Milling Stainless Steel With Hss

High efficiency milling can be a very effective machining technique in stainless steels if the correct tools are selected.

Milling stainless steel with hss.

Calculate the rpm setting to perform this cutting operation. A 3 4 inch hss drill is used on a piece of leaded 11l17 steel with a brinnel hardness of 100. Traditionally high speed steel hss tools have been used for drilling and reaming but carbide tipped tools are also used for specialised jobs or long production runs. Cutting speed 50 fpm diameter of cutter 1 00.

Hss twist drill recommended speeds and point angles. This article gives suggested feeds and speeds for drilling and reaming taken from the bssa stainless steel specialist course training note no9 machining stainless steels. Chipbreaker roughers would make an excellent choice in either 5 or 7 flute styles while standard 5 7 flute variable pitch end mills can also perform well in hem toolpaths. Recommends sfm feed rates and point angles for hss twist drills for various workpiece materials.

Free machining plain carbon steels resulfurized 1212 1213 1215. Stainless steel 200 300 series. Machines should not be prone to excessive vibration in the machine bed drives and gear boxes or at the cutting tool or its mountings. Stainless steel 400 series and ph.

Gray cast iron 180 hb. Recommended cutting speeds in feet per minute for turning milling drilling and reaming ferrous cast metals. In solid carbide drills microcracks can form on the cutting edges which will eventually cause the drill to fail. And hb brinell hardness number.

When you machine stainless steel you are generating high temperatures explained scott turner marketing manager holemaking seco tools. In high speed steel hss drills this heat will cause the tool to lose its hardness. Small training or hobbies lathes and milling machines intended for machining mild steel brasses etc. Q and t quenched and tempered.

Speeds for turning based on a feed rate of 0 012 inch per revolution and a depth of cut of 0 125 inch.