MHS - Hardened Steels (35 ~ 55 HRc) Drills

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Mitsubishi Materials USA Corporation introduces the new MHS solid carbide drill for hardened steels between (35 ~ 55 HRc) to our Drilling Family. The MHS type drill is an excellent choice for applications in the die & mold industry, especially ejector pin holes.

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• Available in metric diameters (only) in 0.1mm increments from 3.0mm to 12.0mm
• A total of 544 items available from 1xD ~ 30xD
• Double margin/wider guide pad - stronger drill & higher accuracy/straight hole
• Larger web thickness - increases the overall strength & rigidity of the drill
• Smaller helix angle (25 degrees) - increases the overall strength & rigidity of the drill

• Hardened steels (35 ~ 55 HRc)
• Die & mold applications
• Ejector pin holes

Work Material		Hardness	Drill Diameter
			3.0 - 6.0 mm		6.1 - 10.0 mm		10.1 - 12.0 mm
			Speed (SFM)	Feed (IPR)	Speed (SFM)	Feed (IPR)	Speed (SFM)	Feed (IPR)
H	Heat-Treated Steels Pre-Hardened Steels	35-40 HRc	130-230	.004-.008	130-230	.006-.010	130-230	.008-.012
		40-50 HRc	65-160	.002-.006	65-160	.004-.008	65-160	.006-.010
		50-55 HRc	30-100	.001-.004	30-100	.002-.006	30-100	.002-.008

• Decrease in hole making time after heat treat
• Decrease or eliminate subcontractor machining, therefore, decreasing lead time of manufacturing
• Decrease or eliminate reaming because of the MHS's ability to produce a high accuracy/straight hole

• When using the MHS 10xD ~ 30xD, you must use a starter drill. Please use the MZE-SA or the MHS (1xD or 2xD) drills as your starter drill.

• August 1, 2008