Hertel 72293301 Chucking Reamer 0.2490 in Hss 6 Flute

Product Description

The HERTEL 72293301 is a straight-flute chucking reamer designed for precision hole finishing in metal and alloy workpieces. Built from high-speed steel (HSS) with a bright, uncoated finish, this reamer delivers accurate sizing in drilling and boring applications where hole tolerance is critical. The 0.2490-inch cutting diameter places it in the 0.2000 to 0.2499 inch range, making it an over- or under-size option suited for controlled fit work. With a 4-inch overall length and a 1.5-inch flute length, the tool balances reach and chip clearance for typical machine-shop and maintenance operations. It is installed by machinists, tool-and-die professionals, and maintenance technicians working on manual mills, drill presses, and CNC equipment.

This chucking reamer is suited for light-to-medium stock removal in ferrous and non-ferrous materials where a finished bore diameter near 0.2490 inches is required. The straight-cylindrical shank mounts directly in standard drill chucks, collet holders, and floating reamer holders without additional adapters. Right-hand cutting direction is consistent with conventional spindle rotation. Typical applications include bearing seat preparation, dowel hole finishing, and precision fixture work in job shop and production environments.

Key Features

• HSS construction provides adequate hardness and toughness for general-purpose reaming in steel, cast iron, and aluminum
• Straight-flute geometry simplifies regrinding and suits through-hole applications
• Bright, uncoated finish allows direct inspection of flute condition and cutting edge integrity
• Over- or under-size designation supports precise bore adjustment beyond nominal drill sizing
• Straight-cylindrical shank is compatible with standard drill chucks and collet systems
• 6-flute configuration improves surface finish and distributes cutting load evenly around the bore

Compatibility

Designed as an OEM-style replacement or direct-use chucking reamer for machine setups requiring a 0.2490-inch finished bore diameter with a straight-cylindrical shank interface.

Installation Notes

Chucking reamers are installed by machinists and maintenance technicians on powered equipment such as drill presses, mills, or CNC machining centers. Always secure the workpiece fully before reaming and confirm spindle speed and feed rate are appropriate for the material and tool diameter. Use cutting fluid to extend tool life and improve bore finish. Inspect cutting edges for wear or chipping before each use; a dull reamer produces oversized, rough bores and should be reground or replaced.