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    TOP DRILL FLAT with Through Coolant
    TOP DRILL FLAT with Through Coolant
    TOP DRILL FLAT with Through Coolant
    TOP DRILL FLAT with Through Coolant

    TDF511A/WU20PD • TDF521A/WN15HD • A-Shank • 3 x D

    TOP DRILL FLAT with Through Coolant

    SAP Material Number 6197090
    ISO Catalog Number TDF511A18000
    ANSI Catalog Number TDF511A18000
    Grade WU20PD
    [D1] Drill Diameter M 18.0000
    [D1] Drill Diameter M .7087
    [L] Overall Length 123.0000
    [L] Overall Length 4.842
    [L3] Flute Length 73.0000
    [L3] Flute Length 2.874
    [L4] Maximum Drilling Depth 51.0000
    [L4] Maximum Drilling Depth 2.007
    [LS] Shank Length 48.0
    [LS] Shank Length 1.889
    [D] Adapter / Shank / Bore Diameter 18.0
    [D] Adapter / Shank / Bore Diameter .7087
    See all Product Variants

    Uses and application

    • DrillingDrilling
    • Drilling: Inclined EntryDrilling: Inclined Entry
    • Drilling: Inclined ExitDrilling: Inclined Exit
    • Drilling: X-OffsetDrilling: X-Offset
    • Drilling: Flat BottomDrilling: Flat Bottom
    • Drilling: Stacked PlatesDrilling: Stacked Plates
    • Drilling: ConvexDrilling: Convex
    • Chain DrillingChain Drilling
    • Drilling: Cross-Hole DrillingDrilling: Cross-Hole Drilling
    • Drilling: Corner Drilling 45°Drilling: Corner Drilling 45°
    • Drilling Depth: 3xDrilling Depth: 3x
    • Corner Style: Corner ChamferCorner Style: Corner Chamfer
    • Corner Style: Square EndCorner Style: Square End
    • Shank - Cylindrical  Plain ≤h6Shank - Cylindrical Plain ≤h6
    • Helix Angle: 30°Helix Angle: 30°
    • 3856338563
    • 3855038550
    • Drilling - Through CoolantDrilling - Through Coolant
    • Through Coolant: MQL (Minimum Quantity Lubricant): DrillingThrough Coolant: MQL (Minimum Quantity Lubricant): Drilling
    • Tool Dimensions: 2flute/4margin/coolantTool Dimensions: 2flute/4margin/coolant

    Workpiece Materials


    Features and benefits

    • Flat bottom drill with through coolant.

    • Application specific SC Drills design to reduce the number of operations when: 1) a flat bottom hole is needed, eliminating the needs of an additional SC End Mill; 2) is necessary the preparation on an inclined or curved surface.

    • Four-margin land design to improve hole straightness and roundness. Increased stability even in crossing holes operations.

    • Creates full flat bottom holes.

    • Two grades to cover the majority of the workpiece materials.


    • WN15HD
    • WU20PD

      Composition: With a multilayered PVD TiN-TiAlN coating, a high-quality submicron carbide substrate and a state-of-the-art surface condition, this grade gives the highest level of wear resistance at high cutting speeds.
      Application: First choice for alloyed and high-alloyed steels and cast irons. A state-of-the-art surface condition enables superior chip evacuation even when MQL is applied.

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