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Take your shop to the next level. See Promotions
For US customers, a tariff surcharge will be added to your order for metal cutting products.

Excellent surface quality and higher metal removal rates

The unique design allows to apply the tool in multiple passes, called “step down”.

Most tools leave tool marks with every pass they take, resulting in unsatisfactory or low-quality wall finishes. This usually requires another finishing pass at the very end of the process.

Mill 4-15 eliminates that finishing pass with an additional tool, saving time and money.

Features & Benefits

  • Double sided insert with 4 strong cutting edges per insert.
  • Low cutting forces due to highly positive geometry.
  • Applicable in steel, cast iron, stainless steel, non-ferrous materials, and high-temperature alloys. For roughing and finishing.
  • 90º shoulder milling with excellent wall and surface finish capabilities.
  • SGE-H geometry for helical milling. Cutter bodies available upon request.
  • Step down capability providing excellent wall and surface finishes.
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  • X Grade Of Cutting Tool: KCK20B
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Workpiece Material
Workpiece Material
  • P Steel (72)
    • P0
      Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(72)
    • P1
      Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS(72)
    • P2
      Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS(72)
    • P3
      Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS(72)
    • P4
      Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS(72)
    • P5
      Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS(72)
    • P6
      High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS(72)
  • M Stainless Steel (72)
    • M1
      Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS(72)
    • M2
      High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS(72)
    • M3
      Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS(72)
  • K Cast Iron (83)
    • K1
      Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS(83)
    • K2
      Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS(83)
    • K3
      High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS(83)
  • N Non-Ferrous Materials (72)
    • N1
      Wrought Aluminum (72)
    • N2
      Low-Silicon Aluminum Alloys and Magnesium Alloys Si <12.2%(72)
    • N3
      High-Silicon Aluminum Alloys Si >12.2%(72)
  • S High-Temp Alloys (72)
    • S1
      Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS(72)
    • S2
      Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS(72)
    • S3
      Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS(72)
    • S4
      Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS(72)
  • H Hardened Materials (72)
    • H1
      Hardened Materials 44-48 HRC(72)
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Applications
Applications
  • Face MillingFace Milling (72)
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Cutting Diameter
Cutting Diameter
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Cutting Diameter MintoCutting Diameter Max
Cutting Length
Cutting Length
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Cutting Length MintoCutting Length Max
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Reach
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  • 18.045 mm(3)
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Reach MintoReach Max
Tool Cutting Edge Angle
Tool Cutting Edge Angle
  • 90.0 (72)
Tool Cutting Edge Angle MintoTool Cutting Edge Angle Max
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Connection Style
  • 2 Key & Cutter Retention Screw (2)
  • 2 Key & Socket Head Cap Screw (1)
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Number of Flutes
Number of Flutes
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Internal Coolant Capability
Internal Coolant Capability
Over All Length [L]
Over All Length [L]
  • 39.986 mm(2)
  • 40.0 mm(6)
  • 40.005 mm(6)
  • 44.45 mm(4)
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  • 50.021 mm(1)
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Over All Length [L] MintoOver All Length [L] Max
Corner configuration
Corner Radius
Corner Radius
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Corner Radius
Corner Radius
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  • 0.063 in(74)
  • 0.064 in(73)
  • 0.079 in(72)
Corner Radius MintoCorner Radius Max
Application
Grade Of Cutting Tool
KCK20B ;
  • KC422M (74)
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Front-End
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Center Cutting
Center Cutting
Insert Geometry
Shape
Shape
  • X-RECTANGLE MILL 4 90 (11)
Chip Breaker CBMD
Chip Breaker CBMD
  • GE (8)
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  • H W (11)
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  • CYLINDRICAL (24)
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Back-End Diameter
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Back-End Diameter MintoBack-End Diameter Max
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Mill 4-15™ • Four Cutting Edges • Ap1 max 15mm
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Cutters Mill 4-15™ • Metric
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Cutters Mill 4-15™ • Metric

Cutters Mill 4-15™ • Inch
(35)

Cutters Mill 4-15™ • Inch

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Inserts Mill 4-15™

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