Kennametal Top Notch Grooving Inserts

Top Notch™ Grooving Tools and Beyond™ Inserts for Your Shallow Groove and Turn Operations

Primary Application

Top Notch Grooving is the proven solution for high productivity. The Top Notch system provides consistent tool performance, accurate indexing, and superior clamping to provide excellent surface finishing and superior tool life.

Features and Benefits

The Beyond PVD coated grades are designed to cut a variety of workpiece materials.
Rigid clamping securely locks insert in place through the toughest cuts.

Versatile design enables one system to handle O.D. and I.D. grooving, face grooving, back turning, undercutting, and even threading operations.
Chip control inserts provide excellent chip evacuation in grooving, and offer better chip control in multidirectional turning.

Click through to the products to see videos of them in action, and also find their related matching tools.

NGP-L

General-purpose grooving. O-ring grooving. Circlip grooving. 5°/Positive rake angle.

Product Code	Seat	W	RR	T
NGP4250L KCU10 »	4	6.35	0.57	6.35
NGP4250L KC5010 »	4	6.35	0.57	6.35
NGP4189L KCU10 »	4	4.80	0.57	6.35
NGP4189L KC5010 »	4	4.80	0.57	6.35
NGP3189L KC5010 »	3	4.80	0.57	3.81
NGP3156L KC5010 »	3	3.96	0.19	3.81
NGP3125L KD1425 »	3	3.18	0.19	3.81
NGP3125L KC5410 »	3	3.18	0.19	3.81
NGP3125L KC5010 »	3	3.18	0.19	3.81
NGP3088L KD1425 »	3	2.24	0.19	2.39
NGP3088L KC5010 »	3	2.24	0.19	2.39
NGP2M200L K313 »	2	2.00	0.19	2.79
NGP2M150L K313 »	2	1.50	0.19	2.79
NGP2125L KCU10 »	2	3.18	0.19	2.79
NGP2125L KC5410 »	2	3.18	0.19	2.79
NGP2125L KC5010 »	2	3.18	0.19	2.79
NGP2062L KC5410 »	2	1.58	0.19	2.79
NGP2062L KC5010 »	2	1.58	0.19	2.79
NGP2031L KCU10 »	2	0.79	0.09	1.27
NGP2031L KC5410 »	2	0.79	0.09	1.27
NGP2031L KC5010 »	2	0.79	0.09	1.27

NOTE Right hand inserts shown, left hand is mirror image.

NGD-LK

Chip control geometry. Deep grooving. Light turning. 10°/Positive rake angle.

Product Code	Seat	W	RR	T
NGD4M550LK KC5025 »	4	5.50	0.57	12.70
NGD4M550LK KC5010 »	4	5.50	0.57	12.70
NGD4M500LK KC5025 »	4	5.00	0.57	12.70
NGD4M500LK KC5010 »	4	5.00	0.57	12.70
NGD4M450LK KC5025 »	4	4.50	0.57	12.70
NGD4M450LK KC5010 »	4	4.50	0.57	12.70
NGD4M400LK KC5025 »	4	4.00	0.57	9.53
NGD4M400LK KC5010 »	4	4.00	0.57	9.53
NGD4250LK KCU25 »	4	6.35	0.57	12.70
NGD4250LK KCU10 »	4	6.35	0.57	12.70
NGD4250LK KC5025 »	4	6.35	0.57	12.70
NGD4189LK KCU25 »	4	4.80	0.57	9.53
NGD4189LK KCU10 »	4	4.80	0.57	9.53
NGD4189LK KC5025 »	4	4.80	0.57	9.53
NGD4189LK KC5010 »	4	4.80	0.57	9.53
NGD4125LK KCU25 »	4	3.18	0.19	6.35
NGD4125LK KCU10 »	4	3.18	0.19	6.35
NGD4125LK KC5025 »	4	3.18	0.19	6.35
NGD4125LK KC5010 »	4	3.18	0.19	6.35
NGD3M400LK KC5025 »	3	4.00	0.32	6.35
NGD3M400LK KC5010 »	3	4.00	0.32	6.35
NGD3M350LK KC5025 »	3	3.50	0.32	6.35
NGD3M350LK KC5010 »	3	3.50	0.32	6.35
NGD3M300LK KC5025 »	3	3.00	0.19	6.35
NGD3M300LK KC5010 »	3	3.00	0.19	6.35
NGD3M250LK KC5025 »	3	2.50	0.19	6.35
NGD3M250LK KC5010 »	3	2.50	0.19	6.35
NGD3M200LK KC5025 »	3	2.00	0.19	4.06
NGD3M200LK KC5010 »	3	2.00	0.19	4.06
NGD3189LK KCU25 »	3	4.80	0.57	6.35
NGD3189LK KC5025 »	3	4.80	0.57	6.35
NGD3189LK KC5010 »	3	4.80	0.57	6.35
NGD3125LK KCU25 »	3	3.18	0.19	6.35
NGD3125LK KCU10 »	3	3.18	0.19	6.35
NGD3125LK KC5025 »	3	3.18	0.19	6.35
NGD3125LK KC5010 »	3	3.18	0.19	6.35
NGD3125LK K313 »	3	3.18	0.19	6.35
NGD3094LK KCU25 »	3	2.39	0.19	6.35
NGD3094LK KCU10 »	3	2.39	0.19	6.35
NGD3094LK KC5025 »	3	2.39	0.19	6.35
NGD3094LK KC5010 »	3	2.39	0.19	6.35
NGD3094LK K313 »	3	2.39	0.19	6.35
NGD3062LK KCU25 »	3	1.58	0.19	3.18
NGD3062LK KCU10 »	3	1.58	0.19	3.18
NGD3062LK KC5025 »	3	1.58	0.19	3.18
NGD3062LK KC5010 »	3	1.58	0.19	3.18
NGD2M250LK KC5025 »	2	2.50	0.19	5.08
NGD2M250LK KC5010 »	2	2.50	0.19	5.08
NGD2M200LK KC5025 »	2	2.00	0.19	5.08
NGD2M200LK KC5010 »	2	2.00	0.19	5.08
NGD2M150LK KC5025 »	2	1.50	0.19	4.06
NGD2M150LK KC5010 »	2	1.50	0.19	4.06

