Hertel 2291540 Chucking Reamer Size 54 Hss 4 Flute

Product Description

The HERTEL 2291540 is a high-speed steel (HSS) chucking reamer designed to finish-ream wire-gauge size 54 holes to a precise 0.0550-inch diameter. With a straight-cylindrical shank and four straight flutes, it mounts directly in a drill chuck or collet and cuts in a right-hand direction. Overall length is 2.5 inches with a 0.5-inch flute length. The bright, uncoated finish is standard for general-purpose HSS reamers and holds up well in ferrous and non-ferrous materials. Machinists and toolroom technicians use this reamer to bring drilled or punched holes to finished tolerance in production and maintenance machining environments.

This reamer is suited for light finishing cuts in small-diameter holes in the 0.0500 to 0.0999 inch diameter range, specifically targeting the wire size 54 (0.0550 inch) nominal dimension. Typical applications include precision hole finishing in fixtures, dies, and small mechanical assemblies where close tolerances are required. It is used on drill presses, CNC machining centers, lathes, and manual mills with appropriate chuck tooling.

Key Features

• Wire size 54 diameter — 0.0550 inches finished hole size
• High-speed steel (HSS) construction for general-purpose cutting performance
• Four straight flutes for smooth, accurate material removal
• Right-hand cutting direction, straight-cylindrical shank for standard chuck compatibility
• Bright, uncoated finish — ready for immediate use in most common work materials
• Compact 2.5-inch OAL with 0.5-inch flute length suited for shallow finishing operations

Compatibility

Designed as a standard chucking reamer for use in any drill press, CNC machining center, lathe, or milling machine equipped with a chuck or collet capable of holding a straight-cylindrical shank in the appropriate diameter range.

Installation Notes

Installation should be performed by a qualified machinist or toolroom technician. Always power down and lock out the machine before seating or removing the reamer from the chuck or collet. Use cutting fluid appropriate to the work material to extend tool life and improve surface finish. Reamers remove only a small amount of material — ensure the drilled or bored hole is within the recommended pre-ream allowance before use.