Re: Gear blank curiosity


Gregg Eshelman
 

On 4/22/2015 2:04 AM, Edward Draper eddie.draper@btinternet.com [SOUTHBENDLATHE] wrote:


Forgot to mention - pinion wire for clocks is hard steel, and is run
against hard brass larger gears. Clock gears should NOT be lubricated,
as the grit attracted then acts as a grinding paste. Running dry, both
brass and steel work harden and resist wear (do not attempt this on your
lathe, car, etc!). Pivots are lightly lubricated.
Boston gear has pinion wire in steel and brass, 14.5 PA, 24, 32 & 48 DP.

I've seen gear toothed rod in larger sizes but only in 20 degree pressure angle.

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