Irwin IR73831 Hss Jobber Drill Bit 31/64 in 3/8 in Shank

Product Description

The IRWIN IR73831 is a high speed steel (HSS) jobber-length drill bit designed for general-purpose drilling in metal, wood, and plastic. The bit features a 31/64-inch cutting diameter and a 3/8-inch reduced shank, allowing it to seat in standard 3/8-inch and larger drill chucks without requiring a full-diameter chuck capacity. The bright finish indicates an uncoated HSS construction suited for a wide range of shop and field drilling tasks. Electricians, plumbers, HVAC technicians, and general contractors rely on jobber-length bits for everyday through-hole and clearance-hole work across multiple trade applications.

This drill bit is intended for use in hand-held drills, drill presses, and right-angle drill attachments where a 3/8-inch shank is required. The jobber length provides a practical balance between rigidity and reach, making it well suited for drilling clearance holes in sheet metal, conduit hangers, pipe flanges, and structural members. The reduced shank design is particularly useful when a full 31/64-inch chuck capacity is not available on the tool being used.

Key Features

• 31/64-inch cutting diameter for precise clearance and through-hole drilling
• 3/8-inch reduced shank fits standard 3/8-inch and larger drill chucks
• High speed steel construction provides durability across metal, wood, and plastic
• Jobber length balances reach and rigidity for general trade work
• Bright uncoated finish suitable for a broad range of drilling applications

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill bit compatible with any 3/8-inch or larger keyed or keyless drill chuck, including hand-held drills and drill presses commonly used in HVAC, plumbing, and electrical trade work.

Installation Notes

Secure the 3/8-inch shank fully into the drill chuck before operation and confirm the chuck is tightened properly to prevent slippage. Use appropriate cutting speed for the material being drilled and apply cutting fluid when drilling ferrous metals to extend bit life and reduce heat buildup. Always wear eye protection when operating drill bits, and ensure the workpiece is clamped or secured before drilling.

Technical Specifications

• Cutting Diameter: 31/64 inches
• Shank Diameter: 3/8 inches
• Shank Type: Reduced shank
• Length Type: Jobber
• Material: High speed steel (HSS)
• Finish: Bright (uncoated)
• UPC: 024721738318
• Sold As: Each

Standard Information

• Brand: IRWIN
• Manufacturer Part Number: IR73831