Finish Rates Of Feed Information below should be used as a guideline - results may vary The finish of your material is dependent on the feed and speed of your machine. No matter how good the quality of your cutting tool is, if you have the incorrect speed and feed then your cutting tool will fail. Signs of incorrect feed and speed rates include burning and high heat (causing the knives to dull quickly). (R.P.M. x No. Knives)/(Ft. Per. Min. x 12) = Knife Marks Per Inch R.P.M. Knife Marks Per Inch Number of Knives Cutting 1 2 4 6 8 10 12 14 16 3,600 10 30 Ft./Min 60 Ft./Min 120 Ft./Min 180 Ft./Min 240 Ft./Min 300 Ft./Min 360 Ft./Min 420 Ft./Min 480 Ft./Min 12 25 50 100 150 200 250 300 350 400 14 21 42 85 128 171 214 257 300 342 16 18 37 75 112 150 187 225 262 300 18 16 33 66 100 133 166 200 233 266 20 15 30 60 90 120 150 180 210 240 4,800 10 40 Ft./Min 80 Ft./Min 160 Ft./Min 240 Ft./Min 320 Ft./Min 400 Ft./Min 480 Ft./Min 560 Ft./Min 640 Ft./Min 12 33 66 133 200 266 333 400 466 533 14 28 57 114 171 228 285 342 400 457 16 25 50 100 150 200 250 300 350 400 18 22 44 88 133 177 222 266 311 355 20 20 40 80 120 160 200 240 290 320 6,000 10 50 Ft./Min 100 Ft./Min 200 Ft./Min 300 Ft./Min 400 Ft./Min 500 Ft./Min 600 Ft./Min 700 Ft./Min 800 Ft./Min 12 41 83 166 250 333 416 500 583 666 14 35 71 142 214 285 357 428 500 571 16 31 62 125 187 254 312 375 457 500 18 27 55 111 166 222 277 333 388 444 20 25 50 100 150 200 250 300 350 400 7,200 10 60 Ft./Min 120 Ft./Min 240 Ft./Min 360 Ft./Min 480 Ft./Min 600 Ft./Min 720 Ft./Min 840 Ft./Min 960 Ft./Min 12 50 100 200 300 400 500 600 700 800 14 42 85 171 257 342 428 514 600 685 16 37 75 150 225 300 375 450 525 600 18 33 66 133 200 266 333 400 466 555 20 30 60 120 180 240 300 360 420 480 8,000 10 66 Ft./Min 133 Ft./Min 266 Ft./Min 400 Ft./Min 533 Ft./Min 666 Ft./Min 800 Ft./Min 933 Ft./Min 1,066 Ft./Min 12 55 111 222 333 444 555 666 777 888 14 47 95 190 285 380 476 571 666 761 16 41 83 166 250 333 416 500 583 666 18 37 74 148 222 296 370 444 518 592 20 33 66 133 200 266 333 400 466 533 10,000 10 83 Ft./Min 166 Ft./Min 333 Ft./Min 500 Ft./Min 666 Ft./Min 833 Ft./Min 1,000 Ft./Min 1,166 Ft./Min 1,333 Ft./Min 12 69 138 277 416 555 694 833 972 1,111 14 59 119 238 357 476 595 714 833 952 16 52 104 204 312 416 520 625 729 833 18 46 92 185 277 370 462 555 648 740 20 41 83 166 250 333 416 500 583 666