Osg 10189005 Screw Machine Drill Bit 0.189in Cobalt Hss

Product Description

The OSG 10189005 is a screw machine length drill bit engineered for high-performance drilling in steel and alloy steel applications. Built from cobalt high speed steel with a coated finish, this bit delivers extended tool life and heat resistance under demanding shop and field conditions. It features a 2-flute spiral configuration, a 130-degree drill point angle with R-thinned web, and a straight-cylindrical shank for secure chuck engagement. The 0.189-inch (No. 12 wire gauge) diameter and compact screw machine length make it well-suited for tight-clearance work where a jobber-length bit would not fit. Licensed machinists, millwrights, and maintenance mechanics are the primary users.

This drill bit is designed for use in production and maintenance environments where precise hole sizing in ferrous materials is required. The screw machine (stub) length provides added rigidity, reducing deflection and improving hole accuracy in steel and alloy steel workpieces. With an overall length of 3 inches and a flute length of 1-3/16 inches, it fits standard drill presses, CNC machining centers, and hand-held power drills equipped with a straight-shank chuck. It is sold individually and belongs to OSG Series 1000.

Key Features

• Cobalt high speed steel construction for improved heat and wear resistance over standard HSS
• 130-degree drill point angle for reduced thrust and clean entry on steel and alloy steel
• R-thinned web reduces cutting resistance and improves chip evacuation
• Screw machine (stub) length increases rigidity and minimizes deflection in tight spaces
• Straight-cylindrical shank compatible with standard drill chucks and collet holders
• Coated finish extends tool life in high-cycle production drilling

Compatibility

Designed as a direct-fit replacement or production drill bit for applications requiring a No. 12 wire gauge (0.189-inch) hole in steel and alloy steel. Compatible with any drill press, machining center, or power drill accepting a straight-cylindrical shank in the 0.1500-inch to 0.2000-inch diameter range.

Installation Notes

Install and remove this bit only with the drill or machine powered off and the spindle fully stopped. Use appropriate cutting fluid or coolant for steel drilling even though this bit does not support through-coolant delivery. Secure the straight-cylindrical shank fully within the chuck or collet to the recommended grip depth before operation. Disposal of worn tooling should follow applicable shop safety and metal-waste handling procedures.