Osg 300-1440 Chucking Reamer Size 27 Solid Carbide

Product Description

The OSG 300-1440 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. Ground to a wire size 27 diameter of 0.1440 inches with a tolerance of +0.0001 to +0.0004 inches, this reamer delivers tight, repeatable hole tolerances on the bench or in a machining center. The straight flute geometry and bright uncoated finish make it well suited for reaming through a range of workpiece materials where chip flow is straightforward. Machinists and toolroom technicians reach for this reamer when a drilled hole needs to be brought to a precise final diameter without the complexity of a spiral-flute tool.

The 300-1440 fits standard chucking setups on manual mills, drill presses, CNC machining centers, and lathes equipped with a tailstock or live tooling. With an overall length of 2.5 inches and a flute length of 0.75 inches, it is sized for shallow-to-moderate depth reaming in smaller bores. The straight cylindrical shank seats cleanly in collet chucks, drill chucks, and end mill holders. This is an OSG Series 300D standard carbide reamer intended for general machining production and toolroom work.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision reaming
• Wire size 27 diameter: 0.1440 inches with a tolerance of +0.0001 to +0.0004 inches
• 4-flute straight geometry for consistent chip evacuation in through and blind holes
• Bright uncoated finish suitable for a broad range of general machining materials
• Straight cylindrical shank compatible with collet chucks and drill chucks
• Right-hand cutting direction; no coolant-through feature required for standard use

Compatibility

Designed as an OEM-style chucking reamer for general machining applications where a wire size 27 straight-shank reamer is specified. Verify spindle RPM and feed rate recommendations for solid carbide tooling before use in a specific setup.

Installation Notes

Installation is performed by qualified machinists or toolroom technicians. Secure the straight cylindrical shank firmly in a collet chuck or drill chuck, ensuring runout is minimized before engaging the workpiece. Power down or lock out the spindle completely before changing or inspecting the tool. Solid carbide is brittle — avoid side loading, interrupted cuts beyond the tool's rated capacity, or dropping the reamer on hard surfaces.