NOTE Right hand inserts shown, left hand is mirror image.

NGD-L

Deep grooving. Neutral rake angle.

Product Code	Seat	W	RR	T
NGD4250L KCU10 »	4	6.35	0.57	12.70
NGD4250L KC5010 »	4	6.35	0.57	12.70
NGD4250L K313 »	4	6.35	0.57	12.70
NGD3189L KC5010 »	3	4.80	0.57	6.35
NGD3189L K313 »	3	4.80	0.57	6.35

NOTE Right hand inserts shown, left hand is mirror image.

NG-L

General-purpose grooving. O-ring grooving. Circlip grooving. Neutral rake angle.

Product Code	Seat	W	RR	T
NG6375L KC5025 »	6	9.53	0.83	6.35
NG5312L KC5025 »	5	7.93	0.83	9.52
NG4250L KCU25 »	4	6.35	0.57	6.35
NG4250L KCU10 »	4	6.35	0.57	6.35
NG4250L KC5025 »	4	6.35	0.57	6.35
NG4250L KC5010 »	4	6.35	0.57	6.35
NG4250L K313 »	4	6.35	0.57	6.35
NG4189LEST KB1630 »	4	4.80	0.57	6.35
NG4189L KCU25 »	4	4.80	0.57	6.35
NG4189L KCU10 »	4	4.80	0.57	6.35
NG4189L KC5010 »	4	4.80	0.57	6.35
NG4189L K313 »	4	4.80	0.57	6.35
NG4125L KCU25 »	4	3.18	0.19	3.81
NG4125L KC5010 »	4	3.18	0.19	3.81
NG4125L K313 »	4	3.18	0.19	3.81
NG3189LEST KD1425 »	3	4.80	0.57	3.81
NG3189L KCU25 »	3	4.80	0.57	3.81
NG3189L KCU10 »	3	4.80	0.57	3.81
NG3189L KC9110 »	3	4.80	0.57	3.81
NG3189L KC5025 »	3	4.80	0.57	3.81
NG3189L KC5010 »	3	4.80	0.57	3.81
NG3189L K313 »	3	4.80	0.57	3.81
NG3185L KC5025 »	3	4.70	0.57	3.81
NG3178L KCU25 »	3	4.52	0.19	3.81
NG3156L KCU25 »	3	3.96	0.19	3.81
NG3156L KC5025 »	3	3.96	0.19	3.81
NG3156L KC5010 »	3	3.96	0.19	3.81
NG3142L KCU25 »	3	3.61	0.32	3.81
NG3142L KCU10 »	3	3.61	0.32	3.81
NG3142L KC5010 »	3	3.61	0.32	3.81
NG3125LEST KD1425 »	3	3.18	0.19	3.81
NG3125LEST KB1630 »	3	3.18	0.19	3.81
NG3125L KCU25 »	3	3.18	0.19	3.81
NG3125L KCU10 »	3	3.18	0.19	3.81
NG3125L KC9110 »	3	3.18	0.19	3.81
NG3125L KC5025 »	3	3.18	0.19	3.81
NG3125L KC5010 »	3	3.18	0.19	3.81
NG3125L K313 »	3	3.18	0.19	3.81
NG3122L KCU25 »	3	3.10	0.19	3.81
NG3110L KCU25 »	3	2.79	0.32	3.81
NG3110L KC5025 »	3	2.79	0.32	3.81
NG3105L KCU25 »	3	2.67	0.19	3.81
NG3105L KCU10 »	3	2.67	0.19	3.81
NG3105L KC5010 »	3	2.67	0.19	3.81
NG3097L KCU25 »	3	2.46	0.32	3.81
NG3097L KCU10 »	3	2.46	0.32	3.81
NG3097L KC5010 »	3	2.46	0.32	3.81
NG3094LEST KD1425 »	3	2.39	0.19	3.81
NG3094LEST KB1630 »	3	2.39	0.19	3.81
NG3094L KCU25 »	3	2.39	0.19	3.81
NG3094L KCU10 »	3	2.39	0.19	3.81
NG3094L KC9110 »	3	2.39	0.19	3.81
NG3094L KC5025 »	3	2.39	0.19	3.81
NG3094L KC5010 »	3	2.39	0.19	3.81
NG3094L K313 »	3	2.39	0.19	3.81
NG3088L KCU25 »	3	2.24	0.19	2.39
NG3088L KCU10 »	3	2.24	0.19	2.39
NG3088L KC5010 »	3	2.24	0.19	2.39
NG3078L KCU10 »	3	1.98	0.19	2.39
NG3078L KC5010 »	3	1.98	0.19	2.39

