Osg 257-2280 Combo Drill Reamer 0.228 in Solid Carbide

Product Description

The OSG 257-2280 is a solid carbide combo drill reamer designed for combined drilling and reaming operations in a single pass. With a reamer diameter of 0.228 inches and a flute length of 2.239 inches, it delivers precise hole sizing and surface finish in one tool. The bright uncoated finish suits a wide range of base materials where coating adhesion is not required. At 4 inches overall length and 0.07 pounds, it is compact enough for tight setups while providing adequate reach for typical through-hole and blind-hole applications. Machinists and toolroom technicians use this type of combination tool to reduce cycle time and eliminate a separate reaming operation.

This combo drill reamer is suited for precision machining environments where hole tolerance and finish quality are critical. It fits CNC machining centers, drill presses, and manual mills using a cylindrical shank mount. The 0.228-inch cylindrical shank diameter allows direct installation into standard collets or chuck systems. Applications include production runs and prototype work in metalworking shops requiring tight hole diameter control. Right-hand cutting direction is standard for conventional spindle rotation.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision hole finishing
• 0.228 inch reamer diameter for accurate final hole sizing
• 2.239 inch flute length provides sufficient chip clearance and cutting engagement
• Bright uncoated finish compatible with a broad range of workpiece materials
• Right-hand cutting direction for use with standard spindle rotation
• Cylindrical shank at 0.4375 inches fits common collet and chuck systems

Compatibility

Designed as an OEM-style replacement or direct-fit tool for CNC and manual machining setups requiring a cylindrical-shank combo drill reamer in the 0.228-inch diameter class.

Installation Notes

Installation should be performed by a qualified machinist familiar with cutting tool mounting procedures. Ensure the spindle is fully stopped and locked before inserting or removing the tool from the collet or chuck. Verify runout with a dial indicator after mounting to confirm concentricity before cutting. Follow shop safety protocols and applicable OSHA machine guarding requirements during setup and operation.