Square Endmill Selection Guide A:First Recommendation G: Optimal S: Suitable Blank: Not recommended H: Unsuitable Flute Length/ Work Material Type P H M S K N Application Diameter Long Neck / Relief Shank Product Type Coating / Cutting Edge General Structure Rolled Steel Tempered Steel / Die Steel Hardened Steel Ti Alloy / Heat Resistant Alloy · No. of DC Extra-Long Series · Grades Appearance Pre-hardened Steel Feature Flutes (Min to Max) Series Aluminum Alloy (mm) Long Series Medium Standard Short Flute (Ref. Page) Carbon Steel Alloy Steel 30 to 45 HRC 45 to 55 HRC 55 to 60 HRC From 60 HRC Stainless Steel Cast Iron Copper Alloy Graphite CFRP ø1 to 25 GSXMILL 2 Flutes A A A A A A S A S A GSX 20000C → I20 Coated GSXMILL 2 Flutes Carbide ø1 to 20 GSX 20000S → I22 S G G G G G S G S S ø0.2 to 30 Solid Carbide Spiral 2 Flutes S G S S SSM 2000 → I112 Extra-Long Series Carbide ø3 to 25 Solid Carbide Spiral 2 Flutes S G S S ELSM 2000 → I118 General ø1 to 20 GSXMILL 3 Flutes Coated S G G G G G G S S Purpose GSX 30000C → I36 Carbide ø1 to 25 GSXMILL 4 Flutes A A A A A A S A S A GSX 40000C → I44 Coated GSXMILL 4 Flutes Carbide ø1 to 20 GSX 40000S → I46 S G G G G G S G S S ø1.5 to 25 Solid Carbide Spiral 4 Flutes S G S S SSM 4000 → I122 Extra-Long Series Carbide ø3 to 25 Solid Carbide Spiral 4 Flutes S G S S ELSM 4000 → I126 ø2 to 25 GSV Type Anti-vibration 4 Flutes G G G G G G S G S S GSV 4000 → I50 I ø2 to 25 GSX MILL Anti-vibration 4 Flutes A A A A A A S A S S High GSXVL 4000 → I52 Coated Endmills Efficiency UPMILL Carbide ø2 to 20 SSUP 4000ZX → I78 G G G G G S G S S ø3 to 20 Relief Shank UPMILL Deep Shoulder G G G G G G S G S S Square SSUPR 4000ZX→ I79 SUMIBORON 2 Flutes ø6 to 16 Helical Master BNES Type S S G G H H BNES → I140 3 Flutes GSMILL HARD GS ø1 to 20 HARD 4 Flutes GSH 4/6/8000SF→ I66 A A A A A A A 6 Flutes HARD 8 Flutes Hardened ø3 to 32 S S S G G G G Steel HHM 4/6/8000ZX→ I69 Radius Coated Long Hard Carbide Ballnose ø3 to 32 LHHM 4/6/8000ZX→ I72 S S S G G G S DLC ø3 to 32 Extra-Long Hard EHHM 4/6/8000ZX → I75 S S S G G G S SUMIDIA Coat Long Roughing ø6 to 20 GSMILL Roughing Coated G G G G G G G S G Neck GSRE 4000SF → I64 Carbide Uncoated CBN PCD I2