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KEO 120° Six-Flute Countersink, 2-1/2 in Body Dia, 1 in Shank, Cobalt Steel - Smooth-Finish Six-Flute Countersinks
KEOSmooth-Finish Six-Flute Countersinks

KEO 120° Six-Flute Countersink, 2-1/2 in Body Dia, 1 in Shank, Cobalt Steel

KEO Smooth-Finish Six-Flute Countersinks.

SKU 3G-OTH-188388

Brand
KEO
Item
120° Six-Flute Countersink, 2-1/2 in Body Dia, 1 in Shank, Cobalt Steel
Category
Smooth-Finish Six-Flute Countersinks
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Technical Specifications

KEO
Manufacturer Part Number
55616

Technical Documents

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

Product Description

KEO Smooth-Finish Six-Flute Countersinks.

Frequently Asked Questions

What is the KEO 55616 countersink used for?

The KEO 55616 is a 120° six-flute countersink designed for creating smooth, burr-free chamfers on drilled holes in metal. It is commonly used in machining and fabrication for deburring and countersinking operations on steel, stainless steel, and other alloys, especially in high-production environments.

What are the specifications of the KEO 55616 countersink?

The KEO 55616 is a 120° countersink with six flutes, a 2 1/2 in body diameter, and a 1 in shank. It is made from cobalt steel for heat resistance and durability. The manufacturer part number is 55616, and it is designed for smooth-finish applications in industrial metalworking.

Where to buy the KEO 55616 countersink worldwide?

You can source the KEO 55616 countersink through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we provide reliable sourcing for this KEO tool.

How to select the right KEO countersink for metalworking?

Select a KEO countersink based on hole size, material, and desired finish. For hard metals, choose cobalt steel like the 55616. Match the body diameter to your hole size and use a 120° angle for standard fastener heads. Ensure shank diameter fits your tool holder for stable operation.

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

KEO Products

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

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Compatible alternatives & equivalents

Cross-referenced by specification & description
This six-flute countersink is designed for deburring and countersinking holes in metal, producing a smooth finish. The six-flute design reduces chatter and vibration during operation. Made from cobalt, it features a 120° angle, 3-inch body diameter, and 1-inch shank
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This six-flute countersink is designed for deburring and countersinking holes in metal, producing a smooth finish. The six-flute design reduces chatter and vibration during operation. Made from cobalt, it features a 120° angle, 3-inch body diameter, and 1-inch shank
This six-flute countersink produces smooth, burr-free 120° chamfers on drilled holes. The flute design reduces chatter and vibration for precision deburring and countersinking in metal. Made from cobalt steel for heat resistance. Body diameter 1-1/2 in, shank 3/4 in
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This six-flute countersink produces smooth, burr-free 120° chamfers on drilled holes. The flute design reduces chatter and vibration for precision deburring and countersinking in metal. Made from cobalt steel for heat resistance. Body diameter 1-1/2 in, shank 3/4 in
This countersink is designed for creating smooth, burr-free 120° chamfers on drilled holes in metal. Its six-flute cobalt construction provides chatter-free operation and a fine finish. Suitable for use in drill presses, milling machines, or handheld drills for precision countersinking
KEO
This countersink is designed for creating smooth, burr-free 120° chamfers on drilled holes in metal. Its six-flute cobalt construction provides chatter-free operation and a fine finish. Suitable for use in drill presses, milling machines, or handheld drills for precision countersinking
This countersink features a 120° included angle and six flutes for smooth, burr-free chamfering on drilled holes. The cobalt construction supports use on hard materials such as hardened steels and stainless alloys. Body diameter is 1 inch
KEO
This countersink features a 120° included angle and six flutes for smooth, burr-free chamfering on drilled holes. The cobalt construction supports use on hard materials such as hardened steels and stainless alloys. Body diameter is 1 inch
This six-flute countersink with a 120° included angle produces smooth, chatter-free chamfers and countersinks in metal. The cobalt steel construction offers heat resistance for extended tool life. Suitable for use in drill presses and handheld tools, it is commonly employed in machining and fabrication to prepare holes for fasteners
KEO
This six-flute countersink with a 120° included angle produces smooth, chatter-free chamfers and countersinks in metal. The cobalt steel construction offers heat resistance for extended tool life. Suitable for use in drill presses and handheld tools, it is commonly employed in machining and fabrication to prepare holes for fasteners
This six-flute countersink is designed for deburring and countersinking holes in metal, producing a smooth finish. The 120° included angle and cobalt steel construction provide heat resistance and durability. Its flute geometry reduces chatter and vibration during operation, suitable for precision work in industrial machining and fabrication
KEO
This six-flute countersink is designed for deburring and countersinking holes in metal, producing a smooth finish. The 120° included angle and cobalt steel construction provide heat resistance and durability. Its flute geometry reduces chatter and vibration during operation, suitable for precision work in industrial machining and fabrication

