M.a. Ford 27202250 Chucking Reamer No. 74 Solid Carbide

Product Description

The M.A. FORD 27202250 is a solid carbide chucking reamer ground to a No. 74 wire-gauge diameter of 0.0225 inches. It features a four-flute, straight-flute geometry with a right-hand cutting direction and an uncoated finish. The straight shank allows direct mounting in standard chucks and collets on drill presses, CNC machining centers, and manual lathes. At 1.5 inches overall length with a 0.25-inch flute length, this is a compact reamer designed for finishing small-diameter holes to tight tolerances. Reamer diameter tolerance is held to +0.0001 to +0.0003 inches, making it suitable for precision bore finishing in metalworking and mechanical assembly operations.

This reamer is used in applications requiring close-tolerance hole finishing at sub-0.05-inch diameters. Typical scenarios include finishing wire-gauge holes in jigs, fixtures, instrument components, and precision mechanical assemblies where surface finish and dimensional accuracy are critical. The solid carbide construction provides the rigidity needed for consistent results in harder workpiece materials. Machinists, tool-and-die makers, and precision manufacturers will find this reamer appropriate for production and prototype work where small-diameter bore quality must be controlled.

Key Features

• No. 74 wire-size diameter: 0.0225 inches with tolerance of +0.0001 to +0.0003 inches
• Solid carbide construction for rigidity and wear resistance in precision boring
• Four-flute, straight-flute design for consistent chip evacuation in short-flute applications
• Right-hand spiral direction and right-hand cutting direction
• Straight shank for direct chuck or collet mounting without adapters
• Uncoated finish — no coating thickness to account for in tolerance-critical applications

Compatibility

Designed as a standard chucking reamer for use in drill presses, CNC machining centers, manual mills, and lathes equipped with chucks or collets capable of holding a straight shank at sub-0.05-inch tool diameters.

Installation Notes

Chucking reamers in this diameter range are installed by machinists and toolroom professionals. Secure the straight shank firmly in a precision collet or drill chuck before operation to minimize runout at small diameters. Always bring the workpiece to final reaming speed and apply appropriate cutting fluid for the workpiece material. Do not use a reamer to remove excessive stock; pre-drill or bore the hole to within a few thousandths of final size before reaming.