Flat Bottom Drills MDF Type
Long shanked type (L2D) 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
J
H Type with oil hole (3D/5D) for 2-5D deep hole applications ● 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.
Long Overhang Spot Facing
Deep 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"
0.016
Tool: MDF 0600H5D 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" (ø6)
Able to continue after 1,500 holes
MDF Type
0.012
Entrance Hole
Bottom
0.008
Competitor's Product
0.004
Breaks after 1,247 holes
Hole Bottom
Entrance
0
MDF Type
Competitor's Product
0
1000
2000
Prevents burrs and conical remnants on tool withdrawal
Drilling on slanted surfaces
Tool: MDF 0500S2D Part Material: Alloy Structural Steel Cutting Conditions:
Tool: MDF 1000S2D Part Material: Low Carbon Steel Cutting Conditions:
v c =213 SFM, f =0.003 IPR H = 0.393", External MQL
v c =246 SFM, f =0.0047 IPR H = 0.197", 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 (180°)
Convex (135°)
Shape of hole base
Almost flat (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
Drilling in flat surfaces
Approx. 1/2 the feed of a general-purpose drill
Best
Only for low feed 1D or smaller ≤1/2 the feed of a flat drill
Drilling non-flat surfaces
Ideal (2D or smaller recommended)
Impossible
Traverse Cutting
Impossible
Impossible
Best
■ Product Range
Coolant Supply
Cat. No.
Diameter Range (mm) Hole Depth (L/D) Number of items
MDF □□□□ S2D
188 items in stock
ø0.3 to 20.0
up to 2
External
MDF □□□□ L2D
ø3.0 to 20.0
up to 2
115 items in stock
MDF □□□□ H3D
99 items in stock
ø3.0 to 16.0
up to 3
Internal
MDF □□□□ H5D
ø3.0 to 16.0
up to 5
99 items in stock
J45
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