Hertel MR34-0401.281 Chucking Reamer No. 60 Solid Carbide

Product Description

The HERTEL MR34-0401.281 is a solid carbide chucking reamer designed for precision hole finishing in metalworking applications. Built to a No. 60 wire gauge diameter of 0.0400 inches, it features a spiral flute geometry with left-hand spiral direction and right-hand cutting action. This combination helps evacuate chips efficiently while reducing chatter during the cut. The bright polished finish minimizes friction and heat buildup. With a 4-flute configuration and a diameter tolerance of 0.0000 to +0.0003 inches, it delivers consistent, repeatable hole quality. Machinists and tool and die professionals use it when tight bore tolerances are required on small-diameter holes.

This reamer is suited for production and job-shop environments where small-diameter hole finishing demands close tolerances. The straight shank allows direct mounting in standard drill chucks, collet chucks, and floating reamer holders on CNC machining centers, lathes, and drill presses. The 7.00 mm flute length makes it appropriate for shallow-to-moderate depth applications in materials where solid carbide provides a rigidity and wear-resistance advantage over high-speed steel alternatives.

Key Features

• No. 60 wire size diameter — 0.0400 inches for precise small-bore finishing
• Solid carbide construction for rigidity and wear resistance in hard or abrasive materials
• 4-flute spiral design with left-hand spiral and right-hand cut for effective chip evacuation
• Bright polished finish reduces friction and aids chip flow
• Diameter tolerance of 0.0000 to +0.0003 inches for consistent hole sizing
• Straight shank compatible with standard chucks and collet systems

Compatibility

Designed as an OEM-style solid carbide chucking reamer for use in standard straight-shank toolholders, drill chucks, and collet chucks on CNC and manual machine tools requiring No. 60 wire gauge bore finishing.

Installation Notes

Installation and use should be performed by a qualified machinist familiar with reaming operations and cutting tool handling. Secure the straight shank fully in the holder and verify runout before cutting. Always reduce spindle speed relative to drilling and use appropriate cutting fluid for the workpiece material. Inspect the cutting edges before each use — solid carbide is brittle and should not be used in setups with excessive vibration or interrupted cuts.