180° Flat-Bottom Drills • Through Coolant
    180° Flat-Bottom Drills • Through Coolant
    180° Flat-Bottom Drills • Through Coolant
    180° Flat-Bottom Drills • Through Coolant

    B707_FBG (~3 x D) • KC7315 • A-Shank • Flat Bottom Drills

    180° Flat-Bottom Drills • Through Coolant

    SAP Material Number 3505133
    ISO Catalog Number B707A03970FBG
    ANSI Catalog Number B707A03970FBG
    Grade KC7315
    [D1] Drill Diameter M 3.9700
    [D1] Drill Diameter M .1563
    [L] Overall Length 66.0000
    [L] Overall Length 2.598
    [L3] Flute Length 24.0000
    [L3] Flute Length .9449
    [L4] Maximum Drilling Depth 17.0000
    [L4] Maximum Drilling Depth .6693
    [LS] Shank Length 36.0
    [LS] Shank Length 1.417
    [D] Adapter / Shank / Bore Diameter 6.0
    [D] Adapter / Shank / Bore Diameter .2362
    See all Product Variants

    Uses and application

    • DrillingDrilling
    • Drilling: Inclined EntryDrilling: Inclined Entry
    • Drilling: Inclined ExitDrilling: Inclined Exit
    • Drilling: X-OffsetDrilling: X-Offset
    • Drilling: ConvexDrilling: Convex
    • 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°
    • DIN number 6537DIN number 6537
    • DIN number 6535DIN number 6535
    • 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
    • Chain DrillingChain Drilling

    Workpiece Materials

    P Steel
    K Cast Iron

    Features and benefits

    • Flat bottom drills with through coolant.

    • Application-specific SC drills that combine two operations in one:
      1) Eliminate the 180° end mill in flat-bottom drilling or when preparing an inclined or curved surface for drilling.
      2) After full cylindrical engagement, the drill runs at normal solid carbide drilling parameters.

    • Unique FB drill-point design with two effective cutting edges over center enable high feed rates.

    • Creates a true flat-bottom hole from O.D. to center.

    • Four-margin land design improves hole straightness and roundness and provides good alignment, even when drilling cross holes.

    • Three grades-geometry-combinations available to cover most common materials.

    Machine Side


    Workpiece Side



    • KC7315

      • Multilayer TiAlN-PVD-coated universal fine-grain grade.
      • Highest level of wear resistance for higher cutting speeds.
      • More efficient than TiN-PVD grades.
      • First choice for alloyed and high-alloy steel and cast iron.

      P Steel
      K Cast Iron

    Dimensions for Kennametal Solid Carbide Drills

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