Osg 300-1299 Chucking Reamer 3.3mm Solid Carbide

Product Description

The OSG 300-1299 is a solid carbide chucking reamer designed to finish-ream drilled holes to a precise diameter. With a 3.3 mm (0.1299 inch) cutting diameter and a diameter tolerance of +0.0001 to +0.0004 inches, it produces close-tolerance bores suitable for dowel pin fits, bearing seats, and precision assemblies. The four-flute straight design provides smooth chip evacuation in short-chipping materials. At 64 mm overall length with a 19 mm flute length, it is sized for benchtop machining centers and CNC drill-tap machines. This reamer is part of OSG Series 300D, intended for general machining applications across a range of industries.

The 300-1299 is suited for finishing operations in ferrous and non-ferrous materials where hole finish and dimensional accuracy are critical. The bright, uncoated solid carbide construction makes it appropriate for use in aluminum, brass, cast iron, and mild steel. It is installed via a straight cylindrical shank into a collet chuck or drill chuck on a milling machine, machining center, or dedicated reaming fixture. Cutting direction is right-hand. This tool does not require through-coolant capability and is not configured as a dowel pin or over/under-size reamer.

Key Features

• 3.3 mm (0.1299 inch) diameter with a tight tolerance of +0.0001 to +0.0004 inches for precision bore finishing
• Solid carbide construction for rigidity and wear resistance in general machining
• Four straight flutes with right-hand cutting direction for smooth, chatter-free reaming
• Bright uncoated finish suitable for a broad range of workpiece materials
• Straight cylindrical shank for standard collet or drill chuck mounting
• Compact 64 mm overall length fits tight-clearance setups

Compatibility

Designed as an OEM-style general-purpose chucking reamer for use in CNC machining centers, drill presses, and manual mills equipped with a collet or drill chuck capable of holding a straight cylindrical shank.

Installation Notes

A licensed machinist or qualified toolroom technician should secure this reamer in a precision collet or drill chuck, ensuring the shank is fully seated and runout is minimized before operation. Spindle speed and feed rate should be set according to the workpiece material and machine manufacturer guidelines — do not exceed the recommended cutting parameters for solid carbide tooling. Power down and lock out the machine spindle before changing or inspecting the reamer. Inspect the cutting edges for chipping before each use; carbide tooling is brittle and should not be dropped or subjected to side impact.