Hertel 2329670 Hand Reamer 7/16 in 6 Flutes Hss

Product Description

The HERTEL 2329670 is a spiral-flute hand reamer designed to finish-size drilled holes to precise tolerances. It measures 7/16 inch (0.4375 inch) in diameter with a 2-3/4 inch flute length and a 5-1/2 inch overall length. Constructed from high speed steel with a bright, uncoated finish, this reamer delivers clean, accurate bore finishes in ferrous and non-ferrous workpieces. The left-hand spiral flute geometry combined with right-hand cutting direction pulls chips forward and reduces chatter, making it well suited for hand-driven or low-speed machine finishing operations. Six flutes provide a smooth cutting action and consistent bore geometry on each pass.

This reamer is intended for machinists, tool-and-die makers, and maintenance technicians who need to bring a pre-drilled or rough-bored hole to a finished 7/16 inch dimension. It is commonly used in job shops, maintenance repair operations, and light manufacturing environments where precise hole sizing is required. The straight shank accepts standard drill-press chucks and tap wrenches, making it easy to deploy at a bench or in the field without special tooling.

Key Features

• 7/16 inch (0.4375 inch) finished bore diameter for precise hole sizing
• Spiral flute geometry with left-hand helix reduces chatter and improves chip evacuation
• Right-hand cutting direction compatible with standard clockwise rotation
• High speed steel construction provides wear resistance across a wide range of workpiece materials
• Bright, uncoated finish suitable for use with a variety of cutting fluids
• Six flutes deliver smooth, consistent surface finish through the bore

Compatibility

Designed as a general-purpose hand reamer for finishing holes to a 7/16 inch diameter; fits standard straight-shank drill-press chucks and tap wrenches used in maintenance, fabrication, and machining applications.

Installation Notes

This reamer is installed and operated by machinists or maintenance technicians using a tap wrench, brace, or low-speed drill press. Always secure the workpiece before reaming and apply an appropriate cutting fluid for the material being worked. Do not run a hand reamer at high spindle speeds, as excessive speed accelerates wear and can damage the bore finish. Inspect the reamer for edge condition before use and replace if chipping or dullness is observed.