| SAP Material Number | 2252794 |
| ISO Catalog Number | KFSR250OF6445M3 |
| ANSI Catalog Number | KFSR250OF6445M3 |
| [D1] Effective Cutting Diameter | 63.5000 mm |
| [D1] Effective Cutting Diameter | 2.500 in |
| [D1MAX] Maximum Cutting Diameter | 74.7000 mm |
| [D1MAX] Maximum Cutting Diameter | 2.940 in |
| [D] Adapter / Shank / Bore Diameter | 19.05 mm |
| [D] Adapter / Shank / Bore Diameter | .75 in |
| [D6] Hub Diameter | 54.4500 mm |
| [D6] Hub Diameter | 2.144 in |
| [L] Overall Length | 44.4500 mm |
| [L] Overall Length | 1.750 in |
| [AP1MAX] 1st Maximum Cutting Depth | 5.0000 mm |
| [AP1MAX] 1st Maximum Cutting Depth | .1969 in |
| Number of Inserts | 5 |
| Weight Pounds | 1.50 |
| Max RPM | 10100 |
Face Milling
Milling - Side and Face
Milling - Through Coolant| Material Group | Light Machining | General Purpose | Heavy Machining | |||
| (Light geometry) | – | (Strong geometry) | ||||
| wear resistance |  <="" td=""> | toughness | ||||
| Geometry | Grade | Geometry | Grade | Geometry | Grade | |
| P1–P2 | .E..LB | KCPK30 | .E..GB | KCPM40 | .S..HB | KCPM40 |
| P3–P4 | .E..LB | KCPK30 | .E..GB | KCPK30 | .S..HB | KCPK30 |
| P5–P6 | .E..LB | KC725M | .E..GB | KC725M | .S..HB | KC725M |
| M1–M2 | .E..LB | KC725M | .E..GB | KC725M | .S..HB | KC725M |
| M3 | .E..LB | KCSM40 | .E..GB | KCSM40 | .S..HB | KCSM40 |
| K1–K2 | .E..LB | KCK15 | .E..GB | KC520M | .S..HB | KCK15 |
| K3 | .E..LB | KC520M | .E..GB | KC520M | .S..HB | KC520M |
| N1–N2 | .F..LNJ | KC410M | .F..LNJ | KC410M | .F..LNJ | KC410M |
| N3 | .F..LNJ | KC410M | .F..LNJ | KC410M | .F..LNJ | KC410M |
| S1–S2 | .E..LB | KC725M | .E..GB | KC725M | .S..HB | KC725M |
| S3 | .E..LB | KCSM40 | .E..GB | KCSM40 | .S..HB | KCSM40 |
| S4 | .E..LB | KCSM40 | .E..GB | KCSM40 | .S..HB | KCSM40 |
| H1 | – | – | – | – | – | – |
| Insert Geometry | Recommended Starting Feed per Tooth (Fz) in Relation to % of Radial Engagement (ae) | Insert Geometry | ||||||||||||||
| 5% | 10% | 20% | 30% | 40–100% | ||||||||||||
| .F..LNJ | 0,17 | 0,67 | 1,20 | 0,12 | 0,49 | 0,86 | 0,09 | 0,36 | 0,64 | 0,08 | 0,32 | 0,56 | 0,07 | 0,29 | 0,51 | .F..LNJ |
| .E..LB | 0,34 | 0,75 | 1,20 | 0,25 | 0,54 | 0,86 | 0,19 | 0,40 | 0,64 | 0,16 | 0,35 | 0,56 | 0,15 | 0,32 | 0,51 | .E..LB |
| .S..LB | 0,34 | 0,73 | 1,33 | 0,25 | 0,53 | 0,96 | 0,19 | 0,39 | 0,71 | 0,16 | 0,34 | 0,62 | 0,15 | 0,32 | 0,57 | .S..LB |
| .E..GB | 0,34 | 0,87 | 1,40 | 0,25 | 0,62 | 1,00 | 0,19 | 0,47 | 0,74 | 0,16 | 0,41 | 0,65 | 0,15 | 0,37 | 0,59 | .E..GB |
| .S..HB | 0,34 | 0,87 | 1,49 | 0,25 | 0,62 | 1,07 | 0,19 | 0,47 | 0,79 | 0,16 | 0,41 | 0,69 | 0,15 | 0,37 | 0,63 | .S..HB |
| Light Machining | General Purpose | Heavy Machining |
| Insert Geometry | Recommended Starting Feed per Tooth (Fz) in Relation to % of Radial Engagement (ae) | Insert Geometry | ||||||||||||||
| 5% | 10% | 20% | 30% | 40–100% | ||||||||||||
| .F..LNJ | .007 | .027 | .048 | .005 | .019 | .035 | .004 | .015 | .026 | .003 | .013 | .022 | .003 | .012 | .021 | .F..LNJ |
