Flat Bottom Drills MDF Series
■ General Features The flat MDF multidrill is a solid carbide drill that can be used for a variety of applications, including high-efficiency spot facing and drilling in inclined and curved surfaces.
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■ Features and Applications ● NEW Inch sizes added for MDF □□□□ H3D (see pages J54-J57) ● Suited to various types of drilling thanks to a point angle of 180° Can be used for high-efficiency spot facing, drilling in non-horizontal surfaces such as inclined and cylindrical surfaces, and interrupted drilling. Also reduces burrs at the hole exit. ● Improves machining stability Achieves high rigidity by employing RS THINNING, which provides a thick web at the bottom. ● Excellent chip evacuation Achieves excellent chip evacuation due to the wide chip pocket and high-quality rake face shape. ● Excellent cutting edge strength Achieves excellent cutting edge strength through optimized cutting edge design. ● Long types available Overhang lengths up to L/D=10 are now available. ● Types with oil hole available Coolant can now be supplied internally. This enables deeper drilling.
Improves drilling stability by ensuring web thickness Improves drilling stability by providing web thickness
■ Reduction of Burrs at Hole Exit
Conventional general-purpose drill
Part Material: Alloy Steel Tool: MDF 0500S2D (ø5.0mm 2D) Cutting Conditions: v c =213 SFM, f =0.0047", H =0.393", 150 holes, Wet Machine: Vertical machining center (BT40)
MDF Type
Reduces exit burrs by half compared with general-purpose drills
Height of burr: 0.007”
Height of burr: 0.017” Conventional general-purpose drill
Flat MultiDrill MDF Type
Burrs at Hole Exit
■ Machining Applications
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High-efciency spot facing
Hole expansion drilling
Drilling in non-horizontal surface (inclined surface, cylindrical surface, etc.)
Interrupted drilling
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Conventional general-purpose drill
MDF Type
Long Type *Prepared hole with same diameter recommended
Long Type *Prepared hole with same diameter recommended
Cross drilling
Pre-tap hole drilling in thin sheets
Spot facing in deep positions
Avoids interference with work material
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