Hertel 72292253 Chucking Reamer Letter Y Hss 6 Flute

Product Description

The HERTEL 72292253 is a high-speed steel (HSS) chucking reamer sized to Letter Y, producing a finished bore diameter of 0.4040 inches. It features six straight flutes ground for right-hand cutting and a straight-cylindrical shank that seats directly in standard drill chucks or collet holders on a lathe, drill press, or machining center. Overall length is 5.25 inches with a flute length of 1.75 inches. The bright, uncoated finish is suited for general-purpose reaming in a range of ferrous and non-ferrous materials. Machinists and toolroom technicians reach for this style when finishing drilled or bored holes to close diameter tolerance.

This reamer is used in machine shop and production environments where a Letter Y hole size is required to close tolerance. Typical applications include bearing fits, dowel pin bores, and bushing installations where surface finish and dimensional accuracy matter. The straight-cylindrical shank makes it compatible with standard chucking setups without the need for a taper adapter, keeping setup time low in both job-shop and production settings.

Key Features

• Letter Y diameter — 0.4040 inches finished bore size
• Six straight flutes for right-hand cutting action
• HSS construction provides good toughness across a broad range of workpiece materials
• Straight-cylindrical shank fits standard drill chucks and collet holders directly
• Bright/uncoated finish — compatible with cutting fluids of choice without coating limitations
• 5.25-inch overall length with 1.75-inch flute length for controlled chip evacuation in through and blind holes

Compatibility

Designed for use in any machine tool equipped with a standard drill chuck or straight-shank collet capable of holding a straight-cylindrical shank in the Letter Y diameter range (0.4000 to 0.4999 inches).

Installation Notes

Chucking reamers are installed and operated by machinists on lathes, drill presses, or CNC machining centers. Ensure the workpiece and machine spindle are fully secured before engaging the reamer. Use an appropriate cutting fluid for the workpiece material to extend tool life and achieve the desired surface finish. Never rotate a reamer in reverse, as this dulls the cutting edges rapidly.