Countersinks

Countersinks

Made in USA since 1992

Which material is right for your job?

Carbide
Carbide Holds its edge in steel and stainless 1, 3 and 6 flute; 60° to 100° Best for Production countersinking, harder material
Cobalt
Cobalt
HSS
HSS Economical, widely used Single and 4 flute; 60°, 82°, 90° Best for General shop work, softer materials

We stock Carbide and HSS countersinks in Single Flute, Three Flute, Four Flute and Six Flute configurations. Chatter in countersinking comes from cutting edges entering and leaving the cut — the tool deflects as an edge engages and springs back as it exits. The two ways around it pull in opposite directions: a single flute cuts with one continuous edge so there is no load-and-release cycle, and it fits holes too small for a multi-flute tool; a six-flute design keeps at least two edges engaged at once and spreads the cutting force evenly around the tool, which is why six-flute countersinks are sold for chatter-free work. Either way, feed positively and let the tool cut rather than rub.

Carbide holds its edge longer in steel and stainless, while HSS remains an economical choice for general shop use. All countersinks are manufactured in the USA and typically ship the same day.

  • Compare SKU Vendor Size (D1) Shank Diameter (D2) Overall Length (L1) Included Angle (A) Number of Flutes Coating In Stock Price Quantity
    A78494 ACT 1/2 1/2 3.0000 (3) 120° 6 Uncoated 53
    $248.91
  • A47066 ACT 1 1/2 3 82° 3 Uncoated 56
    $194.77
  • A47042 ACT 1 1/2 3 82° 1 Uncoated 35
    $194.77
  • A78652 ACT 5/8 5/8 3.5000 (3-1/2) 60° 1 Uncoated 19
    $44.53
  • A78641 ACT 5/8 5/8 3.5000 (3-1/2) 60° 1 Uncoated 20
    $353.50
  • A78618 ACT 5/8 5/8 3.5000 (3-1/2) 60° 4 Uncoated 20
    $30.51
  • A78589 ACT 5/8 5/8 3.5000 (3-1/2) 60° 4 Uncoated 18
    $353.50
  • A78531 ACT 5/8 5/8 3.5000 (3-1/2) 60° 6 Uncoated 20
    $353.50
  • A47104 ACT 3/8 1/4 2-1/2 90° 6 Uncoated 100
    $44.69
  • A47074 ACT 1 1/2 3 90° 3 Uncoated 45
    $194.77
  • A47050 ACT 1 1/2 3 90° 1 Uncoated 11
    $194.77
  • A79324 ACT 3/8 1/4 2-5/8 90° 6 ALTiN 100
    $52.16
  • A78660 ACT 5/8 5/8 3.5000 (3-1/2) 82° 1 Uncoated 16
    $44.53
  • A78626 ACT 5/8 5/8 3.5000 (3-1/2) 82° 4 Uncoated 20
    $30.51
  • A78557 ACT 5/8 5/8 3.5000 (3-1/2) 82° 1 Uncoated 19
    $353.50
  • A78499 ACT 5/8 5/8 3.5000 (3-1/2) 82° 4 Uncoated 17
    $353.50
  • A78471 ACT 5/8 5/8 3.5000 (3-1/2) 82° 6 Uncoated 19
    $353.50
  • A56081 ACT 1 1/2 3 100° 3 Uncoated 10
    $194.77
  • A56073 ACT 1 1/2 3 100° 1 Uncoated 36
    $194.77
  • A78668 ACT 5/8 5/8 3.5000 (3-1/2) 90° 1 Uncoated 15
    $44.53
  • A78634 ACT 5/8 5/8 3.5000 (3-1/2) 90° 4 Uncoated 42
    $30.51
  • A78565 ACT 5/8 5/8 3.5000 (3-1/2) 90° 1 Uncoated 20
    $353.50
  • A78507 ACT 5/8 5/8 3.5000 (3-1/2) 90° 4 Uncoated 20
    $353.50
  • A78479 ACT 5/8 5/8 3.5000 (3-1/2) 90° 6 Uncoated 19
    $353.50
  • A47105 ACT 1/2 1/4 2-1/2 90° 6 Uncoated 47
    $55.13
  • A79325 ACT 1/2 1/4 2-5/8 90° 6 ALTiN 100
    $62.59
  • A78602 ACT 5/8 5/8 3.5000 (3-1/2) 100° 1 Uncoated 11
    $44.53
