Hertel 72293061 Chucking Reamer 0.1240 in Hss 4 Flute

Product Description

The HERTEL 72293061 is a high-speed steel (HSS) chucking reamer designed for precision hole finishing in metalworking applications. With a 0.1240 inch diameter and a right-hand cutting direction, this reamer delivers accurate, smooth bore finishing in drilled holes. It features 4 straight flutes with a bright, uncoated finish and is classified as an under-size reamer, making it suitable for applications that require tight dimensional tolerances. The straight-cylindrical shank allows for reliable grip in standard chucks and collets. Overall length is 2.75 inches with a 0.875 inch flute length. Machinists and tool-and-die professionals use this reamer for precision finishing work on small-diameter holes.

This reamer is well suited for light-duty precision reaming operations in machine shops, tool rooms, and production environments. Its compact size and under-size designation make it a practical choice for finishing bores where close dimensional control is required. The straight flute geometry works effectively on a range of ferrous and non-ferrous materials. It is compatible with standard drill presses, lathes, CNC machining centers, and manual milling machines equipped with an appropriate chuck or collet setup.

Key Features

• 0.1240 inch diameter with under-size designation for tight-tolerance bore finishing
• 4 straight flutes with right-hand cutting direction
• HSS tool material for durability across ferrous and non-ferrous materials
• Bright, uncoated finish suitable for use with cutting fluids
• Straight-cylindrical shank for secure seating in standard chucks and collets
• Compact overall length of 2.75 inches with 0.875 inch flute length

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, milling machines, and CNC machining centers equipped with a compatible chuck or collet accepting a straight-cylindrical shank.

Installation Notes

Installation and use of this reamer should be performed by qualified machinists or tooling technicians. Always secure the shank fully in a properly sized chuck or collet before operation, and verify spindle runout is within acceptable limits to avoid reamer damage or out-of-tolerance results. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Never force a reamer through a hole smaller than the recommended pre-drilled diameter.