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.

NR-RK

Chip control geometry. Full radius grooving turning profiling. 10°/Positive rake angle.

Product Code	Seat	W	RC	T
NR4125RK KCU25 »	4	6.35	3.18	6.35
NR4125RK KCU10 »	4	6.35	3.18	6.35
NR4125RK KC5025 »	4	6.35	3.18	6.35
NR4125RK KC5010 »	4	6.35	3.18	6.35
NR4094RK KCU25 »	4	4.78	2.39	6.35
NR4094RK KCU10 »	4	4.78	2.39	6.35
NR4094RK KC5010 »	4	4.78	2.39	6.35
NR4062RK KCU25 »	4	3.18	1.59	3.81
NR4062RK KCU10 »	4	3.18	1.59	3.81
NR4062RK KC5010 »	4	3.18	1.59	3.81
NR3078RK KCU25 »	3	3.96	1.98	3.81
NR3078RK KCU10 »	3	3.96	1.98	3.81
NR3078RK KC5010 »	3	3.96	1.98	3.81
NR3062RK KCU25 »	3	3.18	1.59	3.81
NR3062RK KCU10 »	3	3.18	1.59	3.81
NR3062RK KC5025 »	3	3.18	1.59	3.81
NR3062RK KC5010 »	3	3.18	1.59	3.81
NR3047RK KCU25 »	3	2.39	1.19	3.81
NR3047RK KCU10 »	3	2.39	1.19	3.81
NR3047RK KC5025 »	3	2.39	1.19	3.81
NR3047RK KC5010 »	3	2.39	1.19	3.81
NR3031RK KCU25 »	3	1.58	0.79	2.39
NR3031RK KCU10 »	3	1.58	0.79	2.39
NR3031RK KC5025 »	3	1.58	0.79	2.39
NR3031RK KC5010 »	3	1.58	0.79	2.39

NR-R

Full radius grooving. Turning profiling. Neutral rake angle.

Product Code	Seat	W	RC	T
NR4125R KCU25 »	4	6.35	3.18	6.35
NR4125R KCU10 »	4	6.35	3.18	6.35
NR4125R KC5010 »	4	6.35	3.18	6.35
NR4125R K313 »	4	6.35	3.18	6.35
NR4094R K313 »	4	4.78	2.39	6.35
NR3M225R KC5025 »	3	4.50	2.25	3.81
NR3M200R KC5025 »	3	4.00	2.00	3.81
NR3M150R KC5025 »	3	3.00	1.50	3.81
NR3M100R KC5025 »	3	2.00	1.00	2.39
NR3094R KCU25 »	3	4.78	2.39	3.81
NR3094R KCU10 »	3	4.78	2.39	3.81
NR3094R KC5025 »	3	4.78	2.39	3.81
NR3094R KC5010 »	3	4.78	2.39	3.81
NR3094R K313 »	3	4.78	2.39	3.81
NR3078R K313 »	3	3.96	1.98	3.81
NR3062R KCU25 »	3	3.18	1.59	3.81
NR3062R KCU10 »	3	3.18	1.59	3.81
NR3062R KC5025 »	3	3.18	1.59	3.81
NR3062R KC5010 »	3	3.18	1.59	3.81
NR3062R K313 »	3	3.18	1.59	3.81
NR3047R KCU25 »	3	2.39	1.19	3.81
NR3047R KCU10 »	3	2.39	1.19	3.81
NR3047R KC5010 »	3	2.39	1.19	3.81
NR3047R K313 »	3	2.39	1.19	3.81
NR3031R KCU25 »	3	1.58	0.79	2.39
NR3031R KCU10 »	3	1.58	0.79	2.39
NR3031R KC5025 »	3	1.58	0.79	2.39
NR3031R KC5010 »	3	1.58	0.79	2.39
NR3031R K313 »	3	1.58	0.79	2.39
NR2M175R KC5025 »	2	3.50	1.75	2.79
NR2M150R KC5025 »	2	3.00	1.50	2.79
NR2M125R KC5025 »	2	2.50	1.25	2.79
NR2M100R KCU10 »	2	2.00	1.00	2.79
NR2M100R KC5025 »	2	2.00	1.00	2.79
NR2M100R KC5010 »	2	2.00	1.00	2.79
NR2M075R KCU10 »	2	1.50	0.75	2.79
NR2M075R KC5010 »	2	1.50	0.75	2.79
NR2M050R KCU25 »	2	1.00	0.50	1.27
NR2M050R KCU10 »	2	1.00	0.50	1.27
NR2M050R KC5025 »	2	1.00	0.50	1.27
NR2M050R KC5010 »	2	1.00	0.50	1.27
NR2062R KCU25 »	2	3.18	1.59	2.79
NR2062R KCU10 »	2	3.18	1.59	2.79
NR2062R KC5010 »	2	3.18	1.59	2.79
NR2047R KCU25 »	2	2.39	1.19	2.79
NR2031R KCU25 »	2	1.58	0.79	2.79
NR2031R KCU10 »	2	1.58	0.79	2.79
NR2031R KC5025 »	2	1.58	0.79	2.79
NR2031R KC5010 »	2	1.58	0.79	2.79

NR-L

Full radius grooving. Turning profiling. Neutral rake angle.

