Chicago-latrobe 77645 Jobber Drill Bit 1/8 in Carbide Tipped

Product Description

The CHICAGO-LATROBE 77645 is a carbide tipped jobber length drill bit designed for general-purpose drilling in demanding trade and industrial applications. Built with a 1/8 inch diameter and a 118-degree standard point angle, it delivers consistent entry geometry across a wide range of materials including hardened steel, cast iron, and abrasive composites. The bright coating finish leaves the cutting edges clean and sharp without added lubricant film. At 2.75 inches overall length with a 1.625 inch flute length, this bit fits standard drill chucks and right-angle drivers common on job sites. Web-thinned construction reduces thrust force at entry and extends tool life in repetitive drilling cycles.

This bit is suited for use in residential and commercial construction, HVAC fabrication, electrical rough-in, and plumbing installations where precise small-diameter holes are required. The straight cylindrical shank with a 1/8 inch diameter seats securely in keyless or keyed chucks. The regular spiral flute with right-hand cut clears chips efficiently in through-hole drilling. Electricians, plumbers, HVAC technicians, and general contractors will find this bit appropriate for sheet metal, light structural steel, and hard plastics encountered in everyday trade work.

Key Features

• Carbide tipped construction for drilling hardened and abrasive materials
• 118-degree standard point angle for general-purpose entry geometry
• Web-thinned tapered web reduces thrust and improves chip clearance
• Bright finish coating for clean, uncoated cutting edges
• Right-hand spiral flute with regular helix for efficient chip evacuation
• Straight cylindrical shank fits standard 1/8 inch drill chucks

Compatibility

Designed as a general-purpose OEM-style jobber length drill bit compatible with standard straight-shank drill chucks accepting 1/8 inch diameter tooling.

Installation Notes

Installation of this bit is performed by licensed tradespeople or qualified operators using standard drill presses, handheld power drills, or right-angle drivers. Secure the shank fully in the chuck before applying power and verify chuck tightness to prevent slipping. When drilling metal, use appropriate cutting fluid or coolant to manage heat buildup and preserve carbide tip integrity. Follow shop safety protocols and applicable OSHA standards for rotating tool operation.