Osg 300-2188 Chucking Reamer 7/32 in Solid Carbide

Product Description

The OSG 300-2188 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. Built to Series 300D standards, it produces tight-tolerance bores with a diameter tolerance of +0.0001 to +0.0004 inches, making it suitable for work requiring accurate hole sizing. The straight flute geometry and right-hand cutting direction deliver clean, consistent finishes in a wide range of workpiece materials. With a 3-inch overall length and a 0.2188-inch (7/32 inch) diameter, this reamer is sized for small-bore work handled by machinists, toolroom technicians, and precision fabricators.

This reamer is used in general machining environments where finished hole diameter and surface finish tolerance are critical. Typical applications include through-hole and blind-hole finishing in steel, aluminum, cast iron, and similar machinable materials. The straight shank allows direct chucking in standard drill chucks, collets, or machine spindles on drill presses, lathes, and CNC machining centers. It is not designed for coolant-through delivery and is best suited for applications where cutting fluid is applied externally.

Key Features

• Solid carbide construction provides rigidity and wear resistance for accurate hole finishing
• Reamer diameter tolerance of +0.0001 to +0.0004 inches ensures repeatable, tight-tolerance sizing
• Four-flute straight design for smooth cutting action and consistent chip evacuation
• Bright/uncoated finish — ready to use as supplied with no additional prep required
• Straight cylindrical shank for direct mounting in standard chucks and collets
• Series 300D standard carbide reamer suitable for a broad range of general machining applications

Compatibility

Designed as a standard solid carbide chucking reamer for general machining applications requiring a 7/32-inch (0.2188-inch) finished bore diameter.

Installation Notes

Chucking reamers are installed by qualified machinists or toolroom technicians. Secure the straight shank firmly in a matched collet or drill chuck before operation and verify runout before cutting. This reamer does not support coolant-through delivery — apply cutting fluid externally and ensure adequate lubrication for the workpiece material. Reamers remove only a small amount of stock; pre-drill or bore the hole to the correct undersize before reaming to avoid overloading the tool.