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Tangential Shoulder Milling

  • Mill 4-12KT requires up to 15% less horsepower, enabling increased feed rates, even on small machines.
  • The patented insert design — featuring a triangular shaped margin — provides unprecedented stability in steel and cast iron applications.
  • Excellent floor finishes due to minimal axial runout.
  • With 7 grades, 7 corner radii, and depth-of-cut range up to .472" (12mm), the program offers versatility to cover many shoulder milling applications.

Mill 4-12KT Left-Handed Inserts

For maximum stability and accuracy in custom solution slotting cutters.

Custom solution slotting cutters upon request.

Request More Information

View Mill 4-12KT in Action!

Challenge:

Improve cost-per-part (CPP) by increasing productivity
when milling a dry roughing to finishing application.

Read the full story!

Radially Mounted

Requires large pocket; reduces the core size of the cutter.
Allows very small diameter cutter bodies.
Access to insert screw can be tough.

Tangentially Mounted

A shallow pocket allows for large core size of the cutter.
Very strong cutting edge.
Easy access to insert screw.

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Key Filters
Workpiece Material
  • P Steel (80)
    • P0
      Low-Carbon Steels, Long Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (68)
    • P1
      Low-Carbon Steels, Short Chipping C < .25%; <125 HB; <530 N/mm^2 UTS
      (68)
    • P2
      Medium and High Carbon Steels C < .25%; <220 HB; <25 HRC; >530 N/mm^2 UTS
      (68)
    • P3
      Alloy Steels & Tool Steels C > .25%; <330 HB; <35 HRC; 600-850 N/mm^2 UTS
      (68)
    • P4
      Alloy Steels & Tool Steels C > .25%; 350-420 HB; 35-43 HRC; 850-1400 N/mm^2 UTS
      (68)
    • P5
      Ferritic, Martensitic, and PH Stainless Steels <330 HB; <35 HRC; 600-900 N/mm^2 UTS
      (80)
    • P6
      High Strength Ferritic, Martensitic, and PH Stainless Steels 350-450 HB; 35-43 HRC; 900-2400 N/mm^2 UTS
      (80)
  • M Stainless Steel (80)
    • M1
      Austenitic Stainless Steel 130-200 HB; <600 N/mm^2 UTS
      (80)
    • M2
      High Strength Austenitic Stainless and Cast Stainless Steels 150-230 HB; <25 HRC; >600 N/mm^2 UTS
      (80)
    • M3
      Duplex Stainless Steel 135-275 HB; <30 HRC; 500-1200 N/mm^2 UTS
      (80)
  • K Cast Iron (70)
    • K1
      Gray Cast Iron 120-290 HB; <32 HRC; 125-500 N/mm^2 UTS
      (70)
    • K2
      Low and Medium Strength CGI and Ductile Irons 130-260 HB; <28 HRC; <600 N/mm^2 UTS
      (70)
    • K3
      High Strength Ductile and Austempered Ductile Iron 180-350 HB; <43 HRC; >600 N/mm^2 UTS
      (70)
  • S High-Temp Alloys (80)
    • S1
      Iron-Based, Heat-Resistant Alloys 160-260 HB; 25-48 HRC; 500-1200 N/mm^2 UTS
      (68)
    • S2
      Cobalt-Based, Heat-Resistant Alloys 250-450 HB; 25-48 HRC; 1000-1450 N/mm^2 UTS
      (68)
    • S3
