Chicago-latrobe 44142 Wire Size 72 Jobber Drill Bit Hss

Product Description

The CHICAGO-LATROBE 44142 is a jobber length drill bit in wire gauge size 72, measuring 0.0250 inches in diameter. Built from high speed steel with an oxide coating, it delivers general-purpose performance in ferrous metals including cast iron and steel. The 118-degree standard point angle provides a balanced entry with minimal walking on flat stock. At 1.125 inches overall length with a 0.3125-inch flute, this bit is sized for close-clearance drilling tasks where compact tooling is required. Licensed HVAC, plumbing, electrical, and mechanical contractors reach for wire gauge bits like this when drilling small pilot holes, sensor ports, or wiring pass-throughs in sheet metal and structural steel.

The 44142 is intended for general-purpose drilling in cast iron and steel. Its straight-cylindrical shank seats directly into standard drill chucks and collet holders without adapters. The regular spiral flute geometry and tapered web configuration support chip evacuation in through-hole applications. This bit is suited to benchtop drill presses, hand drills, and CNC drilling fixtures where a wire size 72 diameter is specified. It conforms to DIN 338 standards, making it a recognized format for trade and industrial use.

Key Features

• Wire gauge size 72 at 0.0250 inches diameter for precision small-hole work
• High speed steel construction handles cast iron and steel without dedicated coolant
• Oxide coating provides surface hardness and basic corrosion resistance
• 118-degree standard point angle for general-purpose entry on flat and curved stock
• Web-thinned, tapered web design aids chip clearance and reduces thrust force
• Straight-cylindrical shank fits standard drill chucks and collet systems
• Meets DIN 338 dimensional standard

Compatibility

Designed for general-purpose drilling in cast iron and steel workpieces. Compatible with any drill chuck or collet holder accepting a 0.0250-inch straight-cylindrical shank. Part of the CHICAGO-LATROBE Series 150 jobber length drill bit line.

Installation Notes

Secure the shank fully in the chuck and verify zero runout before drilling to prevent breakage at this small diameter. Use the lowest practical feed rate for hand drilling to avoid snapping the bit under lateral load. Coolant is not required per design specification, but a light cutting oil improves hole quality and extends tool life in steel. Always wear appropriate eye protection and ensure the workpiece is clamped before beginning the cut.