| .E..LB | .014 | .029 | .047 | .010 | .021 | .034 | .007 | .016 | .025 | .006 | .014 | .022 | .006 | .013 | .020 | .E..LB |
| .S..LB | .014 | .029 | .053 | .010 | .021 | .038 | .007 | .016 | .028 | .006 | .014 | .025 | .006 | .012 | .022 | .S..LB |
| .E..GB | .014 | .034 | .055 | .010 | .025 | .039 | .007 | .018 | .029 | .006 | .016 | .026 | .006 | .015 | .023 | .E..GB |
| .S..HB | .014 | .034 | .059 | .010 | .025 | .042 | .007 | .018 | .031 | .006 | .016 | .027 | .006 | .015 | .025 | .S..HB |
| Light Machining | General Purpose | Heavy Machining |
| Material Group | KC410M | KC520M | KC522M | KC725M | KCK15 | KCPM20 | KCPK30 | |||||||||||||||
| P | 1 | – | – | – | – | – | – | 395 | 345 | 325 | 315 | 275 | 255 | – | – | – | 660 | 580 | 535 | 545 | 475 | 440 |
| 2 | – | – | – | – | – | – | 330 | 290 | 240 | 260 | 230 | 195 | – | – | – | 410 | 370 | 330 | 335 | 305 | 275 | |
| 3 | – | – | – | – | – | – | 305 | 255 | 215 | 240 | 205 | 170 | – | – | – | 370 | 330 | 305 | 305 | 275 | 250 | |
| 4 | – | – | – | – | – | – | 270 | 225 | 180 | 215 | 180 | 145 | – | – | – | 275 | 255 | 230 | 225 | 210 | 190 | |
| 5 | – | – | – | – | – | – | 225 | 200 | 180 | 180 | 160 | 145 | – | – | – | 330 | 300 | 275 | 310 | 275 | 255 | |
| 6 | – | – | – | – | – | – | 200 | 150 | 120 | 160 | 120 | 95 | – | – | – | 230 | 200 | 175 | 190 | 165 | – | |
| M | 1 | – | – | – | – | – | – | 245 | 215 | 200 | 205 | 180 | 165 | – | – | – | 270 | 240 | 205 | 250 | 220 | 190 |
| 2 | – | – | – | – | – | – | 225 | 190 | 160 | 185 | 160 | 130 | – | – | – | 245 | 215 | 190 | 225 | 195 | 170 | |
| 3 | – | – | – | – | – | – | 170 | 145 | 115 | 140 | 120 | 95 | – | – | – | 195 | 175 | 150 | 175 | 160 | 140 | |
| K | 1 | – | – | – | 325 | 295 | 260 | 275 | 250 | 220 | – | – | – | 505 | 460 | 410 | 435 | 390 | 350 | 355 | 320 | 285 |
| 2 | – | – | – | 255 | 225 | 215 | 215 | 195 | 180 | – | – | – | 400 | 355 | 330 | 345 | 310 | 280 | 280 | 255 | 230 | |
| 3 | – | – | – | 215 | 190 | 170 | 180 | 160 | 145 | – | – | – | 335 | 300 | 275 | 290 | 255 | 240 | 235 | 210 | 195 | |
| N | 1–2 | 1460 | 1300 | 1195 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 3 | 1300 | 1195 | 1100 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| S | 1 | – | – | – | – | – | – | 50 | 45 | 35 | 45 | 35 | 30 | – | – | – | – | – | – | – | – | – |
| 2 | – | – | – | – | – | – | 50 | 45 | 35 | 45 | 35 | 30 | – | – | – | – | – | – | – | – | – | |
| 3 | – | – | – | – | – | – | 60 | 50 | 35 | 55 | 45 | 30 | – | – | – | – | – | – | – | – | – | |
| 4 | – | – | – | – | – | – | 85 | 60 | 45 | 75 | 55 | 35 | – | – | – | – | – | – | – | – | – | |
| H | 1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Material Group | KC410M | KC520M | KC522M | KC725M | KCK15 | KCPK30 | |||||||||||||
| P | 1 | – | – | – | – | – | – | 1300 | 1130 | 1060 | 1030 | 900 | 840 | – | – | – | 1780 | 1560 | 1450 |
| 2 | – | – | – | – | – | – | 1080 | 950 | 790 | 860 | 760 | 640 | – | – | – | 1100 | 1000 | 900 | |
