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The OSG 300-2031 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. It features a 13/64 inch (0.2031 inch decimal) diameter with a tight tolerance of +0.0001 to +0.0004 inches, making it suited for work requiring accurate, repeatable bore sizing. The reamer runs 3 inches overall length with a 1 inch straight flute and a straight cylindrical shank. With four flutes and a right-hand cut, it delivers clean, consistent finishes. Machinists and toolroom technicians install this type of reamer as a final sizing pass after drilling or boring operations.
This reamer is intended for general machining environments where hole diameter accuracy is critical. The solid carbide construction handles harder workpiece materials better than high-speed steel alternatives and maintains cutting edge integrity over longer production runs. The bright, uncoated finish suits a wide range of ferrous and non-ferrous materials. It is typically used in CNC machining centers, manual mills, and drill presses where the straight shank is held in a collet chuck or drill chuck. The compact 3 inch OAL makes it practical for benchtop and short-clearance setups.
Designed as a standard solid carbide chucking reamer for general machining use in CNC and manual machine tools that accept a straight cylindrical shank.
Machinist or toolroom personnel should secure the straight shank firmly in a collet chuck or keyed drill chuck before use. Ensure the workpiece is clamped and the spindle is at a safe, controlled speed appropriate for the material being reamed before engaging the cutter. Always apply cutting fluid where the material and operation call for it to prevent galling and extend tool life. Inspect flute condition before each use — solid carbide is rigid but can chip if the tool is mishandled or dropped.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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