Hertel 72004906 Chucking Reamer 0.049 in Hss 4 Flute

Product Description

The HERTEL 72004906 is a straight-flute chucking reamer designed for precision hole finishing in metalworking applications. Ground to 0.0490 inches in diameter with a 2.5-inch overall length and a 0.5-inch flute length, this reamer is built to bring drilled or bored holes to a tight, accurate final diameter. Constructed from high-speed steel (HSS) with a bright, uncoated finish, it delivers reliable cutting performance in ferrous and non-ferrous materials. The straight-cylindrical shank seats securely in standard drill chucks or collet holders. With 4 right-hand flutes and a right-hand cutting direction, it produces clean, consistent finishes in through and blind hole applications.

This chucking reamer is suited for machine shop, toolroom, and production floor use where small-diameter hole accuracy is critical. It fits standard CNC machining centers, drill presses, and manual lathes equipped with a compatible chuck or collet. The 0.0490-inch diameter falls within the sub-1/16-inch range, making it appropriate for precision instrument components, small fastener clearance holes, and tight-tolerance fixture work. Machinists, tool-and-die makers, and production machine operators are the primary users.

Key Features

• 0.0490-inch reamer diameter for sub-1/16-inch precision hole finishing
• HSS construction provides toughness across a wide range of workpiece materials
• Bright, uncoated finish suitable for general-purpose dry or lubricated cutting
• 4 straight flutes with right-hand cutting direction for smooth, consistent material removal
• Straight-cylindrical shank for direct chuck or collet clamping without adapters
• 2.5-inch overall length with 0.5-inch flute length sized for shallow-to-moderate depth holes

Compatibility

Designed as an OEM-style chucking reamer for use in any machine tool accepting a straight-cylindrical shank with a compatible bore diameter.

Installation Notes

This reamer is intended for use by machinists and tool-and-die professionals on machine tools such as drill presses, lathes, or CNC machining centers. Ensure the workpiece is securely fixtured and the spindle is fully stopped before loading or removing the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Do not exceed the reamer diameter when selecting the pre-drill size — the pilot hole should be undersized per standard reaming allowance practice.