Hole Oversize (mm) Coated Carbide Drills for Spot Facing Flat MultiDrill New 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. A Two types A ØDc < 6mm Stepped Shank Products B B ØDc ≥ 6mm Relief Shank Products 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 Long Overhang Spot Facing 1 2 Tool: MDF0600H5D 0,5 Tool: MDF0600H3D MDF 1500 holes Able to Work Material: C50, Ø6mmContinueCutting Conditions:vc=140m/min, 0,4 Work Material: C50,Cutting Conditions:vc=90m/min, f =0,15mm/rev 0,3 f =0,1mm/rev Competit. H=30mm (5D)Internal Coolant 0,2 H=18mm (3D)Internal Coolant Product 1247holes Breakage Overhang 45mm 0,1 Overhang 35mm Prepared Hole 3mm 1 2 0 500 1000 1500 (0,5D) 0 MDF Competitor`s Product 1 Entrance 2 Hole Bottom Inclined Surface Drilling Controlling Burrs and Chips when Withdrawn Tool: MDF0500S2D Tool: MDF1000S2D Work Material: 15CrMo5 Work Material: St 42-3 Cutting Conditions: vc=65m/min, Cutting Conditions: vc=75m/min, f =0,08mm/rev f =0,12mm/rev H=10mm H=5mm External MQL External MQL Using Flat Drills, General-Purpose Drills and Endmills Tool Flat Drill General Purpose Drill Endmill for Spot FacingMDF TypeGS/HGS TypeGSX MILL Slot Convex Shape (180°) Convex Shape (135°) Concave Shape Hole Bottom Shape (2° - 3° concavitiy) Nearly Flat Concave Shape Convex Shape 0-0,5° (Concave Shape) 2 - 3° (Cannot be used forprepared hole drilling.) Drilling in horizontalsurfaces Feed rate approximately half of ageneral-purpose drill Optimal x Within 1D, limited to low feed rateFeed rate one-fifth or lower of a general-purpose drill Drilling in non-horizontalsurfaces Optimal (within 2D is recommended) x Unusable Within 1D, limited to low feed rateFeed rate half or lower of a flat drill Traversing x Unusable x Unusable Optimal Series Application Series Diameter Range (mm) Hole Depth (L/D) MDF S2D Ø0,3 - Ø20,0 ≤ 2,0 External MDF L2D Ø0,3 - Ø20,0 ≤ 2,0 MDF H3D Ø0,3 - Ø16,0 ≤ 3,0 Internal MDF H5D Ø0,3 - Ø16,0 ≤ 5,0 K29 Multi-Drills