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This 120° countersink features six flutes for smooth deburring and chamfering of holes in metal. The AlTiN-coated cobalt construction provides heat resistance and extended tool life in high-speed machining of hardened steels and alloys. Suitable for general industrial applications requiring a clean, finished edge
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This 120° countersink features six flutes for smooth deburring and chamfering of holes in metal. The AlTiN-coated cobalt construction provides heat resistance and extended tool life in high-speed machining of hardened steels and alloys. Suitable for general industrial applications requiring a clean, finished edge
This 60° countersink features a six-flute design for smooth, burr-free chamfering and deburring in metal, plastic, and wood. The AlTiN coating reduces heat buildup and improves surface finish. Suitable for precision machining and industrial manufacturing applications
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This 60° countersink features a six-flute design for smooth, burr-free chamfering and deburring in metal, plastic, and wood. The AlTiN coating reduces heat buildup and improves surface finish. Suitable for precision machining and industrial manufacturing applications
This 100° countersink features six flutes and an AlTiN-coated high-speed steel body for producing smooth, burr-free chamfers. It is suited for deburring and countersinking holes in metalworking applications such as machining and fabrication
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This 100° countersink features six flutes and an AlTiN-coated high-speed steel body for producing smooth, burr-free chamfers. It is suited for deburring and countersinking holes in metalworking applications such as machining and fabrication
This six-flute countersink produces smooth, burr-free chamfered holes in metal, plastic, or wood. The 100° angle is suited for precision countersinking in aerospace and automotive applications. Made from AlTiN-coated high speed steel for extended tool life
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This six-flute countersink produces smooth, burr-free chamfered holes in metal, plastic, or wood. The 100° angle is suited for precision countersinking in aerospace and automotive applications. Made from AlTiN-coated high speed steel for extended tool life
This six-flute countersink produces smooth, burr-free chamfered holes in metal, plastic, and composite materials. The AlTiN coating extends tool life in abrasive or high-temperature applications. Body diameter is 3/8 in
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This six-flute countersink produces smooth, burr-free chamfered holes in metal, plastic, and composite materials. The AlTiN coating extends tool life in abrasive or high-temperature applications. Body diameter is 3/8 in
This KEO countersink features a 100° included angle and six flutes for smooth, chatter-free cutting. The 2-inch body diameter and 3/4-inch shank suit standard toolholders. Cobalt construction provides heat resistance for machining hardened steels and stainless alloys. Used to create chamfered recesses for flat-head screws in metalworking
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This KEO countersink features a 100° included angle and six flutes for smooth, chatter-free cutting. The 2-inch body diameter and 3/4-inch shank suit standard toolholders. Cobalt construction provides heat resistance for machining hardened steels and stainless alloys. Used to create chamfered recesses for flat-head screws in metalworking
This 90° countersink features six flutes for chatter-free operation, producing a smooth finish on drilled holes. The cobalt steel construction offers heat resistance for extended tool life. Suitable for chamfering and deburring ferrous and non-ferrous materials in machining applications
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This 90° countersink features six flutes for chatter-free operation, producing a smooth finish on drilled holes. The cobalt steel construction offers heat resistance for extended tool life. Suitable for chamfering and deburring ferrous and non-ferrous materials in machining applications
This 90° countersink features six flutes for smooth, chatter-free operation when creating chamfers and countersinks in metal. The TiN-coated cobalt construction provides extended tool life. Commonly used for deburring holes and preparing surfaces for flat-head screws in machining and fabrication
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This 90° countersink features six flutes for smooth, chatter-free operation when creating chamfers and countersinks in metal. The TiN-coated cobalt construction provides extended tool life. Commonly used for deburring holes and preparing surfaces for flat-head screws in machining and fabrication