Spiral Flute - Semi Bottoming

Spiral Flute - Semi Bottoming

Atlas High Speed Steel (HSS) Spiral Flute - Semi Bottoming

General Purpose - Spiral Flute - Semi Bottoming - High Speed Steel

  • Optimized for relatively deep hole tapping in copper, brass, aluminum, and other soft ductile materials
  • ZrN coating offers increased speed rates and prolonged tool life
  • 52° Helix
  • Slightly longer chamfer distributes cutting over greater number of teeth for increased production
  • Can be used for plug or bottoming applications
  • Made in the USA

Speeds and Feed Info

Have a question or need help?

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  • Size OAL H Limit # of Flutes Coating In Stock Sku Price Quantity
    3-48 1-13/16 H2 2 Uncoated 26
    A55807
    $19.52
  • 3-56 1-13/16 H2 2 Uncoated 40
    A55808
    $19.52
  • 4-40 1-7/8 H2 2 Uncoated 83
    A55809
    $16.12
  • 4-48 1-7/8 H2 2 Uncoated 63
    A55810
    $16.12
  • 5-40 1-15/16 H3 2 Uncoated 23
    A55811
    $16.12
  • 5-44 1-15/16 H3 2 Uncoated 17
    A55812
    $16.08
  • 6-32 2 H3 2 Uncoated 100
    A55813
    $13.04
  • 6-40 2 H3 2 Uncoated 100
    A55814
    $13.04
  • 8-32 2-1/8 H3 3 Uncoated 100
    A55815
    $13.04
  • 8-36 2-1/8 H3 3 Uncoated 36
    A55816
    $13.04
  • 10-24 2-3/8 H3 3 Uncoated 31
    A55817
    $13.04
  • 10-32 2-3/8 H3 3 Uncoated 78
    A55818
    $13.04
  • 12-24 2-3/8 H3 3 Uncoated 100
    A55819
    $14.12
  • 12-28 2-3/8 H3 3 Uncoated 40
    A55820
    $14.12
  • 1/4-20 2-1/2 H3 3 Uncoated 100
    A55821
    $14.12
  • 1/4-28 2-1/2 H3 3 Uncoated 37
    A55822
    $14.12
  • 5/16-18 2-23/32 H3 3 Uncoated 100
    A55823
    $17.53
  • 5/16-24 2-23/32 H3 3 Uncoated 61
    A55824
    $17.53
  • 3/8-16 2-15/16 H3 3 Uncoated 100
    A55825
    $20.23
  • 3/8-24 2-15/16 H3 3 Uncoated 20
    A55826
    $20.23
  • 7/16-14 3-5/32 H3 3 Uncoated 21
    A55827
    $30.28
  • 7/16-20 3-5/32 H3 3 Uncoated 26
    A55828
    $30.28
  • 1/2-13 3-3/8 H3 3 Uncoated 67
    A55829
    $36.26
  • 1/2-20 3-3/8 H3 3 Uncoated 31
    A55830
    $36.26
  • 9/16-12 3-19/32 H3 4 Uncoated 16
    A55831
    $60.48
  • 9/16-18 3-19/32 H3 4 Uncoated 44
    A55832
    $60.48
  • 5/8-11 3-13/16 H3 4 Uncoated 46
    A55833
    $79.34
  • 5/8-18 3-13/16 H3 4 Uncoated Call
    A55834
    $79.34
  • 3/4-10 4-1/4 H3 4 Uncoated 28
    A55835
    $101.57
  • 3/4-16 4-1/4 H3 4 Uncoated 26
    A55836
    $101.57
  • Total: items /

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