Triumph Twist Drill 012643 Wire Size 43 Hss Drill Bit

Product Description

The TRIUMPH TWIST DRILL 012643 is a jobber-length twist drill bit sized at wire gauge 43, equivalent to 0.0890 inches in diameter. Built from M7 high-speed steel with a gold oxide coating, this bit delivers extended wear resistance in high-volume drilling applications. The 135-degree split point provides self-centering entry without the need for a center punch, reducing walkout on hard or smooth surfaces. A right-hand spiral flute with web-thinned, tapered web construction improves chip evacuation and reduces cutting torque. Licensed HVAC, mechanical, and general trade professionals rely on this series for repetitive small-hole work in metal and non-metal substrates.

The 012643 is engineered for drilling into alloy steel, carbon steel, and wood, making it a practical choice across metal fabrication, HVAC sheet-metal work, mechanical assembly, and general maintenance applications. With a 1.25-inch flute length and 2.25-inch overall length, it fits standard keyless and keyed drill chucks used in bench drills and handheld power tools. The straight-cylindrical shank seats securely in 3-jaw chucks without slippage. The T2HD series is rated as heavy-duty, high-performance tooling appropriate for production or repetitive drilling environments.

Key Features

• Wire gauge 43 size at 0.0890 inches diameter for precise small-hole work
• M7 high-speed steel construction rated for heavy-duty, high-performance use
• 135-degree split point with self-centering geometry eliminates center-punch step
• Gold oxide coating reduces friction and extends cutting edge life
• Web-thinned, tapered web improves chip flow and reduces thrust force
• Right-hand spiral flute with regular helix for reliable chip evacuation

Compatibility

Designed for use with standard straight-cylindrical chuck systems; compatible with drilling alloy steel, carbon steel, and wood workpieces as specified in the T2HD series application data.

Installation Notes

This bit is installed by a machinist, fabricator, or trade professional using a keyed or keyless 3-jaw drill chuck. Secure the straight-cylindrical shank fully into the chuck before operation to prevent runout. Match spindle speed to workpiece material and bit diameter per standard machining reference charts. Coolant-through is not supported on this bit; apply cutting fluid externally when drilling steel to extend tool life.