know, the  people I used sold up in the eighties !!!!!

                       Andy

[Dilambdaman]

Neve Engineering - specialist gear cutting.

Not used them but heard good things about them.

http://www.neveengineering.co.uk/site/index.php

Robin.