Irwin IR63924 Hss Jobber Drill Bit 3/8 in 135 Deg

Product Description

The IRWIN IR63924 is a jobber-length high speed steel drill bit with a titanium nitride (TiN) coating designed for professionals who need fast material removal and extended bit life in production or field drilling applications. The bit measures 3/8 inches in diameter with a 5 inches overall length and a 3.625 inches flute length. The 135-degree split point geometry reduces walking on entry and requires less feed pressure compared to standard 118-degree points. At 80 HRC hardness, the HSS blank provides toughness and heat resistance for drilling through steel, cast iron, aluminum, and similar materials.

This drill bit is suited for electricians, plumbers, HVAC technicians, and general contractors who need a reliable jobber-length bit for drilling through metal framing, pipe hangers, brackets, and structural steel in residential and commercial applications. The jobber-length format makes it compatible with standard 3/8-inch and 1/2-inch keyed or keyless chucks on corded and cordless drills. It is sold individually, making it practical as a single replacement or supplemental bit for an existing set.

Key Features

• Titanium nitride (TiN) coating increases surface hardness and reduces friction for longer service life
• 135-degree split point starts on contact and reduces bit walking without center punching
• 80 HRC hardness rating provides durability in demanding drilling applications
• Jobber-length format fits standard drill chucks and is compatible with common drill press setups
• 3.625 inches flute length provides adequate chip clearance for through-hole drilling in typical material thicknesses

Compatibility

Designed as a jobber-length replacement drill bit suitable for use with standard 3/8-inch and 1/2-inch drill chucks in handheld drills and bench-mounted drill presses.

Installation Notes

Install this bit into a properly rated chuck and tighten securely before operation. Ensure workpieces are clamped or secured before drilling to prevent rotation. Use appropriate cutting fluid or lubricant when drilling ferrous metals to reduce heat buildup and prolong bit life. Inspect the cutting edges before each use and replace the bit if chipping or excessive wear is observed.

Technical Specifications

• Drill Diameter: 3/8 inches
• Overall Length: 5 inches
• Flute Length: 3.625 inches
• Point Angle: 135 degrees
• Point Type: Split Point
• Material: High Speed Steel (HSS)
• Coating: Titanium Nitride (TiN)
• Hardness: 80 HRC
• Bit Series: Jobber Length
• Sold As: Each

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR63924