Osg 300-0472 Chucking Reamer 1.2mm Straight Flute Carbide

Product Description

The OSG 300-0472 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. With a 1.2 mm (0.0472 inch) diameter and a right-hand cutting direction, this reamer holds a tight diameter tolerance of +0.0001 to +0.0004 inches, making it suitable where consistent bore size and surface finish are critical. The 4-flute straight geometry provides clean chip evacuation in through and blind holes. At 38 mm overall length with a 10 mm flute length, it fits compact toolholders and short-reach setups. Machinists, tool-and-die makers, and CNC operators working in precision environments are the primary users of this tool.

The 300-0472 is intended for general machining applications requiring accurate, repeatable hole finishing in small-diameter bores. The straight cylindrical shank mates with standard collet chucks and drill chucks commonly found on CNC machining centers, drill presses, and manual mills. The bright, uncoated finish suits a wide range of workpiece materials where coating interaction is a concern or where regrinding is anticipated. This reamer does not include coolant-through capability and is not a dowel pin or over/under size reamer.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision reaming
• 1.2 mm diameter with tolerance of +0.0001 to +0.0004 inches for tight bore control
• 4-flute straight geometry for smooth cutting action and consistent chip clearance
• Straight cylindrical shank for compatibility with standard collet and drill chucks
• Bright/uncoated finish suitable for general machining and regrinding applications
• Right-hand cutting direction per standard CNC and manual machine operation

Compatibility

Designed as an OEM-style replacement or standard tooling option for general machining applications requiring small-diameter hole finishing; part of the OSG 300D series.

Installation Notes

Chucking reamers are installed by machining professionals in correctly sized collet chucks or drill chucks rated for the shank diameter. Always ensure the spindle is fully stopped and the machine is powered off before changing tooling. Pre-drill the hole to the appropriate undersize before reaming to achieve the specified tolerance. Use of cutting fluid is recommended to extend tool life and improve surface finish, even though coolant-through is not available on this reamer.