M.a. Ford 27231200 Chucking Reamer 0.312 in Solid Carbide

Product Description

The M.A. FORD 27231200 is a solid carbide chucking reamer designed for precision hole finishing in machining applications. With a 0.312 inch diameter and a reamer diameter tolerance of +0.0001 to +0.0003 inches, it delivers tight, consistent sizing in finish-reamed bores. The straight flute geometry and right-hand cutting direction make it well suited for through-hole and short blind-hole applications in a variety of workpiece materials. This reamer is part of the Series 272 lineup and is intended for use by machinists and tool-and-die professionals working in production or job-shop environments.

This reamer is used in CNC machining centers, drill presses, and manual mills where a straight shank can be held in a drill chuck or collet. Its 1-1/8 inch flute length accommodates moderate-depth bores, and the 3.25 inch overall length provides adequate reach for most standard workholding setups. Typical applications include finishing pre-drilled or bored holes to H7 or similar close-tolerance fits in ferrous and non-ferrous metals, as well as plastics and composites where dimensional precision is required.

Key Features

• Solid carbide construction for superior hardness, wear resistance, and dimensional stability compared to HSS
• 0.312 inch diameter with +0.0001/+0.0003 inch tolerance for precise bore finishing
• Straight flute geometry provides clean chip evacuation in through-hole reaming
• Right-hand cutting direction compatible with standard spindle rotation
• 6-flute design increases surface contact for improved finish quality and size control
• Uncoated carbide substrate suitable for use with cutting fluid in a range of materials

Compatibility

Designed as a straight-shank chucking reamer for use in drill chucks, ER collet chucks, or similar toolholding systems on CNC machining centers, drill presses, and milling machines capable of holding a straight shank tool of 0.312 inch diameter.

Installation Notes

This tool is installed and serviced by machinists and tooling technicians. Ensure the spindle is fully stopped and the machine is in a safe, locked state before loading or removing the reamer. Secure the straight shank firmly in the chuck or collet to prevent runout, which directly affects bore tolerance and tool life. Always apply an appropriate cutting fluid for the workpiece material; dry reaming with carbide tooling can cause premature edge wear.