      Nickel-Based, Heat Resistant Alloys 160-450 HB; <48 HRC; 600-1700 N/mm^2 UTS
      (68)
    • S4
      Titanium and Titanium Alloys 300-400 HB; 33-43 HRC; 900-1600 N/mm^2 UTS
      (80)
  • H Hardened Materials (38)
    • H1
      Hardened Materials 44-48 HRC
      (38)
Applications
  • Face Milling Face Milling (28)
  • ID Thread Turning ID Thread Turning (36)
  • Shoulder Milling Shoulder Milling (28)
  • Shoulder Roughing Shoulder Roughing (28)
Cutting Diameter
  • 50.0 (2)
  • 50.8 (2)
  • 63.0 (2)
  • 63.5 (2)
  • 76.2 (2)
  • 80.0 (2)
  • 100.0 (2)
  • 101.6 (2)
  • 125.0 (2)
  • 127.0 (2)
  • 152.4 (2)
  • 160.0 (2)
  • 200.0 (2)
  • 203.2 (2)
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Cutting Diameter
  • 1.9685 (2)
  • 2.0 (2)
  • 2.4803 (2)
  • 2.5 (2)
  • 3.0 (2)
  • 3.1496 (2)
  • 3.937 (2)
  • 4.0 (2)
  • 4.9213 (2)
  • 5.0 (2)
  • 6.0 (2)
  • 6.2992 (2)
  • 7.874 (2)
  • 8.0 (2)
to
Cutting Length
  • 0.4777 (4)
  • 0.4781 (18)
  • 0.4782 (6)
to
Cutting Length
  • 12.135 (4)
  • 12.143 (4)
  • 12.144 (12)
  • 12.145 (4)
  • 12.146 (4)
to
Tool Cutting Edge Angle
  • 90.0 (28)
to
Cutting Edges Per Insert
  • 4.0 (100)
to
Internal Coolant Capability
Corner configuration
Corner Radius
  • 0.397 (36)
  • 0.794 (42)
  • 1.191 (40)
  • 1.558 (42)
  • 1.984 (40)
  • 2.381 (34)
  • 3.175 (34)
to
Corner Radius
  • 0.0156 (36)
  • 0.0312 (42)
  • 0.0469 (40)
  • 0.0625 (42)
  • 0.0781 (40)
  • 0.0938 (34)
  • 0.125 (34)
to
Application
Grade Of Cutting Tool
  • KC522M (38)
  • KC725M (32)
  • KCK15 (38)
  • KCK20 (38)
  • KCK20B (28)
  • KCPK30 (40)
  • KCPM40 (42)
  • KCSM40 (40)
Wiper Insert
  • N (72)
Maximum Ramp Angle
  • 0.008 (4)
  • 0.01 (2)
  • 0.011 (2)
  • 0.013 (4)
  • 0.016 (4)
  • 0.02 (2)
  • 0.021 (2)
  • 0.026 (4)
  • 0.041 (2)
  • 0.042 (2)
to
Front-End
Insert Shape
  • L-RECTANGLE ON EDGE 90 (100)
Insert Geometry
Shape
  • L-RECTANGLE ON EDGE 90 (72)
Cutting Tool Material
  • H W (72)
Chip Breaker CBMD
  • GE (72)
Tolerance Class
  • G (72)
Back-End
Back-End Diameter
  • 0.75 (2)
  • 0.8666 (4)
  • 1.0 (4)
  • 1.0634 (2)
  • 1.25 (2)
  • 1.26 (1)
  • 1.2603 (1)
  • 1.5 (2)
  • 1.575 (3)
  • 1.5753 (1)
  • 2.0 (2)
  • 2.36 (1)
  • 2.363 (1)
  • 2.5 (2)
to
Back-End Diameter
  • 19.05 (2)
  • 22.0 (4)
  • 25.4 (4)
  • 27.0 (2)
  • 31.75 (2)
  • 32.0 (2)
  • 38.1 (2)
  • 40.0 (4)
  • 50.8 (2)
  • 60.0 (2)
  • 63.5 (2)
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other
Grade
  • KC522M (10)
  • KC725M (4)
  • KCK15 (10)
  • KCK20 (10)
  • KCPK30 (12)
  • KCPM40 (14)
  • KCSM40 (12)
Platform
  • Mill 4-12KT (100)
Tool Unit
  • I (86)
  • M (86)
Over All Length [L]
  • 38.1 (2)
  • 40.0 (4)
  • 44.45 (4)
  • 50.0 (4)
  • 50.8 (2)
  • 60.325 (6)
  • 63.0 (6)
to
Over All Length [L]
  • 1.5 (2)
  • 1.5748 (4)
  • 1.75 (4)
  • 1.9685 (4)
  • 2.0 (2)
  • 2.375 (6)
  • 2.4803 (6)
to
Insert Hand
  • L (36)
  • R (36)
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Shoulder Milling

