I'm pretty new to milling and I'm trying to double check my feeds and speeds calculations.
Can someone tell me if the following speeds and feeds are within acceptable ranges with regards to load and safety for a 1 1/2 hp 2J varispeed head bridgeport?
I looked it up in Machinery's handbook and as far as I can tell the feed rate might be slow but the RPMs look fine. But I'm worried I might be missing something.
Cutter = shell mill plain carbide inserts Cutter diameter = 3 inches Number of teeth = 6 Material = 7075 aluminum 1.5 inch wide Width of cut = 1.5 inches centered on cutter Depth of cut = .1 SFPM = 942 RPM = 1200 Feed per tooth = 0.0021 Feedrate = 15 ipm Thanks, Paul