Countersinks
Which material is right for your job?
Pick a family to narrow SKUs.
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 A78646 ACT 1/8 1/8 1.5000 (1-1/2) 60° 1 Uncoated Available to Order* $16.04 -
A78635 ACT 1/8 1/8 1.5000 (1-1/2) 60° 1 Uncoated Available to Order* $38.18 -
A78612 ACT 1/8 1/8 1.5000 (1-1/2) 60° 4 Uncoated Available to Order* $11.21 -
A78583 ACT 1/8 1/8 1.5000 (1-1/2) 60° 4 Uncoated Available to Order* $38.18 -
A78525 ACT 1/8 1/8 1.5000 (1-1/2) 60° 6 Uncoated Available to Order* $38.18 -
A78463 ACT 1/4 1/4 1.5000 (1-1/2) 60° 0 Uncoated Available to Order* $20.95 -
A47085 ACT 1/8 1/8 1-1/2 60° 6 Uncoated 15 $18.27 -
A47051 ACT 1/8 1/8 1-1/2 60° 3 Uncoated 9 $18.27 -
A47027 ACT 1/8 1/8 1-1/2 60° 1 Uncoated 16 $18.27 -
A46548 ACT 1/2 1/2 3-7/8 60° 4 Uncoated 31 $57.36 -
A46533 ACT 1/4 3/16 1-7/16 60° 1 Uncoated 31 $17.98 -
A78654 ACT 1/8 1/8 1.5000 (1-1/2) 82° 1 Uncoated Available to Order* $16.04 -
A78643 ACT 1/8 1/8 1.5000 (1-1/2) 82° 1 Uncoated Available to Order* $38.18 -
A78620 ACT 1/8 1/8 1.5000 (1-1/2) 82° 4 Uncoated Available to Order* $11.21 -
A78591 ACT 1/8 1/8 1.5000 (1-1/2) 82° 4 Uncoated Available to Order* $38.18 -
A78533 ACT 1/8 1/8 1.5000 (1-1/2) 82° 6 Uncoated Available to Order* $38.18 -
A78464 ACT 1/4 1/4 2.0313 60° 0 Uncoated Available to Order* $27.54 -
A47093 ACT 1/8 1/8 1-1/2 82° 6 Uncoated 70 $18.27 -
A47059 ACT 1/8 1/8 1-1/2 82° 3 Uncoated 22 $18.27 -
A47035 ACT 1/8 1/8 1-1/2 82° 1 Uncoated 73 $18.27 -
A46553 ACT 1/2 1/2 3-7/8 82° 4 Uncoated 45 $57.36 -
A46538 ACT 1/4 3/16 1-7/16 82° 1 Uncoated 100 $17.98 -
A78662 ACT 1/8 1/8 1.5000 (1-1/2) 90° 1 Uncoated Available to Order* $16.04 -
A78628 ACT 1/8 1/8 1.5000 (1-1/2) 90° 4 Uncoated Available to Order* $11.21 -
A78559 ACT 1/8 1/8 1.5000 (1-1/2) 90° 1 Uncoated Available to Order* $38.18 -
A78501 ACT 1/8 1/8 1.5000 (1-1/2) 90° 4 Uncoated Available to Order* $38.18 -
A78473 ACT 1/8 1/8 1.5000 (1-1/2) 90° 6 Uncoated Available to Order* $38.18 -
A78465 ACT 1/4 1/4 2.0000 (2) 60° 0 Uncoated Available to Order* $35.17 -
A47101 ACT 1/8 1/8 1-1/2 90° 6 Uncoated 28 $18.27 -
A47067 ACT 1/8 1/8 1-1/2 90° 3 Uncoated 73 $18.27 -
A47043 ACT 1/8 1/8 1-1/2 90° 1 Uncoated 45 $18.27 -
A46549 ACT 5/8 1/2 4 60° 4 Uncoated 16 $64.61 -
A46543 ACT 1/4 3/16 1-7/16 90° 1 Uncoated 100 $17.98 -
A78596 ACT 1/8 1/8 1.5000 (1-1/2) 100° 1 Uncoated Available to Order* $16.04 -
A78567 ACT 1/8 1/8 1.5000 (1-1/2) 100° 1 Uncoated Available to Order* $38.18 -
A78538 ACT 1/8 1/8 1.5000 (1-1/2) 100° 4 Uncoated Available to Order* $11.21 -
A78509 ACT 1/8 1/8 1.5000 (1-1/2) 100° 4 Uncoated Available to Order* $38.18 -
A78481 ACT 1/8 1/8 1.5000 (1-1/2) 100° 6 Uncoated Available to Order* $38.18 -
A78454 ACT 1/4 1/4 2.0313 82° 0 Uncoated Available to Order* $27.54 -
A56082 ACT 1/8 1/8 1-1/2 100° 6 Uncoated 11 $13.03 -
A56074 ACT 1/8 1/8 1-1/2 100° 3 Uncoated 59 $18.27 -
A56066 ACT 1/8 1/8 1-1/2 100° 1 Uncoated 13 $18.27 -
A46554 ACT 5/8 1/2 4 82° 4 Uncoated 34 $64.61 -
A46534 ACT 3/8 1/4 1-21/32 60° 1 Uncoated 22 $20.50 -
A78604 ACT 1/8 1/8 1.5000 (1-1/2) 120° 1 Uncoated Available to Order* $16.04 -
A78575 ACT 1/8 1/8 1.5000 (1-1/2) 120° 1 Uncoated Available to Order* $38.18 -
A78546 ACT 1/8 1/8 1.5000 (1-1/2) 120° 4 Uncoated Available to Order* $11.21 -
A78517 ACT 1/8 1/8 1.5000 (1-1/2) 120° 4 Uncoated Available to Order* $38.18 -
