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
    A78659 ACT 1/2 1/2 3.0000 (3) 82° 1 Uncoated Available to Order*
    $28.29
  • A78625 ACT 1/2 1/2 3.0000 (3) 82° 4 Uncoated Available to Order*
    $19.34
  • A78667 ACT 1/2 1/2 3.0000 (3) 90° 1 Uncoated Available to Order*
    $28.29
  • A78633 ACT 1/2 1/2 3.0000 (3) 90° 4 Uncoated Available to Order*
    $19.34
  • A78601 ACT 1/2 1/2 3.0000 (3) 100° 1 Uncoated Available to Order*
    $28.29
  • A78543 ACT 1/2 1/2 3.0000 (3) 100° 4 Uncoated Available to Order*
    $19.34
  • A78609 ACT 1/2 1/2 3.0000 (3) 120° 1 Uncoated Available to Order*
    $28.29
  • A78551 ACT 1/2 1/2 3.0000 (3) 120° 4 Uncoated Available to Order*
    $19.34
  • A78652 ACT 5/8 5/8 3.5000 (3-1/2) 60° 1 Uncoated Available to Order*
    $40.94
  • A78618 ACT 5/8 5/8 3.5000 (3-1/2) 60° 4 Uncoated Available to Order*
    $28.08
  • A78660 ACT 5/8 5/8 3.5000 (3-1/2) 82° 1 Uncoated Available to Order*
    $40.94
  • A78626 ACT 5/8 5/8 3.5000 (3-1/2) 82° 4 Uncoated Available to Order*
    $28.08
  • A78668 ACT 5/8 5/8 3.5000 (3-1/2) 90° 1 Uncoated Available to Order*
    $40.94
  • A78634 ACT 5/8 5/8 3.5000 (3-1/2) 90° 4 Uncoated Available to Order*
    $28.08
  • A78602 ACT 5/8 5/8 3.5000 (3-1/2) 100° 1 Uncoated Available to Order*
    $40.94
  • A78544 ACT 5/8 5/8 3.5000 (3-1/2) 100° 4 Uncoated Available to Order*
    $28.08
  • A78610 ACT 5/8 5/8 3.5000 (3-1/2) 120° 1 Uncoated Available to Order*
    $40.94
  • A78552 ACT 5/8 5/8 3.5000 (3-1/2) 120° 4 Uncoated Available to Order*
    $28.08
  • A78653 ACT 3/4 3/4 4.0000 (4) 60° 1 Uncoated Available to Order*
    $58.51
  • A78619 ACT 3/4 3/4 4.0000 (4) 60° 4 Uncoated Available to Order*
    $37.85
  • A78661 ACT 3/4 3/4 4.0000 (4) 82° 1 Uncoated Available to Order*
    $58.51
  • A78627 ACT 3/4 3/4 4.0000 (4) 82° 4 Uncoated Available to Order*
    $37.85
  • A78595 ACT 3/4 3/4 4.0000 (4) 90° 1 Uncoated Available to Order*
    $58.51
  • A78537 ACT 3/4 3/4 4.0000 (4) 90° 4 Uncoated Available to Order*
    $37.85
  • A78603 ACT 3/4 3/4 4.0000 (4) 100° 1 Uncoated Available to Order*
    $58.51
  • A78545 ACT 3/4 3/4 4.0000 (4) 100° 4 Uncoated Available to Order*
    $37.85
  • A78611 ACT 3/4 3/4 4.0000 (4) 120° 1 Uncoated Available to Order*
    $58.51
  • A78553 ACT 3/4 3/4 4.0000 (4) 120° 4 Uncoated Available to Order*
    $37.85

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

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