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100° x 1/4" Diameter Countersink. 1 Flute, Cobalt, Uncoated. 1/4" Shank, 1.500" OAL. KEO® Made in USA (Arch Cutting Tools) Part #919-000-625

100° x 1/4" Diameter Countersink. 1 Flute, Cobalt, Uncoated. 1/4" Shank, 1.500" OAL. KEO® Made in USA (Arch Cutting Tools) Part #919-000-625
ARCH CUTTING TOOLS
919000625
919-000-625
KEO-103-055438
919-000-625
103-055438
Weight: 0.24 LBS
Brand: ARCH CUTTING TOOLS
$16.72
(21% off)
$13.21
each
7/31/2026
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Product Description

Keo® Cobalt Single Flute Countersinks Are Precision-Ground Tools Engineered For Producing Smooth, Chatter-Free Chamfers And Countersinks In A Wide Variety Of Materials. Constructed From Premium Cobalt High-Speed Steel (M42), These Countersinks Offer Superior Heat And Wear Resistance, Making Them Ideal For Cutting Tough Alloys, Stainless Steels, Titanium, And Cast Iron. The Single-Flute Design Provides A Highly Positive Rake Angle For Clean, Concentric Cutting And Reduced Chatter—Especially Useful In Portable Or Less-Rigid Setups. The Result Is A Precise, Smooth Surface Finish And Improved Tool Life.

  • Material: Premium cobalt steel for exceptional heat and wear resistance.Design: Single flute construction ensures smooth, chatter-free operation.
  • Precision Cutting: Designed for precise, concentric countersinking and deburring.
  • Versatile Use: Ideal for machining carbon steels, alloys, stainless steel, and other tough materials.
  • Finish: Polished surface enhances chip evacuation and reduces buildup.
  • Durability: Superior hardness extends tool life, even under high cutting temperatures.
  • Applications: Perfect for countersinking holes for flat-head screws and removing burrs.
  • Made in USA: Manufactured to exacting standards for consistent performance.
  • This photo of this item only REPRESENTS this tool, please read the items specifics for detailed information.

This item is part of our complete offering of ARCH Cutting Tools, trusted for high-performance CNC machining across drilling, milling, holemaking, and indexable applications. Explore Patriot HP Cutting Tools for advanced solid carbide and high-performance machining solutions, KEO Cutting Tools for precision countersinks, center drills, and holemaking tools, Ultra-Dex Cutting Tools for productive indexable milling, drilling, and insert-based machining, and Revere Cutting Tools for high-performance carbide end mills and milling solutions. Visit our main ARCH Cutting Tools page to compare tool styles, coatings, geometries, and performance options to find the right solution for your application.

Made in U.S.A.
Shipping & Delivery Options
FLUSHING, MICHIGAN, USA
  • UPS

Suncoast Shipping Deals

Min. order amount Shipping Option Special Rate Max Weight
$100.00 UPS Blue 2 Business Days $19.99 4 LBS
Note: Special vendor shipping deals are destination-based and may not be available in all ZIP codes. If this rate is not available for your shipping address, standard shipping options will be shown at checkout.
$50.00 MINIMUM ORDER
If ordered by 2:30pm Eastern Standard Time Arch will ship same Business Day.
Factory Stock
6
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Additional Product Details

Technical Details

Manufacturer
ARCH CUTTING TOOLS
Manufacturer Part Number
919-000-625
Cutter Diameter
0.2500" (1/4")
Overall Length
1.500"
Shank Diameter
0.2500" 1/4"
Number Of Flutes
1
Tool Coating
Bright Uncoated
Tool Substrate Material
Cobalt
Hand Cutting Direction
Right Hand
Included Angle
100°
Country of Origin
U.S.A.
Series
919
Single Or Double End
Single End
Brand
KEO®
Type
Countersink
Shank Length
0.7500"

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