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KEO 60° Four-Flute Machine Countersink, 5/8 in Body Dia, Cobalt Steel - Four-Flute Machine Countersinks
KEOFour-Flute Machine Countersinks

KEO 60° Four-Flute Machine Countersink, 5/8 in Body Dia, Cobalt Steel

KEO Four-Flute Machine Countersinks.

SKU 3G-OTH-185899

Also listed as: 919000521 · 919 000 521

Brand
KEO
Item
60° Four-Flute Machine Countersink, 5/8 in Body Dia, Cobalt Steel
Part Number
919-000-521
Category
Four-Flute Machine Countersinks
Available to Order
Also known as:919-000-521KEO
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

KEO
Manufacturer Part Number
919-000-521

Technical Documents

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KEO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

KEO Four-Flute Machine Countersinks.

Frequently Asked Questions

What is the KEO 60° countersink used for?

The KEO 60° countersink is used for deburring and countersinking holes in metal workpieces. Its 4-flute design provides smooth cutting action, making it suitable for machining operations in industrial manufacturing, automotive, and aerospace applications where precise 60° chamfers are required.

What are the specifications of the KEO 919-000-521 countersink?

The KEO 919-000-521 is a 60° four-flute machine countersink with a 5/8 in body diameter, made from cobalt steel. It is designed for use in drill presses and milling machines to create clean, accurate chamfers. The cobalt material offers heat resistance for extended tool life in ferrous materials.

Where to buy KEO countersinks worldwide?

3G Electric supplies KEO countersinks worldwide, handling full logistics and customs clearance for international orders. As a global industrial equipment distributor since 1990, we source and deliver the KEO 919-000-521 and other cutting tools to your facility. Contact us for availability and lead time.

How to select the right KEO countersink for your application?

Select a KEO countersink based on the required chamfer angle (e.g., 60°), body diameter matching your hole size, and material compatibility. For hard metals, choose cobalt or HSS variants. Ensure the shank fits your tool holder. 3G Electric can help match the correct KEO part number to your machining needs.

Used in

Common applications for KEO
Metalworking — KEO plain-tip center drills for creating accurate starting points in lathe operations
Automotive manufacturing — KEO bell-tip center drills for countersinking holes in engine components
Aerospace machining — KEO radius-tip center drills for reducing stress risers in critical parts
General machining — KEO keyseat cutters for milling keyways in shafts and gears
Tool and die making — KEO TiN-coated center drills for extended tool life in hardened steels
Precision engineering — KEO cobalt center drills for high-temperature alloy applications
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KEO Products

3G Electric supplies KEO four-flute machine countersinks. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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This four-flute machine countersink is made of TiN coated high speed steel for wear resistance. It has a 2 in body diameter and a 3/4 in shank. The 60° angle and four-flute design reduce chatter and produce a smooth finish. Used for creating conical recesses in metal or plastic for flush-mounting flat-head screws, as well as chamfering and deburring holes
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This four-flute machine countersink is made of TiN coated high speed steel for wear resistance. It has a 2 in body diameter and a 3/4 in shank. The 60° angle and four-flute design reduce chatter and produce a smooth finish. Used for creating conical recesses in metal or plastic for flush-mounting flat-head screws, as well as chamfering and deburring holes
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This KEO countersink features a 90° included angle and four flutes, with a 1-inch body diameter made from cobalt steel. It is used for deburring and chamfering holes in metal workpieces, creating a clean seat for flat-head screws. Suitable for drill presses, milling machines, or handheld tools in machining and fabrication applications

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