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
    A46550 ACT 3/4 1/2 4-1/8 60° 4 Uncoated 17
    $82.34
  • A46555 ACT 3/4 1/2 4-1/8 82° 4 Uncoated 22
    $82.34
  • A46551 ACT 7/8 1/2 4-1/4 60° 4 Uncoated 18
    $96.73
  • A46556 ACT 7/8 1/2 4-1/4 82° 4 Uncoated 79
    $96.73
  • A46552 ACT 1 1/2 4-3/8 60° 4 Uncoated 50
    $100.48
  • A46557 ACT 1 1/2 4-3/8 82° 4 Uncoated 16
    $100.48
  • A78467 ACT 1/2 1/2 2.8750 (2-7/8) 60° 0 Uncoated Available to Order*
    $104.19
  • A78457 ACT 1/2 1/2 2.8750 (2-7/8) 82° 0 Uncoated Available to Order*
    $104.19
  • A78462 ACT 1/2 1/2 2.8750 (2-7/8) 90° 0 Uncoated Available to Order*
    $104.19
  • A78638 ACT 5/16 5/16 2.5000 (2-1/2) 60° 1 Uncoated Available to Order*
    $99.36
  • A78586 ACT 5/16 5/16 2.5000 (2-1/2) 60° 4 Uncoated Available to Order*
    $99.36
  • A78528 ACT 5/16 5/16 2.5000 (2-1/2) 60° 6 Uncoated Available to Order*
    $99.36
  • A78594 ACT 5/16 5/16 2.5000 (2-1/2) 82° 4 Uncoated Available to Order*
    $99.36
  • A78554 ACT 5/16 5/16 2.5000 (2-1/2) 82° 1 Uncoated Available to Order*
    $99.36
  • A78536 ACT 5/16 5/16 2.5000 (2-1/2) 82° 6 Uncoated Available to Order*
    $99.36
  • A78562 ACT 5/16 5/16 2.5000 (2-1/2) 90° 1 Uncoated Available to Order*
    $99.36
  • A78504 ACT 5/16 5/16 2.5000 (2-1/2) 90° 4 Uncoated Available to Order*
    $99.36
  • A78476 ACT 5/16 5/16 2.5000 (2-1/2) 90° 6 Uncoated Available to Order*
    $99.36
  • A78570 ACT 5/16 5/16 2.5000 (2-1/2) 100° 1 Uncoated Available to Order*
    $99.36
  • A78512 ACT 5/16 5/16 2.5000 (2-1/2) 100° 4 Uncoated Available to Order*
    $99.36
  • A78484 ACT 5/16 5/16 2.5000 (2-1/2) 100° 6 Uncoated Available to Order*
    $99.36
  • A78578 ACT 5/16 5/16 2.5000 (2-1/2) 120° 1 Uncoated Available to Order*
    $99.36
  • A78520 ACT 5/16 5/16 2.5000 (2-1/2) 120° 4 Uncoated Available to Order*
    $99.36
  • A78492 ACT 5/16 5/16 2.5000 (2-1/2) 120° 6 Uncoated Available to Order*
    $99.36
  • A78639 ACT 3/8 3/8 2.5000 (2-1/2) 60° 1 Uncoated Available to Order*
    $117.67
  • A78587 ACT 3/8 3/8 2.5000 (2-1/2) 60° 4 Uncoated Available to Order*
    $117.67
  • A78529 ACT 3/8 3/8 2.5000 (2-1/2) 60° 6 Uncoated Available to Order*
    $117.67
  • A78555 ACT 3/8 3/8 2.5000 (2-1/2) 82° 1 Uncoated Available to Order*
    $117.67
  • A78497 ACT 3/8 3/8 2.5000 (2-1/2) 82° 4 Uncoated Available to Order*
    $117.67
  • A78469 ACT 3/8 3/8 2.5000 (2-1/2) 82° 6 Uncoated Available to Order*
    $117.67
  • A78563 ACT 3/8 3/8 2.5000 (2-1/2) 90° 1 Uncoated Available to Order*
    $117.67
  • A78505 ACT 3/8 3/8 2.5000 (2-1/2) 90° 4 Uncoated Available to Order*
    $117.67
  • A78477 ACT 3/8 3/8 2.5000 (2-1/2) 90° 6 Uncoated Available to Order*
    $117.67
  • A78571 ACT 3/8 3/8 2.5000 (2-1/2) 100° 1 Uncoated Available to Order*
    $117.67
  • A78513 ACT 3/8 3/8 2.5000 (2-1/2) 100° 4 Uncoated Available to Order*
    $117.67
  • A78485 ACT 3/8 3/8 2.5000 (2-1/2) 100° 6 Uncoated Available to Order*
    $117.67
  • A78579 ACT 3/8 3/8 2.5000 (2-1/2) 120° 1 Uncoated Available to Order*
    $117.67
  • A78521 ACT 3/8 3/8 2.5000 (2-1/2) 120° 4 Uncoated Available to Order*
    $117.67
  • A78493 ACT 3/8 3/8 2.5000 (2-1/2) 120° 6 Uncoated Available to Order*
    $117.67
  • A47091 ACT 3/4 1/2 2-3/4 60° 6 Uncoated 53
    $102.66
  • A47057 ACT 3/4 1/2 2-3/4 60° 3 Uncoated 50
    $102.66
  • A47033 ACT 3/4 1/2 2-3/4 60° 1 Uncoated 28
    $102.66
  • A47099 ACT 3/4 1/2 2-3/4 82° 6 Uncoated 45
    $102.66
  • A47065 ACT 3/4 1/2 2-3/4 82° 3 Uncoated 42
    $102.66
  • A47041 ACT 3/4 1/2 2-3/4 82° 1 Uncoated 20
    $102.66
  • A47107 ACT 3/4 1/2 2-3/4 90° 6 Uncoated 40
    $102.66
  • A47073 ACT 3/4 1/2 2-3/4 90° 3 Uncoated 13
    $102.66
  • A47049 ACT 3/4 1/2 2-3/4 90° 1 Uncoated 50
    $102.66
  • A56088 ACT 3/4 3/8 2-3/4 100° 6 Uncoated 24
    $102.66
  • A56080 ACT 3/4 3/8 2-3/4 100° 3 Uncoated 23
    $102.66
  • A56072 ACT 3/4 3/8 2-3/4 100° 1 Uncoated 64
    $102.66

* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.

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