Flat Bottom Drills MDF Series Long shanked (L2D) styles are available for flat base drilling, hole expansion and burr control in long overhang conditions.
● For drilling with long overhang and to avoid interference with the workpiece *A prepared hole with the same diameter or centering hole with a larger diameter than the tool is needed for drilling with the long type.
DC < 6mm , stepped shank
DC ≥ 6mm , relief shank
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H-type with oil hole (3D/5D) for 2-5D deep hole applications ● Inch sizes now available ● Internal coolant supply enables deep flat hole drilling. *A prepared hole with the same diameter or centering hole with a larger diameter than the tool is needed for drilling with an L/D=5 oil hole.
Deep Spot Facing
Long Overhang Spot Facing
0.020
Tool: MDF 0600H3D Part Material: Carbon Steel Cutting Conditions: v c=295 SFM, f =0.004 IPR H = 0.709 (3D), Internal Coolant Supply Overhang 1.378"
Able to continue after 1,500 holes Tool: MDF 0600H5D
0.016
MDF Type
Part Material: Carbon Steel ø6mm Cutting Conditions: v c=459 SFM, f =0.006 IPR H = 1.181" (5D), Internal Coolant Supply 1.772" overhang, prepared hole depth 0.118" (ø6mm)
0.012
Entrance Hole
Bottom
0.008
Competitor's Product
Breaks after 1,247 holes
0.004
Hole Bottom
Entrance
0
MDF Type
Competitor's Product
0
1000
2000
Drilling on slanted surfaces
Prevents burrs and conical remnants on tool withdrawal
Tool: MDF 1000S2D Part Material: Low Carbon Steel Cutting Conditions: v c=246 SFM, f =0.0047 IPR H = 0.197", External MQL
Tool: MDF 0500S2D Part Material: Alloy Structural Steel Cutting Conditions:
v c=213 SFM, f =0.003 IPR H = 0.393", External MQL
■ Distinguishing flat drills, general-purpose drills and endmills
Flat Drill MDF Type
General-Purpose Drill
Endmill for Spot Facing
Tool
GSXMILL Slot
GS/HGS Type
Concave
(medium/low, 2 to 3°)
Convex (135°)
Convex (180°)
Shape of hole base
Almost at (concave)
Convex (cannot be used as prepared hole for drilling)
Concave
0 to 0.5°
2 to 3°
Only for low feed 1D or smaller ≤1/5 the feed of a general-purpose drill Only for low feed 1D or smaller ≤1/2 the feed of a at drill
Drilling in at surfaces
Approx. 1/2 the feed of a general-purpose drill
Best
Drilling non- at surfaces
Ideal (2D or smaller recommended)
Impossible
Traverse Cutting
Impossible
Impossible
Best
■ Product Range
Diameter Range (Inch / mm )
Coolant Supply
Cat. No.
Hole Depth (L/D)
ø .0118 to .7874" ø0.3 to 20.0 ø .1181 to .7874" ø3.0 to 20.0 ø .1181 to .6299" ø3.0 to 16.0 ø .1181 to .6299" ø3.0 to 16.0
MDF □□□□ S2D
up to 2D
External
MDF □□□□ L2D
up to 2D
MDF □□□□ H3D
up to 3D
Internal
MDF □□□□ H5D
up to 5D
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