Hertel 2410272 Chucking Reamer 27/64 in Hss 6 Flute

Product Description

The HERTEL 2410272 is a straight-shank chucking reamer designed for precision hole finishing in machine shop and production environments. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers accurate sizing of drilled or bored holes to a final diameter of 27/64 inch (0.4219 inch decimal). The 6-flute, left-hand spiral geometry with right-hand cutting action reduces chatter and improves surface finish in through-hole and blind-hole applications. Overall length is 7 inches with a 1-3/4 inch flute length. This reamer is installed by machinists and tool-and-die professionals using standard drill press, CNC, or lathe setups.

This reamer is suited for ferrous and non-ferrous materials in general-purpose machining operations. It is commonly used in job shops, maintenance and repair facilities, and production lines where repeatable hole geometry is required. The straight-cylindrical shank is compatible with standard collet chucks, drill chucks, and machine tool holders, making it easy to integrate into existing setups without special tooling.

Key Features

• 27/64 inch (0.4219 inch) finished hole diameter for precise sizing
• High-speed steel (HSS) construction for durability across a range of workpiece materials
• 6-flute, left-hand spiral design reduces chatter and promotes smooth chip evacuation
• Right-hand cutting direction for standard machine rotation
• Bright, uncoated finish — no coating to interfere with close-tolerance fits
• Straight-cylindrical shank fits standard drill chucks and collet holders

Compatibility

Designed as a general-purpose chucking reamer for use in drill presses, lathes, CNC machining centers, and similar machine tools equipped with straight-shank toolholders or collet chucks accepting a straight-cylindrical shank.

Installation Notes

Chucking reamers should be installed by qualified machinists following standard toolholding procedures. Ensure the machine spindle is fully stopped and locked out before changing tooling. Use a correctly sized collet or drill chuck to secure the straight shank with minimal runout, as excessive runout will degrade hole accuracy and tool life. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish quality.