Каталог Sumitomo монолитные фрезы - страница 20

Endmills for Hardened Steel

GS MILL HARD Series

■ Characteristics

GS MILL HARD (Square / Ballnose / Radius)

• With the high-Al content Al-Ti-Cr coating, GS Hard Coat, oxidation resistance is now 3 times higher than the conventional grade at 1,100°C. This improves thermal and wear resistance in ultra-high-speed machining.
• The coating surface roughness is similar to that of the conventional GS Coat, which reduces cutting friction while enhancing smooth cutting.
• Ultra-fine grained carbide substrate with low cobalt content has been newly developed to improve substrate strength. This increases tool durability and prevents the microplastic deformation of the cutting edge that occurs during ultra-high-speed machining.
• New unique cross-sectional design promotes better chip evacuation and tool rigidity.
• Hard (Radius) / New endmill series with improved fracture resistance.
• Hard (Ballnose) / Utilizes a new coating with excellent lubricity as well as thermal resistance. Achieves precision finishing of hardened steel, with a precise radial tolerance of +3 to -7μm and a seamless ball-to-periphery profile.

Seamless ball-toperiphery profile

Side Milling of SKD61 (53HRC) with GS MILL Hard Radius Radius Precision ＋3 to -7μｍ

■ Series

• GS MILL HARD (Square/Ballnose)
• GS MILL HARD (Radius)

GSH 6000SF-R 6 Flutes GSH 8000SF-R 8 Flutes

I

■GS MILL HARD (Square)

• 160

Cutting Performance (6 Flutes, ø10 Side Face Milling) Units (mm) 140 Corner Wear Work Material: SKD61（53HRC）

0.2 GS MILL HARD Competitor's Product

Ballnose (Square) DLC ■ GS MILL HARD (Ballnose) SUMIDIA

Coat Application Example(Automotive Component Precision Forging Die) Units (mm) Long Very small wear Neck Work Material: SKH51（62HRC）

CBN （ ）

PCD Cutting Conditions: v =75m/min n=4,000min-1 c n=4,000min-1 f =0.075 mm/t（f=600mm/min） Tip is worn flat

z a = 0.16mmࠉࠉ p =1mm p f

Competitor’s Product