211 866-888-9600 gorillamill.com SPEEDS & FEEDS HIGH PERFORMANCE 4 FLUTE NECK RELIEVED (INCH) 4 FLUTE NECK RELIEVED (INCH) COATED SPEEDS & FEEDS CHART. 1/2X DIAMETER DEEP, FULL SLOTTING, CHIMP LOAD PER TOOTH WORK PIECE MATERIAL SFM 1/4" 3/8" 1/2" 5/8" 3/4" 1" RPM IPM RPM IPM RPM IPM RPM IPM RPM IPM RPM IPM Gray Cast Iron 450 6,876 32.9 4,584 31.1 3,438 34.4 2,750 33.1 2,292 32.0 1,719 27.5 Ductile Iron 375 5,730 20.6 3,820 24.8 2,865 26.3 2,292 27.6 1,910 26.5 1,433 24.3 Soft Steels, (A36,1018, 8620,1045) 480 7,449 29.8 4,966 29.8 3,725 31.3 2,979 32.2 2,483 31.8 1,862 29.8 Alloy Steels, (4340, 4140) 300 4,584 18.3 3,056 22.0 2,292 22.0 1,833 20.5 1,528 20.7 1,146 18.3 4140 Pre-Hard (28 to 32 Rc) 225 3,641 11.6 2,292 12.8 1,719 13.7 1,375 13.7 1,146 13.7 860 12.1 Tool Steels (A2,D2,S7) 225 3,438 11.0 2,292 14.7 1,719 15.2 1,375 14.3 1,146 13.7 860 12.4 Die Steels, (H13,P20) 245 3,725 16.4 2,483 19.8 1,862 18.6 1,490 16.7 1,241 16.9 931 14.9 Stainless Steel, (303, 304, 316) 260 4,011 12.8 2,674 17.0 2,006 17.6 1,604 16.7 1,337 17.0 1,004 14.9 Difficult Stainless Steel, (400 & PH Series) 225 3,438 9.6 2,292 10.4 1,719 13.8 1,375 13.8 1,146 13.8 860 12.1 Stainless Steel (13-8) 115 1,719 4.8 1,146 5.9 860 8.9 687 7.7 573 7.6 430 7.0 High Temp. Alloys 190 2,865 8.0 1,910 10.7 1,433 10.9 1,146 10.1 955 10.7 716 9.5 Titanium (6AL4V) 150 2,292 6.1 1,528 9.8 1,146 10.6 917 10.0 764 9.8 573 9.2 Inconel 718 115 1,776 5.0 1,184 6.2 888 7.1 710 6.5 593 7.1 444 6.2 Inconel 625 100 1,547 4.4 1,031 5.3 773 6.5 619 6.5 515 6.8 386 6.2 *NOTE: Recommended Speeds & Feeds meant for shortest reach tools. CLICK HERE FOR ONLINE SPEEDS & FEEDS CALCULATOR
2024 Gorilla Mill Spring Catalog
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