Counterboring Tools
Counterboring tools and drilling inserts are designed for creating precise and accurate holes of any diameter. The STS toolholders are available in Whistle Notch™ and Weldon™ shanks and are great for steel, stainless steel, cast iron, non-ferrous materials, high-temp alloys, and hardened materials. CTR™ counterboring tools are designed for high-production screw-head counterbores and similar counterboring operations. They have unequal insert positioning and flutes. Kennametal’s CTR double-sided drilling inserts are known for their high performance and durability.
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Filters
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Workpiece Material
Workpiece Material
- P Steel (92)
- P0Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(92)
- P1Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(92)
- P2Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(92)
- P3Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(92)
- P4Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(92)
- P5Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(92)
- P6High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(92)
- M Stainless Steel (92)
- M1Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(92)
- M2High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(92)
- M3Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(92)
- K Cast Iron (110)
- K1Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(110)
- K2Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(110)
- K3High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(110)
- N Non-Ferrous Materials (64)
- N1Wrought Aluminum (64)
- N2Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%(64)
- N3High-Silicon Aluminum Alloys Si >12.2%(60)
- N4Copper, Brass, Zinc-based on machinability index range of 70-100 (64)
- N5Nylon, Plastics, Rubbers, Phenolics, Resins, Fiberglass (64)
- N6Carbon, Graphite Composites, CFRP (64)
- N7MMC's (59)
- S High-Temp Alloys (91)
- S1Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS(91)
- S2Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(91)
- S3Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(91)
- S4Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(91)
- H Hardened Materials (51)
- H1Hardened Materials 44-48 HRC(51)
- H2Hardened Materials 48-55 HRC(51)
- H3Hardened Materials 56-60 HRC(51)
- H4Hardened Materials >60 HRC(51)
Applications
Applications
Counterboring (35)
Drilling (35)
Cutting Diameter
Cutting Diameter
- 0.5959 in(1)
- 0.6352 in(1)
- 0.6746 in(1)
- 0.714 in(2)
- 0.7939 in(1)
- 0.794 in(1)
- 0.8125 in(1)
- 0.8333 in(2)
- 0.8726 in(1)
- 0.873 in(1)
- 0.912 in(2)
- 0.951 in(1)
- 0.9514 in(1)
- 0.9907 in(2)
- 1.0 in(1)
- 1.03 in(1)
- 1.0695 in(1)
- 1.109 in(1)
- 1.1875 in(1)
- 1.188 in(1)
- 1.268 in(1)
- 1.307 in(1)
- 1.3463 in(1)
- 1.3856 in(1)
- 1.425 in(1)
- 1.5037 in(1)
- 1.582 in(1)
- 1.625 in(1)
- 1.661 in(1)
- 1.819 in(1)
- 2.0 in(1)
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Cutting Diameter
Cutting Diameter
- 15.135 mm(1)
- 16.135 mm(1)
- 17.135 mm(1)
- 18.135 mm(2)
- 20.165 mm(2)
- 20.637 mm(1)
- 21.165 mm(2)
- 22.165 mm(2)
- 23.165 mm(2)
- 24.165 mm(2)
- 25.165 mm(2)
- 25.4 mm(1)
- 26.165 mm(1)
- 27.165 mm(1)
- 28.165 mm(1)
- 30.162 mm(1)
- 30.165 mm(1)
- 32.195 mm(1)
- 33.195 mm(1)
- 34.195 mm(1)
- 35.195 mm(1)
- 36.195 mm(1)
