Coated Carbide Drills for Steel & Cast Iron MDH Series
Low cutting resistance stabilizes
high-efficiency drilling
D Wide chip pocket enables smooth chip evacuation and reduced cutting resistance ensuring stable drilling even in high-efficiency conditions
RP THINING
MDH Series
Conventional Tool
3,000
3,000
f = .0098 IPR f = .0197 IPR
f = .0098 IPR f = .0197 IPR
2,500
2,500
2,000
2,000
1,500
1,500
1,000
1,000
500
500
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Drilling Time (sec)
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 Drilling Time (sec)
0
Work Material: 1050 Steel Tool: MDH0800S08H05 Cutting Conditions: vc = 265 SFM H = 1.496” (Through)
Wet (Water-soluble, Internal Coolant Supply)
Fracture resistant even in high-efficiency drilling
New Cutting Edge Shape
D Optimized cutting edge shape suppresses stress concentration and prevents chipping even in high-efficiency drilling with high cutting edge load
Von Mises Stress (MPa) 3,500
MDH Series
Conventional Tool
0
MDH Series
MDH Series Conventional Tool
Able to Continue
Tool Life Over 2.5 Times Longer
Fracture
65
130
195
260
325
390
After Drilling 365 feet
Drilling Distance (Feet)
Work Material: 1050 Steel Tool: MDH0800S08H05 Cutting Conditions: vc = 465 SFM f = .0157 IPR H = 1.496” (Through) Wet (Water-soluble, Internal Coolant Supply)
2
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