Osg 300-0890 Chucking Reamer Size 43 Solid Carbide

Product Description

The OSG 300-0890 is a solid carbide chucking reamer designed for precision hole finishing in general machining applications. Built to wire size 43, it produces a reamed diameter of 0.0890 inches with a tight tolerance of +0.0001 to +0.0004 inches, making it well suited for close-tolerance bore work in metal components. The reamer features a straight flute geometry and a straight cylindrical shank for reliable seating in a chuck or collet. With a 2-inch overall length and a 0.5-inch flute length, it is sized for shallow finishing passes in small-diameter bores. Machinists and tool-and-die professionals install this reamer on CNC machining centers, drill presses, and manual lathes.

This reamer is intended for general machining operations requiring accurate hole sizing in ferrous and non-ferrous materials. Its bright, uncoated solid carbide construction performs well in a range of shop conditions without the added cost of a coated tool. The four-flute configuration provides smooth cutting action and good chip evacuation in short, shallow bores. It is a standard production reamer appropriate for job shops, maintenance departments, and production machining environments where wire-size holes are routinely required.

Key Features

• Solid carbide construction for rigidity and wear resistance in small-diameter reaming
• Wire size 43 diameter — 0.0890 inches — with tolerance of +0.0001 to +0.0004 inches
• Four straight flutes for consistent cutting action and chip clearance
• Straight cylindrical shank for direct chuck or collet mounting
• Bright, uncoated finish suited for general machining without specialty coating requirements
• Right-hand cutting direction, standard for conventional reaming operations

Compatibility

Designed as a standard OEM-style chucking reamer for general machining applications requiring wire size 43 hole finishing. Compatible with any machine spindle or chuck accepting a straight cylindrical shank at this diameter range.

Installation Notes

This reamer is installed by a machinist or tooling technician. Ensure the machine spindle is fully stopped and the tool is firmly seated and secured in the chuck or collet before operation. Use appropriate cutting fluid or coolant directed at the cutting zone to extend tool life and maintain hole quality. Always verify hole pre-drill size before reaming to avoid overloading the flutes.