Technical Information for Thread Milling Technical Information for Thread Milling RECOMMENDED SELECT FORTHREAD MILLING Mill-Thread Inserts Speed and Feed Selection Spiral Finish Mill-Thread Inserts Speed and Feed Selection Sub-Micro Grade with Titanium Aluminum Nitride multi-layer coating(ISO K10-K10). This is a Sub-Micro Grade with Titanium Aluminum Nitride multi-layer coating(ISO K10-K10). This is a TTIM45 general purpose grade, which can be used with all materials; It should be run at medium to high TTIM45 general purpose grade, which can be used with all materials; It should be run at medium to high cutting speeds. cutting speeds. ISO Materials Cutting Speed (m/min) Feed Rate (mm) ISO Materials Cutting Speed (m/min) Low and Medium Carbon Steels 115-280 Low and Medium Carbon Steels 200-330 P High Carbon Steels 130-200 P High Carbon Steels 170-235 Alloy Steels, Treated Steels 105-180 Alloy Steels, Treated Steels 100-195 Stainless Steels 130-190 Stainless Steels 180-230 M M Cast Steels 150-190 Cast Steels 180-230 0.05-0.15 Cast Iron 80-170 Cast Iron 200-350 Non-Ferrous and Aluminum 180-340 Non-Ferrous and Aluminum 500-1100 N N Synthetics, Duroplastics, Thermoplastics 115-460 Synthetics, Duroplastics, Thermoplastics 400-1500 s Nickel Alloys, Titanium Alloys 25-90 s Nickel Alloys, Titanium Alloys 30-55 091 Spiral Mill-Thread Inserts Speed and Feed Selection 092 Sub-Micro Grade with Titanium Aluminum Nitride multi-layer coating(ISO K10-K10). This is a TTIM45 general purpose grade, which can be used with all materials; It should be run at medium to high cutting speeds. ISO Materials Cutting Speed (m/min) Feed Rate (mm) Low and Medium Carbon Steels 145-360 P High Carbon Steels 165-255 Alloy Steels, Treated Steels 135-230 Stainless Steels 165-245 M Cast Steels 190-245 0.05-0.15 Cast Iron 100-220 Non-Ferrous and Aluminum N Synthetics, Duroplastics, Thermoplastics 230-440145-590 s Nickel Alloys, Titanium Alloys 30-115 As you may note, cutting speed is shown in range terms. In most standard cases choosing a speed in the middle of the range would be a good choice for a start. For hard metals reduce cutting speed.