Irwin IR63920 Hss Jobber Drill Bit 5/16 in 135 Deg

Product Description

The IRWIN IR63920 is a high-speed steel jobber-length drill bit with a titanium nitride (TiN) coating designed for general-purpose drilling in metal, wood, and plastics. It features a 135-degree split point that self-centers on contact, reducing the need for a center punch and minimizing walking on hard surfaces. The bit measures 5/16 inches in diameter with an overall length of 4.5 inches and a flute length of 3.1875 inches. Hardness is rated at 80 HRC. This bit is sold individually and is suited for use by electricians, plumbers, HVAC technicians, and general tradespeople who need a reliable, fast-cutting drill bit for everyday field and shop work.

The IR63920 is intended for jobber-length applications where a standard reach is sufficient. Its TiN coating reduces friction and extends cutting life compared to uncoated HSS bits. The split point geometry is well suited for drilling into steel, copper, PVC, and similar materials encountered in mechanical and electrical trade work. It fits any standard 3-jaw drill chuck that accepts a 5/16-inch shank.

Key Features

• Titanium nitride (TiN) coating reduces friction and increases surface hardness for extended bit life
• 135-degree split point self-centers on contact, minimizing bit walking
• 80 HRC hardness rating for durability in high-speed drilling applications
• Jobber-length design at 4.5 inches overall with 3.1875 inches of flute for chip evacuation
• Sold individually — unit of measure is each

Compatibility

Designed as a standard jobber-length HSS drill bit compatible with any 3-jaw chuck accepting a 5/16-inch shank, suitable for use in corded and cordless drills commonly used in HVAC, plumbing, and electrical trade applications.

Installation Notes

A licensed tradesperson or experienced DIYer can install this bit in any compatible drill. Ensure the chuck is fully tightened before operation and that the workpiece is securely clamped or supported. When drilling into metal, use appropriate cutting fluid to extend bit life and reduce heat buildup. Inspect the cutting edges before each use and replace the bit if chipping or dulling is observed.

Technical Specifications

• Drill Diameter: 5/16 inches
• Overall Length: 4.5 inches
• Flute Length: 3.1875 inches
• Point Angle: 135 degrees
• Point Type: Split
• Material: High-Speed Steel (HSS)
• Coating: Titanium Nitride (TiN)
• Hardness: 80 HRC
• Drill Style: Jobber Length
• UPC: 042526639203

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR63920