Boring Heads

Top Notch™ threading boring heads are specifically designed to excel in creating larger holes that already exist. They are available in several diameters, providing a range of threading options. These boring heads are designed to deliver outstanding performance.

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    Key Filters
    Workpiece Material
    Workpiece Material
    • P Steel (6)
      • P0
        Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(6)
      • P1
        Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(6)
      • P2
        Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(6)
      • P3
        Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(6)
      • P4
        Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(6)
      • P5
        Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(6)
      • P6
        High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(6)
    • M Stainless Steel (6)
      • M1
        Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(6)
      • M2
        High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(6)
      • M3
        Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(6)
    • K Cast Iron (6)
      • K1
        Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(6)
      • K2
        Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(6)
      • K3
        High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(6)
    • N Non-Ferrous Materials (6)
      • N1
        Wrought Aluminum (6)
      • N2
        Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%(5)
      • N3
        High-Silicon Aluminum Alloys Si >12.2%(2)
      • N4
        Copper, Brass, Zinc-based on machinability index range of 70-100 (6)
      • N5
        Nylon, Plastics, Rubbers, Phenolics, Resins, Fiberglass (5)
      • N6
        Carbon, Graphite Composites, CFRP (5)
    • S High-Temp Alloys (6)
      • S1
        Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS(6)
      • S2
        Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(6)
      • S3
        Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(6)
      • S4
        Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(6)
    • H Hardened Materials (5)
      • H1
        Hardened Materials 44-48 HRC(5)
      • H2
        Hardened Materials 48-55 HRC(5)
      • H3
        Hardened Materials 56-60 HRC(5)
      • H4
        Hardened Materials >60 HRC(5)
    Applications
    Applications
    • Face GroovingFace Grooving (6)
    • ID GroovingID Grooving (6)
    • ID Thread TurningID Thread Turning (6)
    Type of Thread
    Type of Thread
    • 60 (5)
    • ACME (6)
    • API (5)
    • API RD (3)
    • BSW (2)
    • BUTTRESS (5)
    • M (2)
    • NPT (2)
    • STUB ACME (2)
    • UN (5)
    • UNJ (2)
    Cutting Condition
    Cutting Condition
    • Heavily Interrupted Cut (5)
    • Lightly Interrupted Cut (5)
    • Smooth Cut (5)
    • Varying Depth of Cut (5)
    Cutting Edges Per Insert
