1-3/8″ Reduced Shank Drill Bit Cobalt 1/2″ Reduced Shank D/ACO1-3/8 Instant Buy

Technical description for a single cobalt drill bit designed for hard-metal drilling with a 1/2″ reduced shank (Model D/ACO).

Specs

Quantity: 1 piece

Diameter: 1-3/8″ (1.375″)

Shank: 1/2″ reduced

Material: Cobalt-coated high-speed steel (HSS with cobalt)

Model: D/ACO

Use geometry: intended for metal drilling

Flute count: not specified

Overall length: not specified

Features

Heat resistance: Cobalt composition provides enhanced heat resistance for drilling through hard metals such as stainless steel and alloy steels.

Wear life: Extended wear life in demanding drilling tasks compared with standard HSS bits.

Shank design: 1/2″ reduced shank suitable for practical mounting in standard tooling setups.

Cut quality: Deburred-cutting performance helps minimize secondary finishing in metalworking, fabrication, and maintenance tasks.

Use cases: Designed for professional metal fabrication, maintenance, and machining environments tackling hard-metal drilling projects.

Physical

Diameter: 1-3/8″

Shank: 1/2″ reduced

Material: Cobalt-coated high-speed steel

Usage geometry: intended for metal drilling

Notes: exact flute count and overall length not specified