Mill 4™-12KT • Coarse Pitch • Shell Mill
(7 Products)
  • Face MillingFace Milling
  • Milling - Side and FaceMilling - Side and Face
  • Milling - Through CoolantMilling - Through Coolant
View Products
SAP Material Number ISO Catalog Number ANSI Catalog Number [D1] Effective Cutting Diameter [D1] Effective Cutting Diameter [D] Adapter / Shank / Bore Diameter [D] Adapter / Shank / Bore Diameter [D4] Bolt Circle 4 [D4] Bolt Circle 3 [D6] Hub Diameter [D6] Hub Diameter [L] Overall Length [L] Overall Length [AP1MAX] 1st Maximum Cutting Depth [AP1MAX] 1st Maximum Cutting Depth Number of Inserts Weight Kilograms Max RPM
6524753 KT4D050Z04S22LN12 KT4D050Z04S22LN12 50.0000 1.968 22.0 .8666     42.0000 1.653 40.0000 1.574 12.1350 .4777 4 0.29 26000
    6524755 KT4D063Z05S22LN12 KT4D063Z05S22LN12 63.0000 2.480 22.0 .8666     50.0000 1.968 40.0000 1.574 12.1460 .4782 5 0.50 22100
      6524757 KT4D080Z07S27LN12 KT4D080Z07S27LN12 80.0000 3.149 27.0 1.063     60.0000 2.362 50.0000 1.968 12.1450 .4781 7 1.03 19000
        6524759 KT4D100Z09S32LN12 KT4D100Z09S32LN12 100.0000 3.937 32.0 1.26     80.0000 3.149 50.0000 1.968 12.1440 .4781 9 1.51 16600
          6524761 KT4D125Z11S40LN12 KT4D125Z11S40LN12 125.0000 4.921 40.0 1.575     96.8380 3.812 63.0000 2.480 12.1440 .4781 11 2.81 14600
            6524763 KT4D160Z12S40LN12 KT4D160Z12S40LN12 160.0000 6.299 40.0 1.575 66.7000 2.626 90.0000 3.543 63.0000 2.480 12.1440 .4781 12 3.25 12700
              List price:
              Discount: %
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              Replacement This item is not available
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              Shoulder Milling

              Mill 4™-12KT • Medium Pitch • Shell Mill
              (7 Products)
              • Face MillingFace Milling
              • Milling - Side and FaceMilling - Side and Face
              • Milling - Through CoolantMilling - Through Coolant
              View Products
              SAP Material Number ISO Catalog Number ANSI Catalog Number [D1] Effective Cutting Diameter [D1] Effective Cutting Diameter [D] Adapter / Shank / Bore Diameter [D] Adapter / Shank / Bore Diameter [D4] Bolt Circle 4 [D4] Bolt Circle 3 [D6] Hub Diameter [D6] Hub Diameter [L] Overall Length [L] Overall Length [AP1MAX] 1st Maximum Cutting Depth [AP1MAX] 1st Maximum Cutting Depth Number of Inserts Weight Kilograms Max RPM
              6524769 KT4D050Z05S22LN12 KT4D050Z05S22LN12 50.0000 1.968 22.0 .8666     42.0000 1.653 40.0000 1.574 12.1350 .4777 5 0.30 26000
                6524770 KT4D063Z06S22LN12 KT4D063Z06S22LN12 63.0000 2.480 22.0 .8666     50.0000 1.968 40.0000 1.574 12.1460 .4782 6 0.51 22100
                  6524771 KT4D080Z08S27LN12 KT4D080Z08S27LN12 80.0000 3.149 27.0 1.063     60.0000 2.362 50.0000 1.968 12.1450 .4781 8 1.05 19000
                    6524772 KT4D100Z11S32LN12 KT4D100Z11S32LN12 100.0000 3.937 32.0 1.260     80.0000 3.149 50.0000 1.968 12.1440 .4781 11 1.55 16600
                      6524773 KT4D125Z14S40LN12 KT4D125Z14S40LN12 125.0000 4.921 40.0 1.575     96.8380 3.812 63.0000 2.480 12.1440 .4781 14 2.86 14600
                        6524774 KT4D160Z16S40LN12 KT4D160Z16S40LN12 160.0000 6.299 40.0 1.575 66.7000 2.626 90.0000 3.543 63.0000 2.480 12.1440 .4781 16 3.31 12700
                          List price:
                          Discount: %
                          Your price::
                          Replacement This item is not available
                          Replacement Product This item may be available through a distributor
                          Shoulder Milling

