I have a job coming soon where I will have to do alot of slotting in .5" thick 4340 annealed plate. I dont have alot of experiance in cutting steel so I am looking for some advise picking the best end mill to purchase for the job. I have to cut 50 2"x3" parts out of a .5" plate. I will slot around the profile of the part .25" and then flip the part and slot the other .25". I will most likel use a 3/8" or 1/2" EM.
My mill is Fadal TRM 5hp, 4000rpm max spindle speed, no coolant just an air blast.
I looked around a bit and found some good reviews on variable flute endmills from SGS and Hanita. How would these compare to a solid carbide rougher in terms of depth of cut and speed? I have not used either style so I have nothing to compare them to. I am not conserned with the finish since I will make a finish pass with a different tool. I am more curious which tool will remove material faster a variable flute EM or a Roughing EM. Any help would be appreciated.