Osg 300-2420 Chucking Reamer Letter C 0.2420 in Carbide

Product Description

The OSG 300-2420 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. Manufactured to Letter C sizing, it delivers a reamed diameter of 0.2420 inches with a tight tolerance of +0.0001 to +0.0004 inches, making it suitable for applications requiring close-tolerance bore finishing. The straight flute geometry and right-hand cutting direction provide clean, consistent material removal. With an overall length of 3 inches and a 1 inch flute length, this reamer fits standard drill chuck setups on mills, lathes, and drill presses. It is part of the OSG 300D series and carries a bright, uncoated finish.

This reamer is intended for use in general machining environments where precise hole sizing is required on ferrous and non-ferrous materials. The straight-cylindrical shank seats directly in a standard collet or drill chuck without additional adapters. The 4-flute configuration balances chip evacuation with surface finish quality. Machinists, toolroom technicians, and CNC operators working with close-tolerance bores in the 0.2000 to 0.2499 inch diameter range will find this a direct fit for production and maintenance work.

Key Features

• Letter C diameter — 0.2420 inches with tolerance of +0.0001 to +0.0004 inches
• Solid carbide construction for wear resistance and dimensional stability
• 4-flute straight configuration for consistent chip flow and surface finish
• Straight-cylindrical shank for direct chuck or collet mounting
• Right-hand cutting direction, standard for conventional reaming operations
• Bright, uncoated finish — suitable for general machining without coolant-through requirement

Compatibility

Designed as a general-purpose chucking reamer compatible with standard drill chucks and collet holders accepting straight-cylindrical shanks in the 0.2000 to 0.2499 inch diameter range.

Installation Notes

Installation is performed by machinists or toolroom technicians using standard CNC or manual machine tool setups. Secure the straight shank firmly in a collet or drill chuck before operation, and verify runout is within acceptable limits prior to cutting. Pre-drill or bore the hole to appropriate stock-removal allowance before reaming. Do not use this tool as a drill — reaming requires a pre-existing pilot hole.