Osg 15201005 Cobalt Jobber Drill Bit Wire Size 7 Tin

Product Description

The OSG 15201005 is a jobber-length drill bit designed for high-performance drilling in steel and alloy steel applications. Built from cobalt high-speed steel and finished with a Titanium Nitride (TiN) coating, this bit handles demanding production environments where standard HSS tooling wears prematurely. Wire size 7 corresponds to a decimal diameter of 0.2010 inches (5.11 mm). The 130-degree split point angle promotes self-centering and reduces walking on entry. A tapered web with R-thinning reduces thrust force and improves chip clearance. Overall length is 4-1/4 inches with a 2-7/16-inch flute length, making it compatible with standard drill chucks and quick-change systems that accept a 1/4-inch straight-cylindrical shank.

This bit is suited for machinists, maintenance mechanics, and fabricators working in job shop or production environments. Typical applications include blind hole drilling, cross-hole drilling, and through-hole work in mild steel, alloy steel, and similar ferrous materials. The regular spiral flute geometry provides efficient chip evacuation in both hand-held and machine-mounted operations. It belongs to OSG Series 1500, a line intended for general-purpose to high-performance drilling in metalworking trades.

Key Features

• Cobalt construction for elevated heat resistance compared to standard HSS bits
• TiN coating extends tool life and reduces friction in ferrous materials
• 130-degree drill point angle with R-thinned web for self-centering and reduced thrust
• Right-hand cut, 2-flute spiral geometry for effective chip removal
• 1/4-inch straight-cylindrical shank fits standard drill chucks and collet holders
• Rated for blind hole, cross hole, drilling, and self-centering tool applications

Compatibility

Designed for use in steel and alloy steel workpieces as indicated by Primary Workpiece Material Code P. Compatible with any drill press, CNC machining center, or hand drill accepting a 1/4-inch straight-cylindrical shank. No coolant-through capability; suitable for external coolant or dry cutting only.

Installation Notes

This bit should be installed and operated by a qualified machinist or tooling technician familiar with speeds and feeds for cobalt drill bits in ferrous materials. Secure the shank fully in the chuck or collet before operation and verify runout is within acceptable limits. Do not exceed recommended RPM for the diameter and material combination. When replacing a worn bit, inspect the chuck or collet for wear that could cause slippage or premature tool failure.