                          Mill 4™-12KT • Coarse Pitch • Shell Mill
                          (7 Products)
                          • Face MillingFace Milling
                          • Milling - Side and FaceMilling - Side and Face
                          • Milling - Through CoolantMilling - Through Coolant
                          View Products
                          SAP Material Number ISO Catalog Number ANSI Catalog Number [D1] Effective Cutting Diameter [D1] Effective Cutting Diameter [D] Adapter / Shank / Bore Diameter [D] Adapter / Shank / Bore Diameter [D6] Hub Diameter [D6] Hub Diameter [L] Overall Length [L] Overall Length [AP1MAX] 1st Maximum Cutting Depth [AP1MAX] 1st Maximum Cutting Depth Number of Inserts Weight Pounds Max RPM
                          6524718 KT4D200Z04S075LN12L150 KT4D200Z04S075LN12L150 50.8000 2.000 19.05 .75 44.4500 1.750 38.1000 1.500 12.1350 .4777 4 0.71 25700
                            6524719 KT4D250Z05S100LN12L175 KT4D250Z05S100LN12L175 63.5000 2.500 25.4 1.0 55.5620 2.187 44.4500 1.750 12.1460 .4782 5 1.35 22000
                              6524720 KT4D300Z07S100LN12L175 KT4D300Z07S100LN12L175 76.2000 3.000 25.4 1.0 55.5620 2.187 44.4500 1.750 12.1450 .4782 7 1.87 19600
                                6524731 KT4D400Z09S125LN12L200 KT4D400Z09S125LN12L200 101.6000 4.000 31.75 1.25 73.0250 2.875 50.8000 2.000 12.1440 .4781 9 3.23 16500
                                  6524732 KT4D500Z11S150LN12L238 KT4D500Z11S150LN12L238 127.0000 5.000 38.1 1.5 96.8380 3.812 60.3250 2.375 12.1440 .4781 11 5.80 14500
                                    6524733 KT4D600Z12S200LN12L238 KT4D600Z12S200LN12L238 152.4000 6.000 50.8 2.0 123.8250 4.875 60.3250 2.375 12.1440 .4781 12 9.25 13000
                                      List price:
                                      Discount: %
                                      Your price::
                                      Replacement This item is not available
                                      Replacement Product This item may be available through a distributor
                                      Shoulder Milling

