Feature of NS End Mills | Technology

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Sharpened cutting edge realizes excellent surface even if cutting depth of 0.01mm in finish cutting.
One example, drop off of sintered carbide grain is hardly observed at cutting edge of AL3D-2 series for aluminum as shown in below pictures.

· Comparison of droplet on surface


AL3D-2		Competitor A		Competitor B

MACH225 is designed for direct carving with high-speed cutting for hardened steel (over 60HRC). In traditional type of ball end mills, cutting resistance and mechanical shock is big due to its negative rake angle. On the other hand, MACH225 reduces such negative effect by employing sharp & positive rake angle which finally leads to long tool life and bigger depth of cutting.

Comparison of cutting time (Rough cutting by recommended milling condition of each company.)

	Spindle Speed	Feed	Depth of Cut(Ad × Rd)
	min^-1	mm/min	mm
MACH225 1R	20,000	2,000	0.2×0.5
Company A 1R	16,000	800	0.06×0.6
Company B 1R	28,500	2,600	0.04×0.1

Generally cutting edge of end mills for hardened steel is designed with negative lake angle in order to increase chipping resistance. However it effects on cutting accuracy and tool life in worse due to dull cutting edge.

MHD445·E645 brought dramatic improvements in cutting accuracy and tool life by employing special design of cutting edge and high-grade of super-micro grain carbide with higher chipping resistance.