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DIN counterbore for tapping drill holes 8X3,3 mm

Article no.: 156220 8X3,3

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Counterbore ⌀ D1 ×pin ⌀ D2 (mm) Unit price incl. VAT
  • Tool material: HSS
  • Number of cutting edges Z: 3
  • Standard: DIN 373
  • Shank: Parallel shank to h9

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    Product details

    Technical Data

    Counterbore ⌀ 8 mm
    Coating uncoated
    Pin ⌀ 3.3 mm
    Tool material HSS
    Number of cutting edges Z 3
    Standard DIN 373
    Shank Parallel shank to h9
    for screw size M4
    Overall length L 71 mm
    Shank ⌀ Ds 5 mm
    Feed f in steel < 500 N/mm2 0.09 mm/rev.
    Through-coolant no
    Pre-drill ⌀ 3.3 mm
    Step height L1 1st step with chamfer 14 mm
    Point angle 180 degrees
    Type of product Counterbore

    Identification numbers & Classifications

    Article number 156220 8X3,3
    EAN / GTIN 4045197087911
    Manufacturer number 156220 8X3,3

    Application Table

    Aluminium (short chipping)
    N
    33
    Steel < 500 N/mm²
    P
    28
    Steel < 750 N/mm²
    P
    27
    Steel < 900 N/mm²
    P
    27
    wet maximum
     

    Description

    Version:

    Three edged, spiral fluted counterbore with fixed pilot for tapping drill holes.

    Application:

    For counterboring socket head screws DIN 912, 6912, 7984 and slotted cheese head screws ISO 1207 (DIN 84).
    The pilot diameter matches the tapping hole diameter.

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