NOTE Right hand inserts shown, left hand is mirror image.

NG-LK

Chip control geometry. General-purpose grooving. O-ring grooving. Circlip grooving. Light turning. 10°/Positive rake angle.

Product Code	Seat	W	RR	T
NG4M600LK KCU25 »	4	6.00	0.57	6.35
NG4M600LK KC9320 »	4	6.00	0.57	6.35
NG4M600LK KC5025 »	4	6.00	0.57	6.35
NG4M550LK KCU25 »	4	5.50	0.57	6.35
NG4M550LK KC5025 »	4	5.50	0.57	6.35
NG4M500LK KCU25 »	4	5.00	0.32	6.35
NG4M500LK KCU10 »	4	5.00	0.32	6.35
NG4M500LK KC9320 »	4	5.00	0.32	6.35
NG4M500LK KC9110 »	4	5.00	0.32	6.35
NG4M500LK KC5010 »	4	5.00	0.32	6.35
NG4M450LK KC5025 »	4	4.50	0.57	6.35
NG4M400LK KCU25 »	4	4.00	0.57	6.35
NG4M400LK KCU10 »	4	4.00	0.57	6.35
NG4M400LK KC9320 »	4	4.00	0.57	6.35
NG4M400LK KC9110 »	4	4.00	0.57	6.35
NG4M400LK KC5010 »	4	4.00	0.57	6.35
NG4M350LK KCU25 »	4	3.50	0.57	6.35
NG4M350LK KC9320 »	4	3.50	0.57	6.35
NG4M350LK KC9110 »	4	3.50	0.57	6.35
NG4M300LK KCU25 »	4	3.00	0.19	3.81
NG4250LK KCU25 »	4	6.35	0.57	6.35
NG4250LK KCU10 »	4	6.35	0.57	6.35
NG4250LK KC5025 »	4	6.35	0.57	6.35
NG4250LK KC5010 »	4	6.35	0.57	6.35
NG4189LK KCU25 »	4	4.80	0.57	6.35
NG4189LK KCU10 »	4	4.80	0.57	6.35
NG4189LK KC9110 »	4	4.80	0.57	6.35
NG4189LK KC5025 »	4	4.80	0.57	6.35
NG4189LK KC5010 »	4	4.80	0.57	6.35
NG4125LK KCU25 »	4	3.18	0.19	3.81
NG4125LK KC5010 »	4	3.18	0.19	3.81
NG3M450LK KCU25 »	3	4.50	0.32	3.81
NG3M425LK KCU25 »	3	4.24	0.32	3.81
NG3M425LK KCU10 »	3	4.25	0.32	3.81
NG3M425LK KC5010 »	3	4.25	0.32	3.81
NG3M400LK KCU25 »	3	3.99	0.32	3.81
NG3M400LK KCU10 »	3	3.99	0.32	3.81
NG3M400LK KC9320 »	3	3.99	0.32	3.81
NG3M400LK KC9110 »	3	3.99	0.32	3.81
NG3M400LK KC5025 »	3	4.00	0.32	3.81
NG3M400LK KC5010 »	3	4.00	0.32	3.81
NG3M350LK KCU25 »	3	3.50	0.32	3.81
NG3M350LK KC5025 »	3	3.50	0.32	3.81
NG3M325LK KCU25 »	3	3.25	0.19	3.81
NG3M325LK KC5025 »	3	3.25	0.19	3.81
NG3M320LK KCU25 »	3	3.20	0.19	3.81
NG3M320LK KC5025 »	3	3.20	0.19	3.81
NG3M300LK KCU25 »	3	3.00	0.19	3.81
NG3M300LK KCU10 »	3	3.00	0.19	3.81
NG3M300LK KC9320 »	3	3.00	0.19	3.81
NG3M300LK KC9110 »	3	3.00	0.19	3.81
NG3M300LK KC5025 »	3	3.00	0.19	3.81
NG3M300LK KC5010 »	3	3.00	0.19	3.81
NG3M275LK KCU25 »	3	2.75	0.19	3.81
