Video: High Feed Milling in Aluminum
Footage shows roughing at 48 cubic inch per minute on a standard-speed machining center.
This video shot by Boeing St. Louis shows a 4-flute, 2-inch-diameter high feed mill from Iscar machining aluminum at 0.080 axial depth of cut and 300 ipm for a metal removal rate of 48 cubic inches per minute. Boeing often recommends the use of high feed milling as part of a strategy for making efficient use of lower-rpm machining centers. For more, see the article under “Editor Picks” at right.
Consider these alternatives when conventional drilling can't do the job.
To make the transition to hard turning, you'll need to switch from carbide to CBN inserts, but that is easier (and more economical) than you might think. It's making the jump to much higher surface speeds that might scare you off. It needn't. Here's why.
One of the most common methods of tapping in use today on CNC machines is 'rigid tapping' or 'synchronous feed tapping.' A rigid tapping cycle synchronizes the machine spindle rotation and feed to match a specific thread pitch. Since the feed into the hole is synchronized, in theory a solid holder without any tension-compression can be used.