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Im using a 1 3/4 end mill to surface a piece of thick aluminium. What RPM should the Jet Mill be at?

I am curious as to what speed to run a 1 3/4 " end mill when surfacing a piece of aluminum round stock. I have been cutting at around 2300 RPM and removing about .0300-.0500 " each pass but my piece and tool are noticeably hot ( im cooling with an oil/water mixture at the point of contact) any suggestions? Thanks ahead of time for your answers!!!

Are you using an HSS tool or carbide?

For aluminum, cutting speed (CS) for an HSS tool should be about 600fpm and 2820fpm for Carbide.

RPM = CS * 4 / dia

For HSS, RPM = 600 *4 / 1.75 = 1370
For Carbide, RPM = 2820 *4 / 1.75 = 6450

CNC Live Tooling Nakamura Lathe Mill Square

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