Osg 257-2010 Combo Drill Reamer 0.201 in Solid Carbide

Product Description

The OSG 257-2010 is a solid carbide combo drill reamer designed to drill and ream in a single operation. It produces a finished hole to a 0.201-inch diameter without requiring a separate reaming step. The bright uncoated finish suits applications where coating buildup or chemical interaction is a concern. With a 1.974-inch flute length and a 4-inch overall length, this tool fits standard machining center setups and CNC drilling operations. The cylindrical shank at 0.201 inches in diameter accepts standard toolholders. At 0.06 pounds, it is lightweight and easy to handle during tool changes.

The 257-2010 is suited for precision hole-finishing in metalworking and machining environments where tight tolerances are required. The combo drill reamer format reduces cycle time by combining two operations into one pass. Right-hand cutting direction makes it compatible with conventional spindle rotation. Machinists and toolroom technicians working on close-tolerance bore requirements in ferrous and non-ferrous materials will find this tool applicable to production and maintenance machining alike.

Key Features

• Solid carbide construction for rigidity and wear resistance in precision boring applications
• Bright uncoated finish suitable for use with a wide range of cutting fluids and materials
• Combined drill-and-ream geometry reduces tool changes and cycle time
• Right-hand cutting direction for standard CNC and manual spindle setups
• Cylindrical shank for compatibility with common collet and toolholder systems
• 1.974-inch flute length provides adequate chip evacuation for typical hole depths

Compatibility

Designed as an OEM-style replacement or direct-fit combo drill reamer for machining setups requiring a 0.201-inch finished hole diameter with a cylindrical shank toolholder.

Installation Notes

Installation and use should be performed by qualified machinists or toolroom technicians. Ensure the spindle is fully stopped and the machine is powered down before changing or seating the tool in the holder. Verify shank seating depth and runout with a dial indicator before cutting to maintain hole tolerance. Use appropriate cutting fluid for the workpiece material and observe the tool manufacturer's recommended feed and speed guidelines for solid carbide reamers.