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Recommend a material type for gear set.

Recommend a material type for gear set.

Recommend a material type for gear set.

I have an aluminum gear from an old instrument that has worn down. I would like to reverse engineer a new gear using a higher strength material, however, I have a concern about the mass moment of inertia of the new gear. If I use steel, the mass will triple and I don't think the motor can handle it. What is a common material that gear manufacturers use that weighs about the same as aluminum with the strength of moly-steel? Beryllium is out due to the hazards. Is titanium realistic?

RE: Recommend a material type for gear set.

Not sure if you want to consider alternatives to your question. But if you are look below.

You might want to consider a different type of aluminum. Or if the instrument is old maybe it is better to just purchase a replacement.

RE: Recommend a material type for gear set.

How about using steel and use a webbed gear blank. The steel is so much stronger than the aluminum that you can drastically reduce the volume of material. This approach may not get you all the way down to the inertia of the aluminum but may get you close enough. Titanium is hard to machine and, without expensive techniques, hard to get a good quality gear.

RE: Recommend a material type for gear set.

You did not define the aluminum type or grade, 5000 series,
6000 series, or 7000 series.  They do vary considerably.
How long was this is service?  

RE: Recommend a material type for gear set.

hi! give a drawing of the gear to everybody here and
 you can have more accurate answers. hurry up!!
   regaaards   keraamat

RE: Recommend a material type for gear set.

I agree with the

RE: Recommend a material type for gear set.

Why not use a hard anodize coating on an aluminum gear?

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