Osg 300-1890 Chucking Reamer 0.1890 in Solid Carbide

Product Description

The OSG 300-1890 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. With a reamer diameter of 0.1890 inches (wire gauge size 12) and a diameter tolerance of +0.0001 to +0.0004 inches, this tool delivers accurate, repeatable bore sizing in production and job-shop environments. The four-flute straight design produces clean, consistent finishes in through and blind holes. At 2.75 inches overall length with a 0.875-inch flute length and a straight cylindrical shank, it mounts directly in drill chucks, collet chucks, or floating holders on CNC and manual machines.

This reamer is suited for light finishing passes in ferrous and non-ferrous materials where close hole tolerances are required. It is commonly used in machining centers, turret lathes, and drill presses for finishing drilled or bored holes to final dimension. The bright, uncoated finish makes it appropriate for a broad range of base materials without the risk of coating-related dimensional offset. Machinists, toolroom technicians, and CNC operators working on precision components will find this reamer well-suited to standard finishing operations where tight tolerance control is critical.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision finishing cuts
• 0.1890 inch diameter with +0.0001 to +0.0004 inch tolerance for accurate final bore sizing
• Four straight flutes for smooth cutting action and easy chip evacuation
• Straight cylindrical shank for direct chuck or collet mounting
• Bright, uncoated finish suitable for general machining across a wide range of materials
• Right-hand cutting direction, part of the OSG 300D series for standard carbide reaming applications

Compatibility

Designed as a standard solid carbide chucking reamer for general machining applications requiring a 0.1890 inch finished bore diameter.

Installation Notes

This reamer is installed and operated by machinists and toolroom professionals. Secure the straight shank firmly in a drill chuck, ER collet, or floating reamer holder before use, and verify runout with an indicator before taking a finishing pass. Always feed at the correct rate for the material and reamer diameter to avoid overloading the flutes. Remove chips regularly on blind-hole applications to prevent packing.