    Cutting Edges Per Insert
    • 1.0 (5)
    • 2.0 (6)
    Cutting Edges Per Insert MintoCutting Edges Per Insert Max
    Corner configuration
    Corner Radius
    Corner Radius
    • 0.002 in(2)
    • 0.003 in(5)
    • 0.004 in(2)
    • 0.005 in(2)
    • 0.006 in(5)
    • 0.007 in(5)
    • 0.008 in(5)
    • 0.01 in(5)
    • 0.011 in(2)
    • 0.012 in(2)
    • 0.014 in(5)
    • 0.016 in(3)
    • 0.019 in(5)
    • 0.02 in(2)
    • 0.023 in(5)
    • 0.031 in(2)
    • 0.033 in(1)
    • 0.035 in(5)
    • 0.039 in(2)
    • 0.047 in(2)
    • 0.049 in(2)
    • 0.06 in(2)
    • 0.062 in(2)
    • 0.063 in(5)
    • 0.069 in(2)
    • 0.078 in(2)
    • 0.079 in(5)
    • 0.089 in(5)
    • 0.095 in(5)
    • 0.098 in(3)
    • 0.125 in(3)
    Corner Radius MintoCorner Radius Max
    Corner Radius
    Corner Radius
    • 0.05 mm(2)
    • 0.076 mm(5)
    • 0.1 mm(2)
    • 0.125 mm(2)
    • 0.151 mm(5)
    • 0.176 mm(5)
    • 0.2 mm(5)
    • 0.225 mm(2)
    • 0.25 mm(5)
    • 0.275 mm(2)
    • 0.301 mm(2)
    • 0.325 mm(5)
    • 0.351 mm(5)
    • 0.4 mm(3)
    • 0.45 mm(5)
    • 0.476 mm(1)
    • 0.5 mm(2)
    • 0.576 mm(5)
    • 0.775 mm(2)
    • 0.826 mm(1)
    • 0.9 mm(5)
    • 1.0 mm(2)
    • 1.201 mm(2)
    • 1.25 mm(2)
    • 1.5 mm(2)
    • 1.576 mm(2)
    • 1.6 mm(5)
    • 1.75 mm(2)
    • 1.975 mm(2)
    • 2.0 mm(5)
    • 2.25 mm(5)
    • 2.401 mm(5)
    • 2.5 mm(3)
    • 3.176 mm(3)
    Corner Radius MintoCorner Radius Max
    Application
    Minimum Depth of Cut
    Minimum Depth of Cut
    Minimum Feed
    Minimum Feed
    Grade Of Cutting Tool
    Grade Of Cutting Tool
    • K2885 (2)
    • K313 (5)
    • K420 (6)
    • K4H (2)
    • K68 (6)
    • KB1345 (5)
    • KB1630 (5)
    • KB5625 (2)
    • KBH20 (1)
    • KC250 (2)
    • KC5010 (6)
    • KC5025 (6)
    • KC5410 (5)
    • KC710 (5)
    • KC720 (5)
    • KC722 (5)
    • KC730 (6)
    • KC732 (2)
    • KC810 (6)
    • KC850 (6)
    • KC910 (2)
    • KC9110 (5)
    • KC9120 (2)
    • KC9320 (5)
    • KC935 (5)
    • KC950 (5)
    • KCK20 (5)
    • KCK20B (5)
    • KCP10B (5)
    • KCP25B (5)
    • KCU10 (6)
    • KCU10B (6)
    • KCU25 (6)
    • KCU25B (5)
    • KD050 (1)
    • KD081 (2)
    • KD100 (4)
    • KD120 (5)
    • KD1425 (2)
    • KT175 (2)
    • KT315 (5)
    • KU10T (5)
    • KU25T (5)
    • KU30T (5)
    • KY3000 (5)
    Hand Of Tool
    Hand Of Tool
    • L (2)
    • R (4)
    F Dimension
    F Dimension
    • 38.1 mm(3)
    • 41.276 mm(3)
    F Dimension MintoF Dimension Max
    F Dimension
    F Dimension
    • 1.5 in(3)
    • 1.625 in(3)
    F Dimension MintoF Dimension Max
    Minimum Axial Groove Diameter
    Minimum Axial Groove Diameter
    • 76.2 mm(3)
    • 82.551 mm(3)
    Minimum Axial Groove Diameter MintoMinimum Axial Groove Diameter Max
    Minimum Axial Groove Diameter
    Minimum Axial Groove Diameter
    • 3.0 in(3)
    • 3.25 in(3)
    Minimum Axial Groove Diameter MintoMinimum Axial Groove Diameter Max
    Maximum Axial Groove Diameter
    Maximum Axial Groove Diameter