| 3 | – | – | – | – | – | – | 1000 | 840 | 700 | 790 | 670 | 550 | – | – | – | 1000 | 900 | 820 | |
| 4 | – | – | – | – | – | – | 890 | 730 | 590 | 710 | 590 | 470 | – | – | – | 740 | 690 | 620 | |
| 5 | – | – | – | – | – | – | 730 | 660 | 590 | 590 | 530 | 470 | – | – | – | 1020 | 910 | 830 | |
| 6 | – | – | – | – | – | – | 650 | 490 | 400 | 520 | 400 | 310 | – | – | – | 620 | 540 | – | |
| M | 1 | – | – | – | – | – | – | 800 | 710 | 650 | 670 | 590 | 540 | – | – | – | 820 | 720 | 620 |
| 2 | – | – | – | – | – | – | 730 | 620 | 520 | 610 | 520 | 430 | – | – | – | 730 | 640 | 550 | |
| 3 | – | – | – | – | – | – | 550 | 480 | 370 | 460 | 400 | 310 | – | – | – | 570 | 520 | 460 | |
| K | 1 | – | – | – | 1060 | 960 | 850 | 900 | 820 | 720 | – | – | – | 1660 | 1510 | 1340 | 1160 | 1050 | 940 |
| 2 | – | – | – | 830 | 740 | 700 | 710 | 640 | 590 | – | – | – | 1310 | 1170 | 1090 | 920 | 830 | 760 | |
| 3 | – | – | – | 700 | 620 | 560 | 590 | 530 | 480 | – | – | – | 1100 | 980 | 900 | 770 | 690 | 640 | |
| N | 1–2 | 4790 | 4260 | 3920 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 3 | 4260 | 3920 | 3600 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| S | 1 | – | – | – | – | – | – | 160 | 140 | 110 | 140 | 120 | 100 | – | – | – | – | – | – |
| 2 | – | – | – | – | – | – | 160 | 140 | 110 | 140 | 120 | 100 | – | – | – | – | – | – | |
| 3 | – | – | – | – | – | – | 200 | 160 | 110 | 180 | 140 | 100 | – | – | – | – | – | – | |
| 4 | – | – | – | – | – | – | 280 | 200 | 140 | 240 | 180 | 120 | – | – | – | – | – | – | |
| H | 1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| D1 mm | D1 max mm | Ap max | ramping angle (°) | ramping length mm |
| 63 | 74,2 | 11,7 | 5,5 | 121,5 |
| 80 | 91,1 | 11,7 | 4,0 | 167,3 |
| 100 | 111,0 | 11,7 | 3,0 | 223,2 |
| 125 | 135,9 | 11,7 | 2,3 | 291,3 |
| 160 | 170,8 | 11,7 | 1,7 | 394,2 |
| max DOC Ap | mm | chipload (fz) |
| Ap1 max | 5,0 | 1 x fz |
| Ap2 max | 11,7 | 0,6 x fz |
| max plunging depth | mm |
| Ap1 max | 4,2 |
| D1 mm | D1 max mm | hole diameter | Ap/rev mm | |
| min mm | max mm | |||
| 63 | 74,2 | 122,7 | 145,0 | 6,3 |
| 80 | 91,1 | 156,6 | 178,0 | 6,3 |
| 100 | 111,0 | 196,5 | 218,7 | 6,3 |
| 125 | 135,9 | 246,4 | 268,7 | 6,3 |
| 160 | 170,8 | 316,3 | 338,6 | 6,3 |
| D1 inch | D1 max inch | Ap max inch | ramping angle (°) | ramping length inch |
| 2.50 | 2.94 | .46 | 5.5 | 4.78 |
| 3.00 | 3.44 | .46 | 4.2 | 6.27 |
| 4.00 | 4.43 | .46 | 2.9 | 9.09 |
| 5.00 | 5.43 | .46 | 2.2 | 11.99 |
| 6.00 | 6.43 | .46 | 1.8 | 14.65 |
| max DOC Ap | inch | chipload (fz) |
| Ap1 max | .20 | 1 x fz |
| Ap2 max | .46 | 0,6 x fz |
| max plunging depth | inch |
| Ap1 max | .17 |
| hole diameter | ||||
| D1 inch | D1 max inch | min inch | max inch | Ap/Rev inch |
| 2.50 | 2.94 | 4.872 | 5.748 | .248 |
| 3.00 | 3.44 | 5.868 | 6.744 | .248 |
| 4.00 | 4.43 | 7.863 | 8.739 | .248 |
| 5.00 | 5.43 | 9.859 | 10.736 | .248 |
| 6.00 | 6.43 | 11.857 | 12.733 | .248 |
ISO Catalog Number
ANSI Catalog Number
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