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.

NG-RK

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

Product Code	Seat	W	RR	T
NG3M320RK KCU25 »	3	3.20	0.19	3.81
NG3M325RK KC5025 »	3	3.25	0.19	3.81
NG3M325RK KCU25 »	3	3.25	0.19	3.81
NG3M350RK KC5025 »	3	3.50	0.32	3.81
NG3M350RK KCU25 »	3	3.50	0.32	3.81
NG3M350RK KT315 »	3	3.50	0.32	3.81
NG3M400RK KC5010 »	3	3.99	0.32	3.81
NG3M400RK KC5025 »	3	3.99	0.32	3.81
NG3M400RK KC9110 »	3	3.99	0.32	3.81
NG3M400RK KC9320 »	3	3.99	0.32	3.81
NG3M400RK KCU10 »	3	3.99	0.32	3.81
NG3M400RK KCU25 »	3	3.99	0.32	3.81
NG3M400RK KT315 »	3	3.99	0.32	3.81
NG3M425RK KC5010 »	3	4.24	0.32	3.81
NG3M425RK KC5025 »	3	4.24	0.32	3.81
NG3M425RK KCU10 »	3	4.24	0.32	3.81
NG3M425RK KCU25 »	3	4.24	0.32	3.81
NG3M450RK KCU25 »	3	4.50	0.32	3.81
NG4125RK KC5010 »	4	3.18	0.19	3.81
NG4125RK KCU25 »	4	3.18	0.19	3.81
NG4189RK KC5010 »	4	4.80	0.57	6.35
NG4189RK KC5025 »	4	4.80	0.57	6.35
NG4189RK KC9110 »	4	4.80	0.57	6.35
NG4189RK KCU10 »	4	4.80	0.57	6.35
NG4189RK KCU25 »	4	4.80	0.57	6.35
NG4250RK KC5010 »	4	6.35	0.57	6.35
NG4250RK KC5025 »	4	6.35	0.57	6.35
NG4250RK KCU10 »	4	6.35	0.57	6.35
NG4250RK KCU25 »	4	6.35	0.57	6.35
NG4M300RK KCU25 »	4	3.00	0.19	3.81
NG4M350RK KC9110 »	4	3.50	0.57	6.35
NG4M350RK KC9320 »	4	3.50	0.57	6.35
NG4M350RK KCU25 »	4	3.50	0.57	6.35
NG4M400RK KC5010 »	4	4.00	0.57	6.35
NG4M400RK KC5025 »	4	4.00	0.57	6.35
NG4M400RK KC9320 »	4	4.00	0.57	6.35
NG4M400RK KCU10 »	4	4.00	0.57	6.35
NG4M400RK KCU25 »	4	4.00	0.57	6.35
NG4M450RK KCU25 »	4	4.50	0.57	6.35
NG4M500RK KC5010 »	4	5.00	0.32	6.35
NG4M500RK KC9110 »	4	5.00	0.32	6.35
NG4M500RK KC9320 »	4	5.00	0.32	6.35
NG4M500RK KCU10 »	4	5.00	0.32	6.35
NG4M500RK KCU25 »	4	5.00	0.32	6.35
NG4M550RK KC5025 »	4	5.50	0.57	6.35
NG4M550RK KCU25 »	4	5.50	0.57	6.35
NG4M600RK KC9110 »	4	6.00	0.57	6.35
NG4M600RK KC9320 »	4	6.00	0.57	6.35
NG4M600RK KCU25 »	4	6.00	0.57	6.35

NG-R

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

Product Code	Seat	W	RR	T
NG4125R K313 »	4	3.18	0.19	3.81
NG4125R KC5010 »	4	3.18	0.19	3.81
NG4125R KCU25 »	4	3.18	0.19	3.81
NG4189R K313 »	4	4.80	0.57	6.35
NG4189R KC5010 »	4	4.80	0.57	6.35
NG4189R KC9110 »	4	4.80	0.57	6.35
NG4189R KCU10 »	4	4.80	0.57	6.35
NG4189R KCU25 »	4	4.80	0.57	6.35
NG4189REST KB1630 »	4	4.80	0.57	6.35
NG4213R KCU25 »	4	5.41	0.19	6.35
NG4219R KC5025 »	4	5.56	0.57	6.35
NG4250R K313 »	4	6.35	0.57	6.35
NG4250R KC5010 »	4	6.35	0.57	6.35
NG4250R KC5025 »	4	6.35	0.57	6.35
NG4250R KC9110 »	4	6.35	0.57	6.35
NG4250R KCU10 »	4	6.35	0.57	6.35
NG4250R KCU25 »	4	6.35	0.57	6.35
NG5250R KC5025 »	5	6.35	0.57	9.52
NG5312R KCU25 »	5	7.93	0.83	9.52
NG5375R KC5025 »	5	9.53	0.83	9.52
NG6281R KC5025 »	6	7.14	0.83	6.35
NG6281R KCU25 »	6	7.14	0.83	6.35
NG6375R KC5025 »	6	9.53	0.83	6.35
NG6375R KCU25 »	6	9.53	0.83	6.35

NGP-R

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

Product Code	Seat	W	RR	T
NGP2031R KC5010 »	2	0.79	0.09	1.27
NGP2031R KC5410 »	2	0.79	0.09	1.27
NGP2031R KCU10 »	2	0.79	0.09	1.27
NGP2062R KC5010 »	2	1.58	0.19	2.79
NGP2062R KC5410 »	2	1.58	0.19	2.79
NGP2062R KCU10 »	2	1.58	0.19	2.79
NGP2125R KC5010 »	2	3.18	0.19	2.79
NGP2125R KC5410 »	2	3.18	0.19	2.79
NGP2125R KCU10 »	2	3.18	0.19	2.79
NGP2M150R K313 »	2	1.50	0.19	2.79
NGP3088R KC5010 »	3	2.24	0.19	2.39
NGP3088R KC5410 »	3	2.24	0.19	2.39
NGP3088R KCU10 »	3	2.24	0.19	2.39
NGP3088R KD1425 »	3	2.24	0.19	2.39
NGP3125R KC5010 »	3	3.18	0.19	3.81
NGP3125R KC5410 »	3	3.18	0.19	3.81
NGP3125R KCU10 »	3	3.18	0.19	3.81
NGP3125R KD1425 »	3	3.18	0.19	3.81
NGP3156R KC5010 »	3	3.96	0.19	3.81
NGP3189R KC5010 »	3	4.80	0.57	3.81
NGP4189R KC5010 »	4	4.80	0.57	6.35
NGP4189R KC5410 »	4	4.80	0.57	6.35
NGP4189R KCU10 »	4	4.80	0.57	6.35
NGP4250R KC5010 »	4	6.35	0.57	6.35
NGP4250R KCU10 »	4	6.35	0.57	6.35