Flat Bottom Drills MDF Series (External Coolant Supply)
Recommended Cutting Conditions
1. The recommended hole depth is 2 x DC. The depth is measured from the highest point of the hole when drilling in inclined surfaces. 2. The recommended cutting conditions are those for drilling in flat horizontal surfaces. 3. Adjust the feed rate according to the inclination angle when drilling in an inclined surface.
4. Set the feed rate at 70% or lower when the inclination angle is 30° or less. 5. Set the feed rate at 50% or lower when the inclination angle is larger than 30°. 6. This product is a drilling tool. Do not use it for traverse cutting or helical milling. ( v c : Cutting Speed (SFM), f : Feed Rate (IPR))
Dia. DC ( mm )
Cutting Conditions
Mild Steel/General Steel (up to 250HB)
Alloy Steel (up to 300HB)
Hardened Steel (up to 50HRC)
Stainless Steel (up to 200HB)
Gray Cast Iron FC250
Ductile Cast Iron FCD450
Aluminum Alloy 225 - 380
115 - 190
115 - 150
60 - 95
60 - 95
115 - 190
75 - 150
v c
ø0.5
f .0001 - .0002 .0001 - .0002 .0001 - .0002 .0001 - .0002 .0001 - .0002 .0001 - .0003 .0001 - .0003 ø1.0 v c 170 - 250 130 - 210 75 - 150 75 - 115 170 - 250 115 - 190 300 - 450 f .0004 - .0024 .0004 - .0024 .0001 - .0004 .0002 - .0004 .0004 - .0020 .0002 - .0006 .0004 - .0012 ø2.0 v c 190 - 270 150 - 230 75 - 150 75 - 150 190 - 270 170 - 250 340 - 500 f .0008 - .0024 .0008 - .0024 .0004 - .0010 .0004 - .0008 .0079 - .0024 .0006 - .0018 .0012 - .0028 ø4.0 v c 230 - 340 190 - 300 75 - 150 75 - 150 230 - 340 210 - 290 340 - 500 f .0024 - .0039 .00020 - .0039 0.0004 - .0012 .0004 - .0012 .0024 - .0047 .0016 - .0031 .0024 - .0039 ø6.0 v c 230 - 340 190 - 300 75 - 150 75 - 190 230 - 340 230 - 300 340 - 500 f .0020 - .0059 .0020 - .0059 .0016 - .0031 .0012 - .0020 .0020 - .0059 .0024 - .0047 .0020 - .0059 ø8.0 v c 230 - 340 190 - 300 75 - 150 75 - 190 230 - 340 230 - 300 340 - 500 f .0039 - .0079 .0039 - .0079 .0024 - .0039 .0016 - .0024 .0039 - .0079 .0039 - .0059 .0039 - .0079 ø10.0 v c 230 - 340 190 - 300 75 - 150 75 - 190 230 - 340 230 - 300 340 - 500 f .0047 - .0086 .0047 - .0086 .0031 - .0039 .0031 - .0047 .0047 - .0086 .0047 - .0071 .0047 - .0086 ø12.0 v c 230 - 340 190 - 300 75 - 150 75 - 190 230 - 340 230 - 300 340 - 500 f .0059 - .0098 .0059 - .0098 .0047 - .0070 .0024 - .0039 .0059 - .0098 .0059 - .0079 .0059 - .0098 ø16.0 v c 230 - 340 190 - 300 75 - 150 75 - 190 230 - 340 230 - 300 340 - 500 f .0079 - .0118 .0079 - .0118 .0055 - .0079 .0039 - .0079 .0067 - .0106 .0059 - .0098 .0079 - .0118 ø20.0 v c 230 - 340 190 - 300 75 - 150 75 - 190 230 - 340 230 - 300 340 - 500 f .0098 - .0138 .0098 - .0138 .0063 - .0086 .0059 - .0098 .0098 - .0138 .0079 - .0118 .0098 - .0138 Min. - Max.
J
J50
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