Osg 3318390 Carbide Jobber Drill Bit 3.9 Mm WD1

Product Description

The OSG 3318390 is a solid carbide jobber length drill bit designed for precision hole-making in demanding materials. Built from solid carbide, it delivers the rigidity and wear resistance required for drilling hardened steels, cast iron, stainless steel, and similar tough alloys. The WD1 coating reduces friction and extends tool life in high-cycle production environments. At 3.9 mm in diameter with a 120-degree drill point angle and a standard point geometry, this bit produces accurate, clean entry holes. It is sized for use in CNC machining centers, drill presses, and handheld pneumatic or electric tools with compatible collets or chucks.

This drill bit is suited for metalworking and machining applications in manufacturing, fabrication, and maintenance-repair-operations (MRO) environments. The 5xD flute-to-diameter ratio and 22 mm flute length make it appropriate for short-to-medium depth holes typical in sheet metal, structural components, and precision-machined parts. The straight-cylindrical shank with a 4.0 mm diameter seats securely in standard ER collet chucks and keyless drill chucks. Right-hand spiral flutes evacuate chips efficiently during operation, reducing heat buildup and recutting.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard materials
• WD1 coating reduces friction and extends cutting edge life
• 120-degree drill point angle for accurate, centered starts on standard point applications
• Right-hand cut with regular spiral fluting for efficient chip evacuation
• Straight-cylindrical shank fits standard ER collets and drill chucks
• 5xD flute ratio suited for short-to-medium depth drilling

Compatibility

Designed as an OEM-style jobber length drill bit for use in CNC machining centers, drill presses, and rotary tools accepting a 4.0 mm straight-cylindrical shank.

Installation Notes

Installation and operation should be performed by qualified machinists or tooling technicians familiar with cutting tool setup. Secure the shank fully in the collet or chuck before use and verify runout is within acceptable limits for the application. Always operate within the recommended speed and feed range for solid carbide tooling in the workpiece material. Do not use this bit in hand drilling applications where axial control cannot be maintained, as carbide is brittle and susceptible to breakage under side-loading or impact.