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 60 - 100
30 - 50
30 - 40
15 - 25
15 - 25
30 - 50
20 - 40
v c
ø0.5
f .0001 - .0002 .0001 - .0002 .0001 - .0002 .0001 - .0002 .0001 - .0002 .0001 - .0003 .0001 - .0003 ø1.0 v c 45 - 65 35 - 55 20 - 40 20 - 30 45 - 65 30 - 50 80 - 120 f .0004 - .0024 .0004 - .0024 .0001 - .0004 .0002 - .0004 .0004 - .0020 .0002 - .0006 .0004 - .0012 ø2.0 v c 50 - 70 40 - 60 20 - 40 20 - 40 50 - 70 45 - 65 90 - 130 f .0008 - .0024 .0008 - .0024 .0004 - .0010 .0004 - .0008 .0079 - .0024 .0006 - .0018 .0012 - .0028 ø4.0 v c 60 - 90 50 - 80 20 - 40 20 - 40 60 - 90 55 - 75 90 - 130 f .0024 - .0039 .00020 - .0039 0.0004 - .0012 .0004 - .0012 .0024 - .0047 .0016 - .0031 .0024 - .0039 ø6.0 v c 60 - 90 50 - 80 20 - 40 20 - 50 60 - 90 60 - 80 90 - 130 f .0020 - .0059 .0020 - .0059 .0016 - .0031 .0012 - .0020 .0020 - .0059 .0024 - .0047 .0020 - .0059 ø8.0 v c 60 - 90 50 - 80 20 - 40 20 - 50 60 - 90 60 - 80 90 - 130 f .0039 - .0079 .0039 - .0079 .0024 - .0039 .0016 - .0024 .0039 - .0079 .0039 - .0059 .0039 - .0079 ø10.0 v c 60 - 90 50 - 80 20 - 40 20 - 50 60 - 90 60 - 80 90 - 130 f .0047 - .0086 .0047 - .0086 .0031 - .0039 .0031 - .0047 .0047 - .0086 .0047 - .0071 .0047 - .0086 ø12.0 v c 60 - 90 50 - 80 20 - 40 20 - 50 60 - 90 60 - 80 90 - 130 f .0059 - .0098 .0059 - .0098 .0047 - .0070 .0024 - .0039 .0059 - .0098 .0059 - .0079 .0059 - .0098 ø16.0 v c 60 - 90 50 - 80 20 - 40 20 - 50 60 - 90 60 - 80 90 - 130 f .0079 - .0118 .0079 - .0118 .0055 - .0079 .0039 - .0079 .0067 - .0106 .0059 - .0098 .0079 - .0118 ø20.0 v c 60 - 90 50 - 80 20 - 40 20 - 50 60 - 90 60 - 80 90 - 130 f .0098 - .0138 .0098 - .0138 .0063 - .0086 .0059 - .0098 .0098 - .0138 .0079 - .0118 .0098 - .0138 Min. - Max.
J
J50
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