  • A78573 ACT 5/8 5/8 3.5000 (3-1/2) 100° 1 Uncoated 18
    $353.50
  • A78544 ACT 5/8 5/8 3.5000 (3-1/2) 100° 4 Uncoated 15
    $30.51
  • A78515 ACT 5/8 5/8 3.5000 (3-1/2) 100° 4 Uncoated 20
    $353.50
  • A78487 ACT 5/8 5/8 3.5000 (3-1/2) 100° 6 Uncoated 16
    $353.50
  • A78610 ACT 5/8 5/8 3.5000 (3-1/2) 120° 1 Uncoated 20
    $44.53
  • A78581 ACT 5/8 5/8 3.5000 (3-1/2) 120° 1 Uncoated 19
    $353.50
  • A78552 ACT 5/8 5/8 3.5000 (3-1/2) 120° 4 Uncoated 20
    $30.51
  • A78523 ACT 5/8 5/8 3.5000 (3-1/2) 120° 4 Uncoated 19
    $353.50
  • A78495 ACT 5/8 5/8 3.5000 (3-1/2) 120° 6 Uncoated 23
    $353.50
  • A47106 ACT 5/8 1/2 2-5/8 90° 6 Uncoated 55
    $80.81
  • A79326 ACT 5/8 3/8 2-3/4 90° 6 ALTiN 100
    $91.37
  • A78653 ACT 3/4 3/4 4.0000 (4) 60° 1 Uncoated 15
    $63.57
  • A78642 ACT 3/4 3/4 4.0000 (4) 60° 1 Uncoated 20
    $504.54
  • A78619 ACT 3/4 3/4 4.0000 (4) 60° 4 Uncoated 23
    $41.15
  • A78590 ACT 3/4 3/4 4.0000 (4) 60° 4 Uncoated 18
    $504.54
  • A78532 ACT 3/4 3/4 4.0000 (4) 60° 6 Uncoated 18
    $504.54
  • A78661 ACT 3/4 3/4 4.0000 (4) 82° 1 Uncoated 21
    $63.57
  • A78627 ACT 3/4 3/4 4.0000 (4) 82° 4 Uncoated 24
    $41.15
  • A78558 ACT 3/4 3/4 4.0000 (4) 82° 1 Uncoated 17
    $504.54
  • A78500 ACT 3/4 3/4 4.0000 (4) 82° 4 Uncoated 16
    $504.54
  • A78472 ACT 3/4 3/4 4.0000 (4) 82° 6 Uncoated 18
    $504.54
  • A47107 ACT 3/4 1/2 2-3/4 90° 6 Uncoated 79
    $114.54
  • A79327 ACT 3/4 3/8 2-3/4 90° 6 ALTiN 100
    $125.09
  • A78595 ACT 3/4 3/4 4.0000 (4) 90° 1 Uncoated 18
    $63.57
  • A78566 ACT 3/4 3/4 4.0000 (4) 90° 1 Uncoated 20
    $504.54
  • A78537 ACT 3/4 3/4 4.0000 (4) 90° 4 Uncoated 13
    $41.15
  • A78508 ACT 3/4 3/4 4.0000 (4) 90° 4 Uncoated 17
    $504.54
  • A78480 ACT 3/4 3/4 4.0000 (4) 90° 6 Uncoated 19
    $504.54
  • A78603 ACT 3/4 3/4 4.0000 (4) 100° 1 Uncoated 17
    $63.57
  • A78574 ACT 3/4 3/4 4.0000 (4) 100° 1 Uncoated 17
    $504.54
  • A78545 ACT 3/4 3/4 4.0000 (4) 100° 4 Uncoated 15
    $41.15
  • A78516 ACT 3/4 3/4 4.0000 (4) 100° 4 Uncoated 18
    $504.54
  • A78488 ACT 3/4 3/4 4.0000 (4) 100° 6 Uncoated 20
    $504.54
  • A47108 ACT 1 1/2 3 90° 6 Uncoated 24
    $194.77
  • A79328 ACT 1 1/2 3 90° 6 ALTiN 100
    $211.39
  • A78611 ACT 3/4 3/4 4.0000 (4) 120° 1 Uncoated 20
    $63.57
  • A78582 ACT 3/4 3/4 4.0000 (4) 120° 1 Uncoated 19
    $504.54
  • A78553 ACT 3/4 3/4 4.0000 (4) 120° 4 Uncoated 18
    $41.15
  • A78524 ACT 3/4 3/4 4.0000 (4) 120° 4 Uncoated 17
    $504.54
  • A78496 ACT 3/4 3/4 4.0000 (4) 120° 6 Uncoated 15
    $504.54
  • A56082 ACT 1/8 1/8 1-1/2 100° 6 Uncoated 11
    $14.51
  • A56083 ACT 3/16 3/16 2 100° 6 Uncoated 19
    $21.64
  • A56084 ACT 1/4 1/4 2 100° 6 Uncoated 83
    $24.70
  • A56085 ACT 3/8 1/4 2-5/8 100° 6 Uncoated 41
    $44.69
  • A56086 ACT 1/2 1/4 2-5/8 100° 6 Uncoated 24
    $55.13
  • A56087 ACT 5/8 3/8 2-3/4 100° 6 Uncoated 39
    $80.81
  • A56088 ACT 3/4 3/8 2-3/4 100° 6 Uncoated 18
    $114.54
  • A56089 ACT 1 1/2 3 100° 6 Uncoated 44
    $194.77
  • Total: items /

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