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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

    Metric
    Inch
    SAP Material Number 6197130
    ISO Catalog Number TDF521A20000
    ANSI Catalog Number TDF521A20000
    Grade WN15HD
    [D1] Drill Diameter M 20.0000
    [D1] Drill Diameter M .7874
    [L] Overall Length 131.0000
    [L] Overall Length 5.157
    [L3] Flute Length 79.0000
    [L3] Flute Length 3.110
    [L4] Maximum Drilling Depth 55.0000
    [L4] Maximum Drilling Depth 2.165
    [LS] Shank Length 50.0
    [LS] Shank Length 1.968
    [D] Adapter / Shank / Bore Diameter 20.0
    [D] Adapter / Shank / Bore Diameter .7874
    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
    • Bohren: Konvexe EintrittsflächeBohren: Konvexe Eintrittsfläche
    • Chain DrillingChain Drilling
    • Drilling: Cross-Hole DrillingDrilling: Cross-Hole Drilling
    • Drilling: Corner Drilling 45°Drilling: Corner Drilling 45°
    • Bohrtiefe: 3xBohrtiefe: 3x
    • Corner Style: Corner ChamferCorner Style: Corner Chamfer
    • Schneideckenausführung: Ebene StirnflächeSchneideckenausführung: Ebene Stirnfläche
    • Zylinderschaft –  ohne Spannfläche  ≤h6Zylinderschaft – ohne Spannfläche ≤h6
    • Spiralwinkel: 30°Spiralwinkel: 30°
    • 3856338563
    • 3855038550
    • Through Coolant: Radial: DrillingThrough Coolant: Radial: Drilling
    • MQL (Minimum Quantity Lubricant): DrillingMQL (Minimum Quantity Lubricant): Drilling
    • Tool Dimensions: 2flute/4margin/coolantTool Dimensions: 2flute/4margin/coolant

    Workpiece Materials

    N

    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.

    Grades

    • WN15HD
      N
    • WU20PD
      P
      M
      K
      S
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