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Kennametal Top Notch Portfolio Tooling. Three tools on a table.

Turning Shallow Depths Towards Precision

Top Notch is the reliable solution that guarantees consistent tool performance, precise indexing and exceptional clamping across various turning applications. The tooling systems deliver outstanding surface finishes and extend tool life.  Built to endure the harshest environments, our graded inserts ensure stability, which leads to longer, more predictable tool life and resilience. Top Notch tool holders will help reduce your costs and inventory by accommodating both threading and grooving inserts. The same seat size offers different groove widths and styles. Additionally, Top Notch can create several custom profiles to meet specific needs.

Features and Benefits

Top Notch Grades

Top Notch™ Grooving

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    Key Filters
    Workpiece Material
    Workpiece Material
    • P Steel (1256)
      • P0
        Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(1256)
      • P1
        Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(1256)
      • P2
        Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(1256)
      • P3
        Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(1256)
      • P4
        Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(1256)
      • P5
        Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(1256)
      • P6
        High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(1256)
    • M Stainless Steel (1340)
      • M1
        Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(1340)
      • M2
        High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(1340)
      • M3
        Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(1340)
    • K Cast Iron (832)
      • K1
        Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(832)
      • K2
        Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(832)
      • K3
        High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(832)
    • N Non-Ferrous Materials (1021)
      • N1
        Wrought Aluminum (1013)
      • N2
        Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%(858)
      • N3
        High-Silicon Aluminum Alloys Si >12.2%(86)
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    • S High-Temp Alloys (1405)
      • S1
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      • S2
        Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(1405)
      • S3
        Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(1405)
      • S4
        Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(1405)
    • H Hardened Materials (403)
      • H1
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      • H2
        Hardened Materials 48-55 HRC(140)
      • H3
        Hardened Materials 56-60 HRC(127)
      • H4
        Hardened Materials >60 HRC(127)
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