Osg 15359405 Cobalt Jobber Drill Bit 23/64 in Tin

Product Description

The OSG 15359405 is a cobalt jobber-length drill bit with a titanium nitride (TiN) coating, designed for high-performance drilling in steel and alloy steel. It features a 130-degree drill point angle with R-thinned web geometry for improved chip evacuation and reduced thrust force at entry. The 2-flute spiral configuration with regular helix promotes smooth cutting action across a range of hole types. With an overall length of 5-5/16 inches and a 3/8-inch straight-cylindrical shank, this bit fits standard drill chucks and is built for repeated use in demanding production and maintenance environments. Licensed trades and machining professionals specify cobalt-grade tooling for work-hardened and abrasion-resistant base metals.

This bit is suited for blind hole drilling, cross-hole operations, through-hole drilling, and self-centering applications in steel and alloy steel workpieces. It carries a primary workpiece material code of P, consistent with ISO classification for ferrous metals. The 3-1/2-inch flute length provides adequate chip clearance for moderate-depth holes. Typical users include maintenance machinists, millwrights, pipefitters, and fabricators who need a durable, general-purpose cobalt drill for repetitive ferrous drilling tasks.

Key Features

• Cobalt construction with TiN coating for extended tool life in steel and alloy steel
• 130-degree split point with R-thinned web reduces walking and lowers required thrust
• Right-hand cut with regular spiral flute for efficient chip removal
• 23/64 inch (0.3594 inch / 9.13 mm) diameter within +0 to -0.022 mm tolerance
• 3/8-inch straight-cylindrical shank for standard chuck compatibility
• Rated for blind hole, cross-hole, and self-centering tool applications

Compatibility

Designed as an OEM-style replacement or direct-use jobber drill for standard 3-flute or 3-jaw drill chucks accepting a 3/8-inch straight shank, in bench, floor, or CNC drill press setups used for steel and alloy steel drilling in the 0.3500 to 0.4000 inch diameter range.

Installation Notes

Install and operate this drill bit in a properly rated drill press, magnetic drill, or CNC machine with the spindle fully powered down before loading or removing the bit from the chuck. Secure the 3/8-inch shank firmly to the rated chuck capacity before initiating the spindle. Use appropriate cutting fluid or coolant recommended for cobalt tooling in ferrous materials to preserve coating integrity and extend service life. Dispose of worn tooling per applicable shop safety protocols.