                                      Mill 4™-12KT • Medium Pitch • Shell Mill
                                      (7 Products)
                                      • Face MillingFace Milling
                                      • Milling - Side and FaceMilling - Side and Face
                                      • Milling - Through CoolantMilling - Through Coolant
                                      View Products
                                      SAP Material Number ISO Catalog Number ANSI Catalog Number [D1] Effective Cutting Diameter [D1] Effective Cutting Diameter [D] Adapter / Shank / Bore Diameter [D] Adapter / Shank / Bore Diameter [D6] Hub Diameter [D6] Hub Diameter [L] Overall Length [L] Overall Length [AP1MAX] 1st Maximum Cutting Depth [AP1MAX] 1st Maximum Cutting Depth Number of Inserts Weight Pounds Max RPM
                                      6524735 KT4D200Z05S075LN12L150 KT4D200Z05S075LN12L150 50.8000 2.000 19.05 .75 44.4500 1.750 38.1000 1.500 12.1350 .4777 5 0.74 25700
                                        6524736 KT4D250Z06S100LN12L175 KT4D250Z06S100LN12L175 63.5000 2.500 25.4 1.0 55.5620 2.187 44.4500 1.750 12.1460 .4782 6 1.38 22000
                                          6524737 KT4D300Z08S100LN12L175 KT4D300Z08S100LN12L175 76.2000 3.000 25.4 1.0 55.5620 2.187 44.4500 1.750 12.1450 .4782 8 1.91 19600
                                            6524738 KT4D400Z11S125LN12L200 KT4D400Z11S125LN12L200 101.6000 4.000 31.75 1.25 73.0250 2.875 50.8000 2.000 12.1440 .4781 11 3.32 16500
                                              6524739 KT4D500Z14S150LN12L238 KT4D500Z14S150LN12L238 127.0000 5.000 38.1 1.5 96.8380 3.812 60.3250 2.375 12.1440 .4781 14 5.92 14500
                                                6524740 KT4D600Z16S200LN12L238 KT4D600Z16S200LN12L238 152.4000 6.000 50.8 2.0 123.8250 4.875 60.3250 2.375 12.1440 .4781 16 9.41 13000
                                                  List price:
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                                                  Replacement This item is not available
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                                                  Slotting Mills

                                                  Mill 4™-12KT • LNGQ12-KT4 • IC12 • Left Handed Inserts
                                                  (36 Products)
                                                  View Products
                                                  SAP Material Number ISO Catalog Number ANSI Catalog Number Grade [LI] Insert Length [LI] Insert Length [S] Insert Thickness [S] Insert Thickness [W] Insert Width [W] Insert Width [Rε] Corner Radius [Rε] Corner Radius Cutting Edges per Insert
                                                  6723710 LNGQ120604ELGEKT4 LNGQ120604ELGEKT4 KCK15 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                    6723721 LNGQ120604ELGEKT4 LNGQ120604ELGEKT4 KCK20 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                      6723709 LNGQ120604ELGEKT4 LNGQ120604ELGEKT4 KC522M 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                        6723722 LNGQ120604ELGEKT4 LNGQ120604ELGEKT4 KCPM40 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                          6723724 LNGQ120608ELGEKT4 LNGQ120608ELGEKT4 KCK15 13.0000 .5118 6.3500 .2500 13.3850 .5270 0.7940 .0312 4
                                                            6723725 LNGQ120608ELGEKT4 LNGQ120608ELGEKT4 KCK20 13.0000 .5118 6.3500 .2500 13.3850 .5270 0.7940 .0312 4
                                                              List price:
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                                                              Your price::
                                                              Replacement This item is not available
                                                              Replacement Product This item may be available through a distributor
                                                              Shoulder Milling

                                                              Mill 4™-12KT • Inserts
                                                              (36 Products)
                                                              View Products
                                                              SAP Material Number ISO Catalog Number ANSI Catalog Number Grade [LI] Insert Length [LI] Insert Length [S] Insert Thickness [S] Insert Thickness [W] Insert Width [W] Insert Width [Rε] Corner Radius [Rε] Corner Radius Cutting Edges per Insert
                                                              6525559 LNGQ120604ERGEKT4 LNGQ120604ERGEKT4 KCK15 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                                6525560 LNGQ120604ERGEKT4 LNGQ120604ERGEKT4 KCK20 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                                  6525691 LNGQ120604ERGEKT4 LNGQ120604ERGEKT4 KCPM40 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                                    6525558 LNGQ120604ERGEKT4 LNGQ120604ERGEKT4 KC522M 13.0000 .5118 6.3500 .2500 13.5040 .5316 0.3970 .0156 4
                                                                      6525753 LNGQ120608ERGEKT4 LNGQ120608ERGEKT4 KCPK30 13.0000 .5118 6.3500 .2500 13.3850 .5270 0.7940 .0312 4
                                                                        6525751 LNGQ120608ERGEKT4 LNGQ120608ERGEKT4 KCK15 13.0000 .5118 6.3500 .2500 13.3850 .5270 0.7940 .0312 4
                                                                          List price:
                                                                          Discount: %
                                                                          Your price::
                                                                          Replacement This item is not available
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