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Mill 4™-12KT • Carbide Insert • LNGQ12-GE • Medium Machining
Shoulder milling insert with four cutting edges per insert, precision ground
Metric
Inch
| SAP Material Number | 6820754 |
| ISO Catalog Number | LNGQ120608ERGEKT4_OBS |
| ANSI Catalog Number | LNGQ120608ERGEKT4_OBS |
| Grade | KCK20B |
| [LI] Insert Length | 13.0000 mm |
| [LI] Insert Length | .5118 in |
| [S] Insert Thickness | 6.3500 mm |
| [S] Insert Thickness | .2500 in |
| [W] Insert Width | 13.3850 mm |
| [W] Insert Width | .5270 in |
| [Rε] Corner Radius | 0.7940 mm |
| [Rε] Corner Radius | .0312 in |
| Cutting Edges per Insert | 4 |
Workpiece Materials
K
Cast Iron
Features and benefits
- Precision ground insert for best surface finish.
- Advanced insert/pocket interface ensures stability and consistent performance in difficult applications.
- Up to 15% lower power consumption.
- Easy insert indexing through screw clamping.
Machine Side
loading...
Workpiece Side
loading...
Grades
-
KCK20B
Composition: A multilayered coating with thick MTCVD TiCN-Al2O3-TiOCN layers applied over a carbide substrate specifically engineered for cast irons.
Application: Delivers consistent performance in high-speed machining of grey and ductile irons. The substrate design permits the insert to stay in the cut for a long time at high speeds with minimum deformation. The thick CVD coating and post-coat treatment provide superior wear resistance ensuring long and consistent tool life. Can be applied both in straight and lightly interrupted cuts.K Cast Iron
Insert Selection Guide
| 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..GE | KC522M | .E..GE | KCPM40 | .E..HD | KCPM40 |
| P3–P4 | .E..GE | KC522M | .E..GE | KCPM40 | .E..HD | KCPM40 |
| P5–P6 | .E..GE | KC522M | .E..GE | KCPK30 | .E..HD | KCPK30 |
| M1–M2 | .E..GE | KC522M | .E..GE | KCSM40 | .E..HD | KCPM40 |
| M3 | .E..GE | KC522M | .E..GE | KCSM40 | .E..HD | KCPM40 |
| K1–K2 | .E..GE | KCK15 | .E..GE | KCK15 | .E..HD | KCK15 |
| K3 | .E..GE | KCK20 | .E..GE | KCK20B | .E..HD | KCK20B |
| N1–N2 | – | – | – | – | – | – |
| N3 | – | – | – | – | – | – |
| S1–S2 | .E..GE | KC522M | .E..GE | KCSM40 | – | – |
| S3 | .E..GE | KC522M | .E..GE | KCSM40 | – | – |
| S4 | .E..GE | KC522M | .E..GE | KCSM40 | – | – |
| H1 | – | – | – | – | – | – |
Recommended Starting Feeds [mm]
| Insert Geometry | Recommended Starting Feed per Tooth (Fz) in Relation to % of Radial Engagement (ae) | ||||||||||||||
| 10% | 20% | 30% | 40% | 50–100% | |||||||||||
| L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | |
| .E..GE | 0,12 | 0,33 | 0,09 | 0,25 | 0,08 | 0,22 | 0,07 | 0,20 | 0,07 | 0,20 | |||||
| .E..HD | 0,12 | 0,33 | 0,55 | 0,09 | 0,25 | 0,44 | 0,08 | 0,22 | 0,38 | 0,07 | 0,20 | 0,36 | 0,07 | 0,20 | 0,35 |
| L = Light Machining; M = Medium Machining; H = Heavy Machining NOTE: Use "Light Machining" values as starting feed rate. | |||||||||||||||
| Leichte Bearbeitung | Allgemeine Anwendung | Schruppbearbeitung |
Recommended Starting Feeds [IPT]
| Insert Geometry | Recommended Starting Feed per Tooth (Fz) in Relation to % of Radial Engagement (ae) | ||||||||||||||
| 10% | 20% | 30% | 40% | 50–100% | |||||||||||
