M.a. Ford. 27248440 Chucking Reamer 31/64 in Solid Carbide

Product Description

The M.A. FORD. 27248440 is a solid carbide chucking reamer designed for precision hole finishing in machine shop and production environments. With a nominal diameter of 31/64 inches (0.4844 inches decimal) and a tight tolerance of +0.0001/+0.0004 inches, this reamer delivers accurate, repeatable bore sizing on ferrous and non-ferrous materials. The six-flute, straight-flute geometry provides smooth cutting action and consistent surface finish. At 4 inches overall length with a 1.5-inch flute length, it is sized for standard machine tool setups. A straight shank allows direct chucking in drill chucks, collets, or floating reamer holders. Licensed machinists, toolroom technicians, and CNC operators are the primary installers of this tooling.

This chucking reamer is suited for through-hole and blind-hole reaming operations in machining centers, drill presses, lathes, and manual mills. Its right-hand cutting direction and straight flutes make it appropriate for general-purpose reaming where chip evacuation from the front of the hole is acceptable. The uncoated solid carbide construction performs well in cast iron, aluminum, brass, and other materials where carbide hardness and rigidity are advantageous over high-speed steel alternatives. It is sold individually and intended for use in both job shop and production floor applications requiring close-tolerance hole finishing.

Key Features

• Solid carbide construction for rigidity and long tool life in abrasive materials
• Six straight flutes with right-hand cut for smooth, consistent bore finishing
• Diameter tolerance of +0.0001/+0.0004 inches for precise hole sizing
• Straight shank compatible with standard drill chucks, collets, and floating holders
• Uncoated finish suitable for a broad range of workpiece materials
• No coolant-through requirement simplifies setup on standard machine tools

Compatibility

Designed as an OEM-style replacement or direct tooling selection for machine tools accepting a straight-shank chucking reamer in the 31/64-inch diameter range, including drill presses, machining centers, lathes, and manual milling machines equipped with standard drill chucks or collet systems.

Installation Notes

This reamer is installed by machinists or toolroom personnel following standard machine tool lockout and spindle-stop procedures before changing tooling. Secure the straight shank firmly in a properly sized collet or drill chuck to minimize runout, which directly affects reamed hole accuracy. Follow the reamer manufacturer and machine tool guidelines for appropriate feed rates and cutting speeds for the specific workpiece material. Solid carbide tooling is brittle and should not be used to remove excessive stock — pre-drill or bore the hole to within 0.005 to 0.015 inches of final diameter before reaming, referencing shop practice standards for allowance.