A78489 ACT 1/8 1/8 1.5000 (1-1/2) 120° 6 Uncoated Available to Order* $38.18 -
A78455 ACT 1/4 1/4 2.0000 (2) 82° 0 Uncoated Available to Order* $35.17 -
A47086 ACT 3/16 3/16 2 60° 6 Uncoated 24 $19.43 -
A47052 ACT 3/16 3/16 2 60° 3 Uncoated 21 $19.43 -
A47028 ACT 3/16 3/16 2 60° 1 Uncoated 17 $19.43 -
A46550 ACT 3/4 1/2 4-1/8 60° 4 Uncoated 17 $82.34 -
A46539 ACT 3/8 1/4 1-21/32 82° 1 Uncoated 36 $20.50 -
A78647 ACT 3/16 3/16 2.0000 (2) 60° 1 Uncoated Available to Order* $17.28 -
A78636 ACT 3/16 3/16 2.0000 (2) 60° 1 Uncoated Available to Order* $49.10 -
A78613 ACT 3/16 3/16 2.0000 (2) 60° 4 Uncoated Available to Order* $11.50 -
A78584 ACT 3/16 3/16 2.0000 (2) 60° 4 Uncoated Available to Order* $49.10 -
A78526 ACT 3/16 3/16 2.0000 (2) 60° 6 Uncoated Available to Order* $49.10 -
A78468 ACT 1/4 1/4 1.5000 (1-1/2) 82° 0 Uncoated Available to Order* $20.95 -
A47094 ACT 3/16 3/16 2 82° 6 Uncoated 25 $19.43 -
A47060 ACT 3/16 3/16 2 82° 3 Uncoated 100 $19.43 -
A47036 ACT 3/16 3/16 2 82° 1 Uncoated 51 $19.43 -
A46555 ACT 3/4 1/2 4-1/8 82° 4 Uncoated 22 $82.34 -
A46544 ACT 3/8 1/4 1-21/32 90° 1 Uncoated 80 $20.50 -
A78655 ACT 3/16 3/16 2.0000 (2) 82° 1 Uncoated Available to Order* $17.28 -
A78644 ACT 3/16 3/16 2.0000 (2) 82° 1 Uncoated Available to Order* $49.10 -
A78621 ACT 3/16 3/16 2.0000 (2) 82° 4 Uncoated Available to Order* $11.50 -
A78592 ACT 3/16 3/16 2.0000 (2) 82° 4 Uncoated Available to Order* $49.10 -
A78534 ACT 3/16 3/16 2.0000 (2) 82° 6 Uncoated Available to Order* $49.10 -
A78458 ACT 1/4 1/4 1.5000 (1-1/2) 90° 0 Uncoated Available to Order* $20.95 -
A47102 ACT 3/16 3/16 2 90° 6 Uncoated 100 $19.43 -
A47068 ACT 3/16 3/16 2 90° 3 Uncoated 83 $19.43 -
A47044 ACT 3/16 3/16 2 90° 1 Uncoated 48 $19.43 -
A46551 ACT 7/8 1/2 4-1/4 60° 4 Uncoated 18 $96.73 -
A46535 ACT 1/2 1/4 1-13/32 60° 1 Uncoated 39 $26.19 -
A78663 ACT 3/16 3/16 2.0000 (2) 90° 1 Uncoated Available to Order* $17.28 -
A78629 ACT 3/16 3/16 2.0000 (2) 90° 4 Uncoated Available to Order* $11.50 -
A78560 ACT 3/16 3/16 2.0000 (2) 90° 1 Uncoated Available to Order* $49.10 -
A78502 ACT 3/16 3/16 2.0000 (2) 90° 4 Uncoated Available to Order* $49.10 -
A78474 ACT 3/16 3/16 2.0000 (2) 90° 6 Uncoated Available to Order* $49.10 -
A78459 ACT 1/4 1/4 2.0313 90° 0 Uncoated Available to Order* $27.54 -
A56083 ACT 3/16 3/16 2 100° 6 Uncoated 19 $19.43 -
A56075 ACT 3/16 3/16 2 100° 3 Uncoated 37 $19.43 -
A56067 ACT 3/16 3/16 2 100° 1 Uncoated 19 $19.43 -
A46556 ACT 7/8 1/2 4-1/4 82° 4 Uncoated 79 $96.73 -
A46540 ACT 1/2 1/4 1-13/32 82° 1 Uncoated 21 $26.19 -
A78597 ACT 3/16 3/16 2.0000 (2) 100° 1 Uncoated Available to Order* $17.28 -
A78568 ACT 3/16 3/16 2.0000 (2) 100° 1 Uncoated Available to Order* $49.10 -
A78539 ACT 3/16 3/16 2.0000 (2) 100° 4 Uncoated Available to Order* $11.50 -
A78510 ACT 3/16 3/16 2.0000 (2) 100° 4 Uncoated Available to Order* $49.10 -
A78482 ACT 3/16 3/16 2.0000 (2) 100° 6 Uncoated Available to Order* $49.10 -
A78460 ACT 1/4 1/4 2.0000 (2) 90° 0 Uncoated Available to Order* $35.17 -
A47087 ACT 1/4 1/4 2 60° 6 Uncoated 78 $22.14 -
A47053 ACT 1/4 1/4 2 60° 3 Uncoated 74 $22.14 -
A47029 ACT 1/4 1/4 2 60° 1 Uncoated 100 $22.14 -
A46552 ACT 1 1/2 4-3/8 60° 4 Uncoated 50 $100.48 -
A46545 ACT 1/2 1/4 1-13/32 90° 1 Uncoated 54 $26.19 -
A78605 ACT 3/16 3/16 2.0000 (2) 120° 1 Uncoated Available to Order* $17.28
* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.