YG-1 PRECIZ GMM88 4-Flute Carbide End Mill with 38° Helix Angle and Ultra-Micrograin Carbide for CNC Milling

The YG-1 PRECIZ GMM88 is a high‑performance solid carbide square end mill from YG‑1 (South Korea), optimized for general‑to‑medium machining of carbon steel, alloy steel, and stainless steel (304/316L). It features a 4‑flute design, 38° helix angle, ultra‑micrograin carbide substrate, and multi‑layer PVD coating, delivering high rigidity, smooth chip evacuation, excellent wear resistance, and long tool life in wet/dry CNC milling. Ideal for side milling, face milling, slotting, and profiling in automotive, mold, and general engineering.

• 4‑Flute Square End (GMM88): Balanced rigidity and chip space, ideal for finishing/medium roughing.
• 38° Helix Angle: Reduces cutting force, improves surface finish, suitable for stainless steel.
• Ultra‑Micrograin Carbide: High hardness and toughness, resists chipping in interrupted cuts.
• Premium PVD Coating: Low friction, high oxidation resistance, anti‑built‑up edge in steel/stainless steel.
• Center‑Cutting Capability: Enables direct plunging and slotting.
• Straight Shank: Compatible with standard ER collets and tool holders.
• PRECIZ Series: YG‑1’s high‑precision line for tight tolerance machining.

• Carbon steels (1045, S355, Q235) – primary
• Alloy steels (4140, 42CrMo4, HRC <48)
• Stainless steels (304, 316L, 420) – optimized
• Cast iron (HT200, HT250)
• Non‑ferrous metals (brass, copper, light cuts)

• Square shoulder milling and step profiling
• Face milling (medium depth of cut)
• Precision slotting and pocketing
• Side milling and peripheral finishing
• Dry/wet machining of stainless steel components
• General‑purpose CNC milling in steel and stainless steel

As a versatile 4‑flute end mill for steel and stainless steel, it combines micrograin toughness, 38° helix geometry, and premium PVD coating for stable performance and extended tool life. YG‑1’s world‑class manufacturing ensures consistent quality for mass production and precision machining