Hertel 72308349 Chucking Reamer Wire Size 34 Cobalt Steel

Product Description

The HERTEL 72308349 is a straight-flute chucking reamer designed to finish-ream holes to a precise wire size 34 diameter of 0.1110 inches. Built from cobalt steel with a bright uncoated finish, it delivers the hardness and heat resistance needed for production reaming in steel, cast iron, and other ferrous materials. The straight-cylindrical shank seats directly in a drill chuck or collet without special adapters. At 3.5 inches overall length with a 0.875-inch flute, this reamer is suited for through-holes and shallow blind holes in medium-sized workpieces. Licensed machinists and tool-and-die technicians are the primary users.

This chucking reamer fits applications where tight hole-tolerance finishing is required after drilling. Wire size 34 falls in the 0.1000 to 0.1499 inch decimal diameter range, placing it in small-bore work such as dowel-pin prep, guide bushing fitting, and precision assembly holes in mechanical and tooling components. Right-hand cutting direction means it runs with standard spindle rotation on CNC machining centers, knee mills, and drill presses. It is not rated as an over- or under-size reamer, so it is intended to produce nominal wire-size 34 finished holes.

Key Features

• Cobalt steel construction resists heat buildup during high-speed reaming of ferrous and hard materials
• Straight-flute geometry suits through-holes and provides good chip clearance in most materials
• Right-hand cutting direction compatible with standard spindle rotation
• Bright uncoated finish allows direct visual inspection of cutting edges before use
• Straight-cylindrical shank fits standard drill chucks and collet holders without adapters
• Wire size 34 (0.1110 inches) delivers precise small-bore finishing in the 0.1000 to 0.1499 inch range

Compatibility

Designed as an OEM-style replacement or direct-use chucking reamer for any machine tool accepting a straight-cylindrical shank in the wire-size 34 diameter class.

Installation Notes

This tool is installed and used by machinists and tool-and-die professionals on milling machines, drill presses, and CNC machining centers. Always ensure the spindle is fully stopped and the machine is powered down before changing tooling. Secure the shank firmly in a matched collet or drill chuck and verify runout before reaming. Use appropriate cutting fluid for the workpiece material to preserve edge life and maintain hole finish quality.