Osg 220-2188 Solid Carbide Jobber Drill Bit 7/32 in

Product Description

The OSG 220-2188 is a solid carbide jobber-length drill bit designed for general-purpose hole-making in metalworking applications. It measures 7/32 inches (0.2188 inches decimal) in diameter with a 3-inch overall length and a 1-3/4 inch flute length. The 118-degree web-thinned point promotes accurate self-centering and reduces the thrust required to enter the workpiece. Two spiral flutes in a regular helix configuration clear chips efficiently during blind-hole and through-hole drilling. The bright, uncoated finish makes wear inspection straightforward. Machinists, tool-and-die technicians, and maintenance mechanics install this bit in standard drill presses, CNC machining centers, and handheld power drills.

This bit is rated for use in steel, alloy steel, stainless steel, cast iron, aluminum, aluminum alloy, and aluminum silicate workpieces, covering ISO material codes P, M, K, and N. It is suited for blind-hole drilling, cross-hole operations, general drilling, and self-centering entry without a pilot hole. The straight-cylindrical shank seats directly into standard drill chucks and collets sized for 7/32-inch shanks. The Series 220D designation places it in OSG's general-purpose solid carbide line, making it a common stock item in production and maintenance shop environments.

Key Features

• Solid carbide construction for rigidity and wear resistance in hard and abrasive workpiece materials
• 118-degree web-thinned point for self-centering entry and reduced drilling thrust
• Two regular-spiral flutes for efficient chip evacuation in blind and through holes
• Bright/uncoated finish allows straightforward visual wear inspection
• Straight-cylindrical shank fits standard drill chucks and collets without adapters
• Diameter tolerance of +0 to -0.013 mm for consistent hole sizing

Compatibility

Designed as a general-purpose OEM-style replacement jobber drill bit for applications requiring a 7/32-inch solid carbide bit in steel, stainless steel, cast iron, and aluminum workpieces. Fits any standard drill chuck or collet accepting a 7/32-inch straight-cylindrical shank.

Installation Notes

Install and remove this bit with the spindle fully stopped and the machine isolated from power. Solid carbide is brittle compared to high-speed steel - avoid side loading, interrupted cuts beyond the bit's rated capacity, and dropping the tool on hard surfaces. Verify chuck or collet runout before use, as excessive runout accelerates edge chipping. Always operate within the machine manufacturer's recommended speed and feed range for the workpiece material and bit diameter.