Product Code	Seat	W	RC	T
NR4125L KCU25 »	4	6.35	3.18	6.35
NR4125L KCU10 »	4	6.35	3.18	6.35
NR4125L KC5010 »	4	6.35	3.18	6.35
NR3M225L KC5025 »	3	4.50	2.25	3.81
NR3M200L KC5025 »	3	4.00	2.00	3.81
NR3M150L KCU10 »	3	3.00	1.50	3.81
NR3M150L KC5025 »	3	3.00	1.50	3.81
NR3M150L KC5010 »	3	3.00	1.50	3.81
NR3M100L KC5025 »	3	2.00	1.00	2.39
NR3094L KCU25 »	3	4.78	2.39	3.81
NR3094L KCU10 »	3	4.78	2.39	3.81
NR3094L KC5025 »	3	4.78	2.39	3.81
NR3094L KC5010 »	3	4.78	2.39	3.81
NR3094L K313 »	3	4.78	2.39	3.81
NR3062L KCU25 »	3	3.18	1.59	3.81
NR3062L KCU10 »	3	3.18	1.59	3.81
NR3062L KC5025 »	3	3.18	1.59	3.81
NR3062L KC5010 »	3	3.18	1.59	3.81
NR3062L K313 »	3	3.18	1.59	3.81
NR3047L KCU25 »	3	2.39	1.19	3.81
NR3047L KCU10 »	3	2.39	1.19	3.81
NR3047L KC5010 »	3	2.39	1.19	3.81
NR3047L K313 »	3	2.39	1.19	3.81
NR3031L KCU25 »	3	1.58	0.79	2.39
NR3031L KCU10 »	3	1.58	0.79	2.39
NR3031L KC5025 »	3	1.58	0.79	2.39
NR3031L KC5010 »	3	1.58	0.79	2.39
NR3031L K313 »	3	1.58	0.79	2.39
NR2M175L KC5010 »	2	3.50	1.75	2.79
NR2M150L KC5025 »	2	3.00	1.50	2.79
NR2M125L KC5025 »	2	2.50	1.25	2.79
NR2M100L KC5025 »	2	2.00	1.00	2.79
NR2M050L KCU25 »	2	1.00	0.50	1.27
NR2M050L KCU10 »	2	1.00	0.50	1.27
NR2M050L KC5010 »	2	1.00	0.50	1.27
NR2062L KCU25 »	2	3.18	1.59	2.79
NR2062L KCU10 »	2	3.18	1.59	2.79
NR2062L KC5010 »	2	3.18	1.59	2.79
NR2047L KCU25 »	2	2.39	1.19	2.79
NR2031L KCU25 »	2	1.58	0.79	2.79
NR2031L KCU10 »	2	1.58	0.79	2.79
NR2031L KC5025 »	2	1.58	0.79	2.79
NR2031L KC5010 »	2	1.58	0.79	2.79

NR-LK

Chip control geometry. Full radius grooving turning profiling. 10°/Positive rake angle.

Product Code	Seat	W	RC	T
NR4062LK KC5010 »	4	3.18	1.59	3.81
NR3078LK KCU25 »	3	3.96	1.98	3.81
NR3078LK KCU10 »	3	3.96	1.98	3.81
NR3078LK KC5025 »	3	3.96	1.98	3.81
NR3078LK KC5010 »	3	3.96	1.98	3.81
NR3062LK KCU25 »	3	3.18	1.59	3.81
NR3062LK KCU10 »	3	3.18	1.59	3.81
NR3062LK KC5025 »	3	3.18	1.59	3.81
NR3062LK KC5010 »	3	3.18	1.59	3.81
NR3047LK KCU25 »	3	2.39	1.19	3.81
NR3047LK KCU10 »	3	2.39	1.19	3.81
NR3047LK KC5025 »	3	2.39	1.19	3.81
NR3047LK KC5010 »	3	2.39	1.19	3.81
NR3031LK KCU25 »	3	1.58	0.79	2.39
NR3031LK KCU10 »	3	1.58	0.79	2.39
NR3031LK KC5025 »	3	1.58	0.79	2.39
NR3031LK KC5010 »	3	1.58	0.79	2.39

