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Shoulder milling insert with four cutting edges per insert, precision ground

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Mill 4™-12^KT • Carbide Insert • LNGQ12-KT4 • Left Handed Inserts for Made-To-Order Slotting Cutters

Name: Mill 4™-12 KT • Carbide Insert • LNGQ12-KT4 • Left Handed Inserts for Made-To-Order Slotting Cutters
SKU: 6818864

Shoulder milling insert with four cutting edges per insert, precision ground

Metric

Inch

SAP Material Number	6818864
ISO Catalog Number	LNGQ120604ELGEKT4_OBS
ANSI Catalog Number	LNGQ120604ELGEKT4_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	13.5040 mm
[W] Insert Width	.5316 in
[Rε] Corner Radius	0.3970 mm
[Rε] Corner Radius	.0156 in
Cutting Edges per Insert	4

See all Product Variants

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

Workpiece Side

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.

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.

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.

Spare Parts for Mill 4™-12^KT • Carbide Insert • LNGQ12-KT4 • Left Handed Inserts for Made-To-Order Slotting Cutters

INSERT SCR M4-0.7 x 11.5 IP15

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Mill 4™-12^KT • Carbide Insert • LNGQ12-KT4 • Left Handed Inserts for Made-To-Order Slotting Cutters