| L | M | H | L | M | H | L | M | H | L | M | H | L | M | H | |
| .E..GE | .005 | .014 | .004 | .010 | .003 | .009 | .003 | .008 | .003 | .008 | |||||
| .E..HD | .005 | .014 | .024 | .004 | .010 | .018 | .003 | .009 | .015 | .003 | .008 | .014 | .003 | .008 | .014 |
| L = Light Machining; M = Medium Machining; H = Heavy Machining NOTE: Use "Light Machining" values as starting feed rate. | |||||||||||||||
| Leichte Bearbeitung | Allgemeine Anwendung | Schruppbearbeitung |
Recommended Starting Speeds [m/min]
| Grade | KC522M | KCK15 | KCK20B | KCPK30 | KCPM40 | KCSM40 | KC725M | |||||||||||||||
| Chip Thickness hex mm | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | ||||||||
| Material Group | Max | Start | Min | Max | Start | Min | Max | Start | Min | Max | Start | Min | Start | Start | Min | KCSM40 | Start | Min | KCSM40 | Start | Min | |
| P | 1 | 330 | 285 | 270 | – | – | – | – | – | – | 455 | 395 | 370 | 295 | 260 | 245 | 370 | 320 | 300 | 260 | 230 | 215 |
| 2 | 275 | 240 | 200 | – | – | – | – | – | – | 280 | 255 | 230 | 250 | 215 | 180 | 305 | 270 | 220 | 220 | 190 | 160 | |
| 3 | 255 | 215 | 175 | – | – | – | – | – | – | 255 | 230 | 205 | 230 | 195 | 160 | 285 | 240 | 195 | 200 | 170 | 140 | |
| 4 | 225 | 185 | 150 | – | – | – | – | – | – | 190 | 175 | 160 | 205 | 170 | 135 | 250 | 205 | 165 | 180 | 150 | 120 | |
| 5 | 185 | 170 | 150 | – | – | – | – | – | – | 260 | 230 | 210 | 170 | 155 | 135 | 205 | 190 | 165 | 150 | 135 | 120 | |
| 6 | 165 | 125 | 100 | – | – | – | – | – | – | 160 | 135 | 110 | 150 | 115 | 90 | 185 | 140 | 110 | 130 | 100 | 80 | |
| M | 1 | 205 | 180 | 165 | – | – | – | – | – | – | 205 | 185 | 155 | 195 | 170 | 155 | 225 | 200 | 185 | 170 | 150 | 135 |
| 2 | 185 | 160 | 130 | – | – | – | – | – | – | 185 | 160 | 140 | 175 | 150 | 125 | 205 | 180 | 145 | 155 | 130 | 110 | |
| 3 | 140 | 120 | 95 | – | – | – | – | – | – | 145 | 130 | 115 | 130 | 115 | 90 | 155 | 135 | 105 | 115 | 100 | 80 | |
| K | 1 | 230 | 205 | 185 | 420 | 385 | 340 | 360 | 290 | 245 | 295 | 265 | 240 | – | – | – | – | – | – | – | – | – |
| 2 | 180 | 160 | 150 | 335 | 295 | 275 | 280 | 230 | 195 | 235 | 210 | 190 | – | – | – | – | – | – | – | – | – | |
| 3 | 150 | 135 | 120 | 280 | 250 | 230 | 210 | 175 | 140 | 195 | 175 | 160 | – | – | – | – | – | – | – | – | – | |
| N | 1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| 3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| S | 1 | 40 | 35 | 25 | – | – | – | – | – | – | – | – | – | 40 | 35 | 30 | 45 | 40 | 30 | 35 | 30 | 25 |
| 2 | 40 | 35 | 25 | – | – | – | – | – | – | – | – | – | 40 | 35 | 30 | 45 | 40 | 30 | 35 | 30 | 25 | |
| 3 | 50 | 40 | 25 | – | – | – | – | – | – | – | – | – | 50 | 40 | 30 | 55 | 45 | 30 | 45 | 35 | 25 | |
| 4 | 50 | 45 | 35 | – | – | – | – | – | – | 50 | 45 | 35 | 55 | 50 | 35 | 60 | 55 | 40 | 50 | 45 | 30 | |
| H | 1 | 120 | 90 | 70 | – | – | – | – | – | – | – | – | – | – | – | – | 135 | 100 | 75 | – | – | – |