NGP-R

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

Product Code	Seat	W	RR	T
NGP4250R KCU10 »	4	6.35	0.57	6.35
NGP4250R KC5010 »	4	6.35	0.57	6.35
NGP4189R KCU10 »	4	4.80	0.57	6.35
NGP4189R KC5010 »	4	4.80	0.57	6.35
NGP3189R KC5010 »	3	4.80	0.57	3.81
NGP3156R KC5010 »	3	3.96	0.19	3.81
NGP3125R KCU10 »	3	3.18	0.19	3.81
NGP3125R KC5010 »	3	3.18	0.19	3.81
NGP3088R KCU10 »	3	2.24	0.19	2.39
NGP3088R KC5010 »	3	2.24	0.19	2.39
NGP2M150R K313 »	2	1.50	0.19	2.79
NGP2125R KCU10 »	2	3.18	0.19	2.79
NGP2125R KC5010 »	2	3.18	0.19	2.79
NGP2062R KCU10 »	2	1.58	0.19	2.79
NGP2062R KC5010 »	2	1.58	0.19	2.79
NGP2031R KCU10 »	2	0.79	0.09	1.27
NGP2031R KC5010 »	2	0.79	0.09	1.27

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 KC5010 »	3	3.18	0.19	3.81
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 KC5010 »	2	3.18	0.19	2.79
NGP2062L KC5010 »	2	1.58	0.19	2.79
NGP2031L KCU10 »	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-RK

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

Product Code	Seat	W	RR	T
NGD4M550RK KC5025 »	4	5.50	0.57	12.70
NGD4M550RK KC5010 »	4	5.50	0.57	12.70
NGD4M500RK KC5025 »	4	5.00	0.57	12.70
NGD4M500RK KC5010 »	4	5.00	0.57	12.70
NGD4M450RK KC5025 »	4	4.50	0.57	12.70
NGD4M450RK KC5010 »	4	4.50	0.57	12.70
NGD4M400RK KC5025 »	4	4.00	0.57	9.53
NGD4M400RK KC5010 »	4	4.00	0.57	9.53
NGD4250RK KCU25 »	4	6.35	0.57	12.70
NGD4250RK KCU10 »	4	6.35	0.57	12.70
NGD4250RK KC5025 »	4	6.35	0.57	12.70
NGD4250RK KC5010 »	4	6.35	0.57	12.70
NGD4250RK K313 »	4	6.35	0.57	12.70
NGD4189RK KCU25 »	4	4.80	0.57	9.53
NGD4189RK KCU10 »	4	4.80	0.57	9.53
NGD4189RK KC5025 »	4	4.80	0.57	9.53
NGD4189RK KC5010 »	4	4.80	0.57	9.53
NGD4189RK K313 »	4	4.80	0.57	9.53
NGD4125RK KCU25 »	4	3.18	0.19	6.35
NGD4125RK KCU10 »	4	3.18	0.19	6.35
NGD4125RK KC5025 »	4	3.18	0.19	6.35
NGD4125RK KC5010 »	4	3.18	0.19	6.35
NGD3M400RK KC5025 »	3	4.00	0.32	6.35
NGD3M400RK KC5010 »	3	4.00	0.32	6.35
NGD3M350RK KC5025 »	3	3.50	0.32	6.35
NGD3M350RK KC5010 »	3	3.50	0.32	6.35
NGD3M300RK KC5025 »	3	3.00	0.19	6.35
NGD3M300RK KC5010 »	3	3.00	0.19	6.35
NGD3M250RK KC5025 »	3	2.50	0.19	6.35
NGD3M250RK KC5010 »	3	2.50	0.19	6.35
NGD3M200RK KC5025 »	3	2.00	0.19	4.06
NGD3M200RK KC5010 »	3	2.00	0.19	4.06
NGD3189RK KCU25 »	3	4.80	0.57	6.35
NGD3189RK KC5025 »	3	4.80	0.57	6.35
NGD3189RK KC5010 »	3	4.80	0.57	6.35
NGD3125RK KCU25 »	3	3.18	0.19	6.35
NGD3125RK KCU10 »	3	3.18	0.19	6.35
NGD3125RK KC5025 »	3	3.18	0.19	6.35
NGD3125RK KC5010 »	3	3.18	0.19	6.35
NGD3125RK K313 »	3	3.18	0.19	6.35

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

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

NGD-R

Deep grooving. Neutral rake angle.

Product Code	Seat	W	RR	T
NGD4250R KCU10 »	4	6.35	0.57	12.70
NGD4250R KC5010 »	4	6.35	0.57	12.70
NGD4250R K313 »	4	6.35	0.57	12.70
NGD3189R KC5010 »	3	4.80	0.57	6.35
NGD3189R K313 »	3	4.80	0.57	6.35

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.