GSX MILL Endmills (2 Flutes) 2 GSX 20000C-4D Type Flutes 2 Coated Carbide Carbon Steel Alloy Steel Pre-hardened Tempered Steel Die Steel Hardened Steel Stainless Ti Alloy Heat Resistant A loy Cast Iron Aluminum Copper Alloy Graphite CFRP Steel 45 to 55 55 to 60 60 to 65 Steel Alloy HRC HRC HRC Flutes S G G G G G S G S S Coating Corner Side Milling Groove Finishing Face Milling Spot Facing DC DMM h5 30° APMX DC Tolerance LU D ≤ 3.0 0 –0.015 LF 3.0 < D ≤ 12 0 –0.020 Helix Angle 12.0 < D 0 –0.030 ■ Body  Dimensions (mm) Cat. No. Stock Cutting diameter Depth of cut Cutting Edge Length Total Length Shank diameter DC APMX LU LF DMM GSX 20050C-4D D 0.5 2.0 2.4 40 4 20100C-4D D 1.0 4.0 5.0 40 4 20150C-4D D 1.5 6.0 7.0 40 4 20200C-4D D 2.0 8.0 9.0 40 4 20250C-4D D 2.5 10.0 11.0 50 4 GSX 20300C-4D D 3.0 12.0 13.5 50 6 20350C-4D D 3.5 14.0 15.5 50 6 20400C-4D D 4.0 16.0 17.5 50 6 20450C-4D D 4.5 18.0 19.5 60 6 20500C-4D D 5.0 20.0 22.0 60 6 GSX 20550C-4D D 5.5 22.0 24.0 60 6 20600C-4D D 6.0 24.0 Q 60 6 20650C-4D D 6.5 26.0 28.0 70 8 20700C-4D D 7.0 28.0 30.0 80 8 20750C-4D D 7.5 30.0 32.0 80 8 GSX 20800C-4D D 8.0 32.0 Q 80 8 20850C-4D D 8.5 34.0 36.0 90 10 20900C-4D D 9.0 36.0 38.0 90 10 20950C-4D D 9.5 38.0 40.0 90 10 21000C-4D D 10.0 40.0 Q 90 10 GSX 21050C-4D D 10.5 42.0 44.5 100 12 I 21100C-4D D 11.0 44.0 46.5 100 12 21150C-4D D 11.5 46.0 48.5 100 12 21200C-4D D 12.0 48.0 Q 100 12 Coated Endmills 21300C-4D D 13.0 52.0 55.5 110 16 GSX 21400C-4D D 14.0 56.0 59.5 120 16 21500C-4D D 15.0 60.0 63.5 120 16 21600C-4D D 16.0 64.0 Q 120 16 Square 21700C-4D D 17.0 68.0 72.5 130 20 21800C-4D D 18.0 72.0 76.5 130 20 2 Flutes GSX 21900C-4D D 19.0 76.0 80.5 140 20 3 Flutes 22000C-4D D 20.0 80.0 Q 140 20 22500C-4D D 25.0 100.0 Q 160 25 4 Flutes Grade: ACF20 6 Flutes 8 Flutes Radius ■ Endmill Identification (GSXMILL Series Only) Ballnose GSX 2 0100 C - 4D DLC ① ② ③ ④ ⑤ Series Code No. of Flutes Diameter Cutting Edge Cutting Edge Length SUMIDIA (S: Sharp Edge Coat C: Gash Land Long Neck Uncoated CBN PCD I34 Dmark: Standard stocked item (expanded item)