- 38.195 mm(1)
- 40.195 mm(1)
- 41.275 mm(1)
- 42.195 mm(1)
- 46.195 mm(1)
- 50.8 mm(1)
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Cutting Condition
Cutting Condition
- Interrupted (23)
- Stable (75)
- Unstable (23)
Maximum Hole Depth [L4]
Maximum Hole Depth [L4]
- 8.5 mm(2)
- 11.0 mm(1)
- 12.7 mm(1)
- 13.5 mm(3)
- 15.875 mm(1)
- 16.0 mm(7)
- 18.5 mm(1)
- 19.05 mm(1)
- 21.0 mm(3)
- 23.0 mm(2)
- 23.5 mm(3)
- 25.4 mm(1)
- 25.5 mm(3)
- 27.5 mm(1)
- 30.0 mm(1)
- 30.5 mm(1)
- 31.75 mm(1)
- 33.5 mm(2)
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Maximum Hole Depth [L4]
Maximum Hole Depth [L4]
- 0.3346 in(2)
- 0.4331 in(1)
- 0.5 in(1)
- 0.5315 in(3)
- 0.625 in(1)
- 0.6299 in(7)
- 0.7283 in(1)
- 0.75 in(1)
- 0.8268 in(3)
- 0.9055 in(2)
- 0.9252 in(3)
- 1.0 in(1)
- 1.0039 in(3)
- 1.0827 in(1)
- 1.1811 in(1)
- 1.2008 in(1)
- 1.25 in(1)
- 1.3189 in(2)
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Connection Style
Connection Style
- Weldon (5)
- Whistle Notch 2 (30)
Number of Flutes
Number of Flutes
- 2 (12)
- 3 (23)
Cutting Edges Per Insert
Cutting Edges Per Insert
- 2.0 (111)
- 4.0 (35)
to
Internal Coolant Capability
Internal Coolant Capability
Over All Length [L]
Over All Length [L]
- 3.189 in(2)
- 3.3858 in(9)
- 3.5 in(2)
- 3.5827 in(4)
- 3.7795 in(4)
- 3.9764 in(4)
- 4.0 in(1)
- 4.3701 in(2)
- 4.5 in(2)
- 4.5669 in(1)
- 4.7638 in(2)
- 4.9606 in(2)
to
Over All Length [L]
Over All Length [L]
- 81.0 mm(2)
- 86.0 mm(9)
- 88.91 mm(2)
- 91.0 mm(4)
- 96.0 mm(4)
- 101.0 mm(4)
- 101.61 mm(1)
- 111.0 mm(2)
- 114.31 mm(2)
- 116.0 mm(1)
- 121.0 mm(2)
- 126.0 mm(2)
to
Corner Radius
Corner Radius
- 0.008 in(3)
- 0.016 in(34)
- 0.024 in(4)
- 0.031 in(15)
- 0.039 in(6)
- 0.047 in(6)
- 0.063 in(5)
- 0.079 in(3)
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Corner Radius
Corner Radius
- 0.2 mm(3)
- 0.4 mm(34)
- 0.6 mm(4)
- 0.8 mm(15)
- 1.0 mm(6)
- 1.2 mm(6)
- 1.6 mm(5)
- 2.0 mm(3)
to
Corner Chamfer
Corner Chamfer
- 0.0 mm(76)
to
Corner Chamfer
Corner Chamfer
- 0.0 in(76)
to
Application
Minimum Depth of Cut
Minimum Feed
Minimum Feed
Grade Of Cutting Tool
Grade Of Cutting Tool
- CS5 (23)
- KC7140 (39)
- KC720 (13)
- KC7215 (67)
- KCMS35 (13)
- KCPK10 (41)
- KCU25 (48)
- KCU40 (49)
- KM1 (41)
Hand Of Tool
Hand Of Tool
- R (35)
Wiper Insert
Wiper Insert
- N (76)
Drill Type
Drill Type
- 86-04 (35)
Insert Geometry
Shape
Shape
- S-SQUARE 90 (76)
Insert IC Size
Insert IC Size
- 6.35 mm(13)
- 7.937 mm(16)
- 9.525 mm(20)
- 12.7 mm(18)
- 15.875 mm(9)
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Insert IC Size
Insert IC Size
- 0.25 in(13)
- 0.3125 in(16)
- 0.375 in(20)
- 0.5 in(18)
- 0.625 in(9)
to
Cutting Edge Length
Cutting Edge Length
- 6.35 mm(13)
- 7.937 mm(16)
- 9.525 mm(20)
- 12.7 mm(27)
to
Cutting Edge Length
Cutting Edge Length
- 0.25 in(13)
- 0.3125 in(16)
- 0.375 in(20)
- 0.5 in(27)
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Chip Breaker CBMD
Chip Breaker CBMD
- 20 (33)
- 21 (30)
- 22 (4)
Cutting Tool Material
Cutting Tool Material
- H W (76)
Tolerance Class
Tolerance Class
- H (12)
Back-End
Connection Type
Connection Type
- CYLINDRICAL (35)
Back-End Diameter
Back-End Diameter
- 19.05 mm(2)
- 20.0 mm(23)
- 25.4 mm(2)
- 31.75 mm(1)
- 32.0 mm(7)
to
Back-End Diameter
Back-End Diameter
- 0.75 in(2)
- 0.7874 in(23)
- 1.0 in(2)
- 1.25 in(1)
- 1.2598 in(7)
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