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Top Cut 4™

Top Cut 4™ is a versatile indexable drill  with four true cutting edges on each insert. This drill is capable of supporting a variety of applications including through and cross-hole, inclined entry and exit, 45 degree corner,  half cylindrical, concave, blind, and chain drilling. 

Top Cut 4 is an All-Star tool. 

Order tools with same-day shipping with All-Star! Learn more.

Three Chip Breakers in Four Grades

-V38

First choice for long chipping materials in titanium and stainless steel.

   

Product Features:

  • Standard diameter range covering 12-68mm
  • 4 real cutting edges per insert
  • 4 grades to achieve higher tool life at accelerated speeds: WU25CH, WU40PH, WPK10CH, WN10PH
  • X-offset design to adjust diameter size on turning machines and optimize tolerances on machining centers
  • Coolant channels exit right behind the cutting edge
  • Differentiated insert shapes to avoid grade mixing between central and periphery inserts
  • Optimized flutes to contain chips during machining 
  • Flanged shank to increase the overall drill stability in deep-drilling applications
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Workpiece Material
Workpiece Material
  • P Steel (596)
    • P0
      Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (556)
    • P1
      Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (556)
    • P2
      Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS
      (540)
    • P3
      Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS
      (540)
    • P4
      Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS
      (540)
    • P5
      Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS
      (532)
    • P6
      High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS
      (532)
  • M Stainless Steel (556)
    • M1
      Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS
      (556)
    • M2
      High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS
      (532)
    • M3
      Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS
      (532)
  • K Cast Iron (540)
    • K1
      Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS
      (540)
    • K2
      Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS
      (540)
    • K3
      High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS
      (540)
  • N Non-Ferrous Materials (508)
    • N1
      Wrought Aluminum
      (508)
    • N2
      Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%
      (508)
    • N3
      High-Silicon Aluminum Alloys Si >12.2%
      (508)
  • S High-Temp Alloys (516)
    • S1
      Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS
      (264)
    • S2
      Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS
      (264)
    • S3
      Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS
      (516)
    • S4
      Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS
      (516)
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  • CN (44)
  • DE (251)
  • GB (78)
  • IN (59)
  • SG (251)
  • US (119)
Applications
Applications
  • Convex Drilling Convex Drilling (190)
  • Corner Style SquareEnd Drilling Corner Style SquareEnd Drilling (260)
  • Drilling Drilling (492)
  • Inclined Entry Drilling Inclined Entry Drilling (190)
  • Inclined Exit Drilling Inclined Exit Drilling (190)
  • Stacked Plates Drilling Stacked Plates Drilling (54)
  • X-Offset Drilling X-Offset Drilling (368)
Cutting Diameter
Cutting Diameter
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Cutting Condition
Cutting Condition
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  • Stable (64)
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Maximum Hole Depth [L4]
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