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.
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Compare SKU Vendor Size (D1) Shank Diameter (D2) Overall Length (L1) Included Angle (A) Number of Flutes Coating In Stock Price Quantity A78640 ACT 1/2 1/2 3.0000 (3) 60° 1 Uncoated Available to Order* $165.96 -
A78588 ACT 1/2 1/2 3.0000 (3) 60° 4 Uncoated Available to Order* $165.96 -
A78530 ACT 1/2 1/2 3.0000 (3) 60° 6 Uncoated Available to Order* $165.96 -
A78556 ACT 1/2 1/2 3.0000 (3) 82° 1 Uncoated Available to Order* $165.96 -
A78498 ACT 1/2 1/2 3.0000 (3) 82° 4 Uncoated Available to Order* $165.96 -
A78470 ACT 1/2 1/2 3.0000 (3) 82° 6 Uncoated Available to Order* $165.96 -
A78564 ACT 1/2 1/2 3.0000 (3) 90° 1 Uncoated Available to Order* $165.96 -
A78506 ACT 1/2 1/2 3.0000 (3) 90° 4 Uncoated Available to Order* $165.96 -
A78478 ACT 1/2 1/2 3.0000 (3) 90° 6 Uncoated Available to Order* $165.96 -
A78572 ACT 1/2 1/2 3.0000 (3) 100° 1 Uncoated Available to Order* $165.96 -
A78514 ACT 1/2 1/2 3.0000 (3) 100° 4 Uncoated Available to Order* $165.96 -
A78486 ACT 1/2 1/2 3.0000 (3) 100° 6 Uncoated Available to Order* $165.96 -
A47092 ACT 1 1/2 3 60° 6 Uncoated 32 $164.31 -
A47058 ACT 1 1/2 3 60° 3 Uncoated 54 $164.31 -
A47034 ACT 1 1/2 3 60° 1 Uncoated 56 $164.31 -
A78580 ACT 1/2 1/2 3.0000 (3) 120° 1 Uncoated Available to Order* $165.96 -
A78522 ACT 1/2 1/2 3.0000 (3) 120° 4 Uncoated Available to Order* $165.96 -
A78494 ACT 1/2 1/2 3.0000 (3) 120° 6 Uncoated Available to Order* $165.96 -
A47100 ACT 1 1/2 3 82° 6 Uncoated 46 $164.31 -
A47066 ACT 1 1/2 3 82° 3 Uncoated 66 $164.31 -
A47042 ACT 1 1/2 3 82° 1 Uncoated 40 $164.31 -
A47108 ACT 1 1/2 3 90° 6 Uncoated 37 $164.31 -
A47074 ACT 1 1/2 3 90° 3 Uncoated 63 $164.31 -
A47050 ACT 1 1/2 3 90° 1 Uncoated 22 $164.31 -
A56089 ACT 1 1/2 3 100° 6 Uncoated 51 $164.31 -
A56081 ACT 1 1/2 3 100° 3 Uncoated 20 $164.31 -
A56073 ACT 1 1/2 3 100° 1 Uncoated 46 $164.31
* Lead times can vary from 1–10 business days. Call (908) 98-ATLAS or email sales@atlascuttingtools.com for details.