Osg 300-2559 Chucking Reamer 6.5mm Solid Carbide

Product Description

The OSG 300-2559 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. With a 6.5 mm (0.2559 inch) diameter and a six-flute straight configuration, it produces accurate, smooth bores to a tight tolerance of +0.0001 to +0.0005 inches. The bright, uncoated carbide construction provides rigidity and wear resistance across a range of workpiece materials. Overall length is 83 mm with a 29 mm flute length, making it suited for shallow to medium-depth reaming operations. It mounts via a straight cylindrical shank for use in standard drill chucks or collet holders on machining centers and lathes.

This reamer is intended for production and job-shop environments where consistent bore diameter and surface finish are required. Its straight-flute geometry is well suited for reaming through-holes and short blind holes in ferrous and non-ferrous materials. The right-hand cutting direction and standard carbide grade make it a reliable choice for high-volume general machining. It is sold individually and is a direct fit wherever a 6.5 mm straight-shank chucking reamer is called out on a print.

Key Features

• 6.5 mm (0.2559 inch) reamer diameter with +0.0001 to +0.0005 inch tolerance for precise bore finishing
• Solid carbide construction for rigidity and extended tool life
• Six straight flutes for smooth cutting action and good chip evacuation
• Bright, uncoated finish suitable for general-purpose machining
• Straight cylindrical shank compatible with standard chucks and collet holders
• Right-hand cut, 83 mm OAL, 29 mm flute length — OSG Series 300D

Compatibility

Designed as an OEM-style replacement or direct-use chucking reamer for general machining applications requiring a 6.5 mm straight-shank reamer in any CNC or manual machine tool accepting a straight cylindrical shank.

Installation Notes

Installation is performed by machinists or toolroom technicians. Secure the shank fully into a collet, drill chuck, or toolholder and verify runout before use. De-energize and lock out the machine spindle before changing tooling. Follow shop-standard speeds and feeds for carbide reamers; avoid running dry on materials that require cutting fluid.