    • 393.661 in(5)
    Maximum Axial Groove Diameter MintoMaximum Axial Groove Diameter Max
    Maximum Axial Groove Diameter
    Maximum Axial Groove Diameter
    • 9999.0 mm(5)
    Maximum Axial Groove Diameter MintoMaximum Axial Groove Diameter Max
    Maximum Bore Depth
    Maximum Bore Depth
    • 9.0 in(1)
    • 10.0 in(5)
    Maximum Bore Depth MintoMaximum Bore Depth Max
    Maximum Bore Depth
    Maximum Bore Depth
    • 228.601 mm(1)
    • 254.0 mm(5)
    Maximum Bore Depth MintoMaximum Bore Depth Max
    Front-End
    Cutting Width
    Cutting Width
    • 0.039 in(2)
    • 0.047 in(2)
    • 0.06 in(2)
    • 0.062 in(2)
    • 0.069 in(2)
    • 0.073 in(2)
    • 0.078 in(2)
    • 0.079 in(2)
    • 0.088 in(2)
    • 0.089 in(1)
    • 0.094 in(1)
    • 0.095 in(2)
    • 0.097 in(2)
    • 0.098 in(2)
    • 0.105 in(2)
    • 0.108 in(2)
    • 0.11 in(2)
    • 0.119 in(5)
    • 0.122 in(2)
    • 0.125 in(5)
    • 0.126 in(5)
    • 0.128 in(2)
    • 0.131 in(1)
    • 0.138 in(5)
    • 0.143 in(2)
    • 0.156 in(2)
    • 0.157 in(5)
    • 0.167 in(5)
    • 0.169 in(2)
    • 0.177 in(5)
    • 0.178 in(2)
    • 0.185 in(3)
    • 0.188 in(5)
    • 0.189 in(5)
    • 0.192 in(1)
    • 0.193 in(1)
    • 0.195 in(2)
    • 0.196 in(2)
    • 0.197 in(3)
    • 0.202 in(3)
    • 0.213 in(3)
    • 0.217 in(3)
    • 0.218 in(1)
    • 0.219 in(3)
    • 0.237 in(3)
    • 0.25 in(4)
    • 0.256 in(3)
    • 0.281 in(1)
    • 0.312 in(1)
    • 0.375 in(1)
    • 0.384 in(1)
    Cutting Width MintoCutting Width Max
    Cutting Width
    Cutting Width
    • 1.0 mm(2)
    • 1.201 mm(2)
    • 1.5 mm(2)
    • 1.576 mm(2)
    • 1.75 mm(2)
    • 1.826 mm(2)
    • 1.975 mm(2)
    • 2.0 mm(2)
    • 2.2 mm(2)
    • 2.225 mm(2)
    • 2.25 mm(1)
    • 2.375 mm(1)
    • 2.401 mm(2)
    • 2.475 mm(2)
    • 2.5 mm(2)
    • 2.676 mm(2)
    • 2.75 mm(2)
    • 2.801 mm(2)
    • 3.0 mm(5)
    • 3.1 mm(2)
    • 3.176 mm(5)
    • 3.2 mm(5)
    • 3.25 mm(2)
    • 3.325 mm(1)
    • 3.5 mm(5)
    • 3.6 mm(2)
    • 3.95 mm(2)
    • 3.975 mm(1)
    • 4.0 mm(5)
    • 4.25 mm(5)
    • 4.3 mm(2)
    • 4.5 mm(5)
    • 4.525 mm(2)
    • 4.7 mm(3)
    • 4.775 mm(5)
    • 4.801 mm(5)
    • 4.875 mm(1)
    • 4.9 mm(1)
    • 4.95 mm(2)
    • 4.976 mm(2)
    • 5.0 mm(3)
    • 5.125 mm(3)
    • 5.4 mm(3)
    • 5.5 mm(3)
    • 5.525 mm(1)
    • 5.575 mm(3)
    • 6.0 mm(3)
    • 6.351 mm(4)
    • 6.5 mm(3)
    • 7.125 mm(1)
    • 7.926 mm(1)
    • 9.525 mm(1)
    • 9.75 mm(1)
    Cutting Width MintoCutting Width Max
    Insert Geometry
    Cutting Tool Material
    Cutting Tool Material
    • B H (5)
    • B L (2)
    • C N (5)
    • D P (4)
    • H T (5)
    • H W (6)
    Back-End
    Back-End Diameter
    Back-End Diameter
    • 57.151 mm(1)
    • 63.5 mm(5)
    Back-End Diameter MintoBack-End Diameter Max
    Back-End Diameter
    Back-End Diameter
    • 2.25 in(1)
    • 2.5 in(5)
    Back-End Diameter MintoBack-End Diameter Max
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