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KEO 53221-TIN Fast-Cutting Single-Flute Countersink - Fast-Cutting Single-Flute Countersinks
KEOFast-Cutting Single-Flute Countersinks

KEO 53221-TIN Fast-Cutting Single-Flute Countersink

The KEO Countersink: 110° is a fast-cutting single-flute countersink, type TiN Coated High Speed Steel, with a 1 1/2 in body diameter and 3/4 in shank (MPN 53221-TIN).

SKU 3G-OTH-185580

Also listed as: 53221TIN · 53221 TIN

Brand
KEO
Item
53221-TIN Fast-Cutting Single-Flute Countersink
Part Number
53221-TIN
Category
Fast-Cutting Single-Flute Countersinks
Available to Order
Also known as:53221-TINKEO
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.

Technical Specifications

KEO
Manufacturer Part Number
53221-TIN
Type
TiN Coated High Speed Steel
Flute
1
Shank
3/4 in
Body Dia
1 1/2 in

Technical Documents

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

Product Description

The KEO Countersink: 110° is a fast-cutting single-flute countersink, type TiN Coated High Speed Steel, with a 1 1/2 in body diameter and 3/4 in shank (MPN 53221-TIN).

Frequently Asked Questions

What is a KEO 110° single-flute countersink used for?

A KEO 110° single-flute countersink is used to create a conical recess in a workpiece, typically for a flathead screw or bolt. The 110° angle is common in aerospace and sheet-metal applications. KEO's TiN-coated high-speed steel design provides wear resistance for consistent, chatter-free countersinking in ferrous and non-ferrous materials.

What are the specifications of the KEO 53221-TIN countersink?

The KEO 53221-TIN is a 110° single-flute countersink with a 1 1/2 in body diameter and a 3/4 in shank. It is made from TiN-coated high-speed steel for extended tool life. This fast-cutting design is ideal for precision chamfering and deburring in industrial machining operations.

Where to buy KEO countersinks worldwide?

3G Electric supplies KEO countersinks like the 53221-TIN to customers worldwide. As a global industrial solutions provider, we handle full logistics, customs clearance, and delivery to your facility. Contact us for pricing and lead time on this and other KEO cutting tools.

How to select the right KEO countersink for my application?

Select a KEO countersink based on the required angle (e.g., 110° for aerospace), material (TiN-coated HSS for steel), and shank size to match your toolholder. For the 53221-TIN, the 1 1/2 in body diameter suits larger fastener heads. Always match flute count to material type for optimal chip evacuation and finish.

Used in

Common applications for KEO
General machining — KEO single-flute countersinks for deburring and chamfering holes in steel and aluminum.
Automotive repair — KEO 82° countersinks for creating seats for flathead screws in engine and chassis components.
Aerospace manufacturing — KEO TiAlN-coated carbide countersinks for precision chamfering of fastener holes in hard alloys.
MRO operations — KEO left-hand keyseat cutters for milling keyways in shafts during equipment repair.
Metal fabrication — KEO 90° countersinks for chamfering plate and structural steel before welding.
Machine shop — KEO 100° countersinks for deburring cross-drilled holes in hydraulic manifolds.
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KEO Products

3G Electric supplies KEO fast-cutting single-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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