Flat MultiDrill
Coated Carbide Drills for Spot Facing
MDF Type
Long Type (L2D)
For flat base drilling in long overhang conditions, hole expansion, burr prevention. For deep flat base drilling and to avoid interference with workpiece. Drilling that uses the long shank type requires a guide hole of the same diameter or a centering hole larger than the tool diameter. Two types
A
ØDC < 6 mm
Stepped Shank Products
B
ØDC ≥ 6 mm
Relief Shank Products
A
B
With Oil Hole (H3D Type / H5D Type) Support for internal coolant allows for deeper flat hole drilling. Drilling that uses oil hole L/D = 5 requires a guide hole of the same diameter or a centering hole larger than the tool diameter.
Deep Spot Facing Able to Continue
1500 holes
Competit. Product 1247holes 0
500
Breakage
1000
1500
1
0,5
Tool: MDF0600H5D Work Material: C50, Ø 6 mm Cutting Conditions: vc = 140 m/min, f = 0,15 mm/rev H = 30 mm (5D) Internal Coolant Overhang 45 mm Prepared Hole 3 mm (0,5D)
Hole Oversize (mm)
MDF
Long Overhang Spot Facing Tool: MDF0600H3D Work Material: C50, Cutting Conditions: vc = 90 m/min, f = 0,1 mm/rev H = 18mm (3D) Internal Coolant Overhang 35 mm
0,4 0,3 0,2 0,1
1
0
Inclined Surface Drilling
2
2
MDF
1 Entrance
Competitor`s Product
2 Hole Bottom
Controlling Burrs and Chips when Withdrawn Tool: MDF0500S2D Work Material: 15CrMo5 Cutting Conditions: vc = 65 m/min, f = 0,08 mm/rev H = 10mm External MQL
Tool: MDF1000S2D Work Material: St 42-3 Cutting Conditions: vc = 75 m/min, f = 0,12 mm/rev H = 5mm External MQL
Using Flat Drills, General-Purpose Drills and Endmills Flat Drill MDF Type
Tool
General Purpose Drill GS/HGS Type
Endmill for Spot Facing GSX MILL Slot
Concave Shape (2° - 3° concavitiy)
Nearly Flat
Concave Shape
(Concave Shape)
0-0,5°
Convex Shape 2 - 3°
Drilling in horizontal surfaces Drilling in non-horizontal surfaces
Feed rate approximately half of a general-purpose drill
Optimal
x
Optimal (within 2D is recommended)
x
Unusable
Traversing
x
Unusable
x
Unusable
Multi-Drills
Convex Shape (135°)
Convex Shape (180°)
Hole Bottom Shape
(Cannot be used for prepared hole drilling.)
Within 1D, limited to low feed rate Feed rate one-fifth or lower of a general-purpose drill
Within 1D, limited to low feed rate Feed rate half or lower of a flat drill
Optimal
Series Application External Internal
Series
Diameter Range (mm)
MDF S2D
Ø 0,3 – 20,0
≤ 2,0
MDF L2D
Ø 0,3 – 20,0
≤ 2,0
MDF H3D
Ø 0,3 – 16,0
≤ 3,0
MDF H5D
Ø 0,3 – 16,0
≤ 5,0
Hole Depth (L/D)
K25