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
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
    A78467 ACT 1/2 1/2 2.8750 (2-7/8) 60° 0 Uncoated 15
    $113.22
  • A78457 ACT 1/2 1/2 2.8750 (2-7/8) 82° 0 Uncoated 10
    $113.22
  • A78462 ACT 1/2 1/2 2.8750 (2-7/8) 90° 0 Uncoated 13
    $113.22
  • A78638 ACT 5/16 5/16 2.5000 (2-1/2) 60° 1 Uncoated 65
    $129.13
  • A78586 ACT 5/16 5/16 2.5000 (2-1/2) 60° 4 Uncoated 60
    $129.13
  • A78528 ACT 5/16 5/16 2.5000 (2-1/2) 60° 6 Uncoated 51
    $129.13
  • A78594 ACT 5/16 5/16 2.5000 (2-1/2) 82° 4 Uncoated 65
    $129.13
  • A78554 ACT 5/16 5/16 2.5000 (2-1/2) 82° 1 Uncoated 60
    $129.13
  • A78536 ACT 5/16 5/16 2.5000 (2-1/2) 82° 6 Uncoated 60
    $129.13
  • A78562 ACT 5/16 5/16 2.5000 (2-1/2) 90° 1 Uncoated 59
    $129.13
  • A78504 ACT 5/16 5/16 2.5000 (2-1/2) 90° 4 Uncoated 65
    $129.13
  • A78476 ACT 5/16 5/16 2.5000 (2-1/2) 90° 6 Uncoated 46
    $129.13
  • A78570 ACT 5/16 5/16 2.5000 (2-1/2) 100° 1 Uncoated 63
    $129.13
  • A78512 ACT 5/16 5/16 2.5000 (2-1/2) 100° 4 Uncoated 60
    $129.13
  • A78484 ACT 5/16 5/16 2.5000 (2-1/2) 100° 6 Uncoated 59
    $129.13
  • A78578 ACT 5/16 5/16 2.5000 (2-1/2) 120° 1 Uncoated 61
    $129.13
  • A78520 ACT 5/16 5/16 2.5000 (2-1/2) 120° 4 Uncoated 65
    $129.13
  • A78492 ACT 5/16 5/16 2.5000 (2-1/2) 120° 6 Uncoated 39
    $129.13
  • A78639 ACT 3/8 3/8 2.5000 (2-1/2) 60° 1 Uncoated 64
    $152.92
  • A78587 ACT 3/8 3/8 2.5000 (2-1/2) 60° 4 Uncoated 61
    $152.92
  • A78529 ACT 3/8 3/8 2.5000 (2-1/2) 60° 6 Uncoated 44
    $152.92
  • A78555 ACT 3/8 3/8 2.5000 (2-1/2) 82° 1 Uncoated 55
    $152.92
  • A78497 ACT 3/8 3/8 2.5000 (2-1/2) 82° 4 Uncoated 60
    $152.92
  • A78469 ACT 3/8 3/8 2.5000 (2-1/2) 82° 6 Uncoated 52
    $152.92
  • A78563 ACT 3/8 3/8 2.5000 (2-1/2) 90° 1 Uncoated 53
    $152.92
  • A78505 ACT 3/8 3/8 2.5000 (2-1/2) 90° 4 Uncoated 58
    $152.92
  • A78477 ACT 3/8 3/8 2.5000 (2-1/2) 90° 6 Uncoated 32
    $152.92
  • A78571 ACT 3/8 3/8 2.5000 (2-1/2) 100° 1 Uncoated 63
    $152.92
  • A78513 ACT 3/8 3/8 2.5000 (2-1/2) 100° 4 Uncoated 50
    $152.92
  • A78485 ACT 3/8 3/8 2.5000 (2-1/2) 100° 6 Uncoated 48
    $152.92
  • A78579 ACT 3/8 3/8 2.5000 (2-1/2) 120° 1 Uncoated 51
    $152.92
  • A78521 ACT 3/8 3/8 2.5000 (2-1/2) 120° 4 Uncoated 57
    $152.92
  • A78493 ACT 3/8 3/8 2.5000 (2-1/2) 120° 6 Uncoated 49
    $152.92
  • A47091 ACT 3/4 1/2 2-3/4 60° 6 Uncoated 39
    $114.54
  • A47057 ACT 3/4 1/2 2-3/4 60° 3 Uncoated 50
    $114.54
  • A47033 ACT 3/4 1/2 2-3/4 60° 1 Uncoated 28
    $114.54
  • A47099 ACT 3/4 1/2 2-3/4 82° 6 Uncoated 25
    $114.54
  • A47065 ACT 3/4 1/2 2-3/4 82° 3 Uncoated 38
    $114.54
  • A47041 ACT 3/4 1/2 2-3/4 82° 1 Uncoated 17
    $114.54
  • A47107 ACT 3/4 1/2 2-3/4 90° 6 Uncoated 18
    $114.54
  • A47073 ACT 3/4 1/2 2-3/4 90° 3 Uncoated 13
    $114.54
  • A47049 ACT 3/4 1/2 2-3/4 90° 1 Uncoated 50
    $114.54
  • A56088 ACT 3/4 3/8 2-3/4 100° 6 Uncoated 24
    $114.54
  • A56080 ACT 3/4 3/8 2-3/4 100° 3 Uncoated 23
    $114.54
  • A56072 ACT 3/4 3/8 2-3/4 100° 1 Uncoated 64
    $114.54
  • A47092 ACT 1 1/2 3 60° 6 Uncoated 32
    $194.77
  • A47058 ACT 1 1/2 3 60° 3 Uncoated 54
    $194.77
  • A47034 ACT 1 1/2 3 60° 1 Uncoated 56
    $194.77
  • A47100 ACT 1 1/2 3 82° 6 Uncoated 32
    $194.77
  • A47066 ACT 1 1/2 3 82° 3 Uncoated 61
    $194.77
  • A47042 ACT 1 1/2 3 82° 1 Uncoated 36
    $194.77
  • A47108 ACT 1 1/2 3 90° 6 Uncoated 32
    $194.77
  • A47074 ACT 1 1/2 3 90° 3 Uncoated 47
    $194.77
  • A47050 ACT 1 1/2 3 90° 1 Uncoated 12
    $194.77
  • A56089 ACT 1 1/2 3 100° 6 Uncoated 47
    $194.77
  • A56081 ACT 1 1/2 3 100° 3 Uncoated 10
    $194.77
  • A56073 ACT 1 1/2 3 100° 1 Uncoated 36
    $194.77
  • Total: items /

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