| 2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| 3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| Recommended starting speeds are in bold type. As the average chip thickness increases, speed should be decreased. Material groups P, M, K, and H show recommended starting speeds for dry machining. For wet machining, reduce speed by 20%. Material groups N and S show recommended starting speeds for wet machining. Not recommended for dry machining. | ||||||||||||||||||||||
Recommended Starting Speeds [SFM]
| Grade | KC522M | KCK15 | KCK20B | KCPK30 | KCPM40 | KCSM40 | KC725M | |||||||||||||||
| Chip Thickness hex Inch | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | Min | Max | ||||||||
| Material Group | Max | Start | Min | Max | Start | Min | Max | Start | Min | Max | Start | Min | Max | Start | Min | Max | Start | Min | Max | Start | Min | |
| P | 1 | 1085 | 935 | 885 | – | – | – | – | – | – | 1495 | 1295 | 1215 | 970 | 855 | 805 | 1150 | 1050 | 985 | 855 | 755 | 705 |
| 2 | 900 | 785 | 655 | – | – | – | – | – | – | 920 | 835 | 755 | 820 | 705 | 590 | 985 | 885 | 720 | 720 | 625 | 525 | |
| 3 | 835 | 705 | 575 | – | – | – | – | – | – | 835 | 755 | 675 | 755 | 640 | 525 | 920 | 785 | 640 | 655 | 560 | 460 | |
| 4 | 740 | 605 | 490 | – | – | – | – | – | – | 625 | 575 | 525 | 675 | 560 | 445 | 785 | 675 | 540 | 590 | 490 | 395 | |
| 5 | 605 | 560 | 490 | – | – | – | – | – | – | 855 | 755 | 690 | 560 | 510 | 445 | 655 | 590 | 525 | 490 | 445 | 395 | |
| 6 | 540 | 410 | 330 | – | – | – | – | – | – | 525 | 445 | 360 | 490 | 375 | 295 | 590 | 460 | 330 | 425 | 330 | 260 | |
| M | 1 | 675 | 590 | 540 | – | – | – | – | – | – | 675 | 605 | 510 | 640 | 560 | 510 | 855 | 625 | 375 | 560 | 490 | 445 |
| 2 | 605 | 525 | 425 | – | – | – | – | – | – | 605 | 525 | 460 | 575 | 490 | 410 | 755 | 560 | 345 | 510 | 425 | 360 | |
| 3 | 460 | 395 | 310 | – | – | – | – | – | – | 475 | 425 | 375 | 425 | 375 | 295 | 625 | 460 | 280 | 375 | 330 | 260 | |
| K | 1 | 755 | 675 | 605 | 1380 | 1265 | 1115 | 1180 | 950 | 805 | 970 | 870 | 785 | – | – | – | – | – | – | – | – | – |
| 2 | 590 | 525 | 490 | 1100 | 970 | 900 | 920 | 755 | 640 | 770 | 690 | 625 | – | – | – | – | – | – | – | – | – | |
| 3 | 490 | 445 | 395 | 920 | 820 | 755 | 690 | 575 | 460 | 640 | 575 | 525 | – | – | – | – | – | – | – | – | – | |
| N | 1 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| 2 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| 3 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |
| S | 1 | 130 | 115 | 80 | – | – | – | – | – | – | – | – | – | 130 | 115 | 100 | 195 | 150 | 80 | 115 | 100 | 80 |
| 2 | 130 | 115 | 80 | – | – | – | – | – | – | – | – | – | 130 | 115 | 100 | 180 | 130 | 80 | 115 | 100 | 80 | |
| 3 | 165 | 130 | 80 | – | – | – | – | – | – | – | – | – | 165 | 130 | 100 | 215 | 150 | 100 | 150 | 115 | 80 | |
| 4 | 165 | 150 | 115 | – | – | – | – | – | – | 165 | 150 | 115 | 180 | 165 | 115 | 245 | 195 | 130 | 165 | 150 | 100 | |
| H | 1 | 395 | 295 | 230 | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – |
| Recommended starting speeds are in bold type. As the average chip thickness increases, speed should be decreased. Material groups P, M, K, and H show recommended starting speeds for dry machining. For wet machining, reduce speed by 20%. Material groups N and S show recommended starting speeds for wet machining. Not recommended for dry machining. | ||||||||||||||||||||||