NG3M275LK KCU10 »	3	2.75	0.19	3.81
NG3M275LK KC5025 »	3	2.75	0.19	3.81
NG3M275LK KC5010 »	3	2.75	0.19	3.81
NG3M250LK KCU25 »	3	2.50	0.19	3.81
NG3M250LK KC9320 »	3	2.50	0.19	3.81
NG3M250LK KC9110 »	3	2.50	0.19	3.81
NG3M250LK KC5025 »	3	2.50	0.19	3.81
NG3M225LK KCU25 »	3	2.24	0.19	2.39
NG3M225LK KCU10 »	3	2.24	0.19	2.39
NG3M225LK KC9320 »	3	2.24	0.19	2.39
NG3M225LK KC9110 »	3	2.24	0.19	2.39
NG3M225LK KC5010 »	3	2.24	0.19	2.39
NG3M220LK KCU25 »	3	2.20	0.19	2.39
NG3M220LK KC5025 »	3	2.20	0.19	2.39
NG3M200LK KCU25 »	3	2.00	0.19	2.39
NG3M200LK KC9320 »	3	2.00	0.19	2.39
NG3M200LK KC5025 »	3	2.00	0.19	2.39
NG3M175LK KCU25 »	3	1.75	0.19	2.39
NG3M175LK KC5025 »	3	1.75	0.19	2.39
NG3M150LK KCU25 »	3	1.50	0.19	2.39
NG3M150LK KC9320 »	3	1.50	0.19	2.39
NG3M150LK KC9110 »	3	1.50	0.19	2.39
NG3M150LK KC5025 »	3	1.50	0.19	2.39
NG3M120LK KCU25 »	3	1.20	0.19	1.91
NG3M120LK KCU10 »	3	1.20	0.19	1.91
NG3M120LK KC5025 »	3	1.20	0.19	1.91
NG3M120LK KC5010 »	3	1.20	0.19	1.91
NG3M100LK KCU25 »	3	1.00	0.19	1.91
NG3M100LK KC5025 »	3	1.00	0.19	1.91
NG3189LK KCU25 »	3	4.80	0.57	3.81
NG3189LK KCU10 »	3	4.80	0.57	3.81
NG3189LK KC9320 »	3	4.80	0.57	3.81
NG3189LK KC9110 »	3	4.80	0.57	3.81
NG3189LK KC5025 »	3	4.80	0.57	3.81
NG3189LK KC5010 »	3	4.80	0.57	3.81
NG3156LK KCU25 »	3	3.96	0.19	3.81
NG3156LK KCU10 »	3	3.96	0.19	3.81
NG3156LK KC5025 »	3	3.96	0.19	3.81
NG3156LK KC5010 »	3	3.96	0.19	3.81
NG3125LK KCU25 »	3	3.18	0.19	3.81
NG3125LK KCU10 »	3	3.18	0.19	3.81
NG3125LK KC9110 »	3	3.18	0.19	3.81
NG3125LK KC5025 »	3	3.18	0.19	3.81
NG3125LK KC5010 »	3	3.18	0.19	3.81
NG3094LK KT315 »	3	2.39	0.19	3.81
NG3094LK KCU25 »	3	2.39	0.19	3.81
NG3094LK KCU10 »	3	2.39	0.19	3.81
NG3094LK KC9110 »	3	2.39	0.19	3.81
NG3094LK KC5025 »	3	2.39	0.19	3.81
NG3094LK KC5010 »	3	2.39	0.19	3.81
NG3078LK KCU25 »	3	1.98	0.19	2.39
NG3078LK KCU10 »	3	1.98	0.19	2.39
NG3078LK KC5025 »	3	1.98	0.19	2.39
NG3078LK KC5010 »	3	1.98	0.19	2.39
NG3072LK KCU25 »	3	1.83	0.19	2.39
NG3072LK KCU10 »	3	1.83	0.19	2.39
NG3072LK KC5025 »	3	1.83	0.19	2.39
NG3072LK KC5010 »	3	1.83	0.19	2.39

NOTE Right hand inserts shown, left hand is mirror image.