[R-390] R390(A) Gear Chemistry Questions

[Charles Steinmetz]

Glenn wrote:

> Does anyonereally know the actual chemistry involved in the manufacturing of thealloys used in those gears

360 Brass is used almost exclusively for gears like those.  It is very 
strong and wears well (due in part to a small percentage of Iron), 
corrosion-resistant (due to the high Zinc content), and is easily 
machined (due in part to a few percent Lead).

I cannot say with certainty that's what they used, but the  physical 
characteristics of the gears (and the bushings) are certainly consistent 
with 360, and it would have been an almost automatic choice for a 
mechanical designer.

Best regards,

Charles