Hertel MR34-0937.438 Chucking Reamer 3/32 in Solid Carbide

Product Description

The HERTEL MR34-0937.438 is a solid carbide chucking reamer designed for precision hole finishing in metalworking and machining applications. It features a spiral flute geometry with a left-hand spiral direction and right-hand cutting direction, producing a clean, accurate bore on the down-stroke. The reamer measures 0.0938 inches (3/32 inch) in diameter with a total overall length of 1.9685 inches and an 11 mm flute length. With 4 flutes and a bright, uncoated finish, this tool delivers consistent sizing performance in tight-tolerance bores. It is suited for use in CNC machining centers, manual mills, and drill presses where repeatable hole diameter control is required.

This chucking reamer is intended for finish reaming operations in ferrous and non-ferrous metals where precise hole tolerances are critical. The straight cylindrical shank allows direct mounting in standard collet chucks, drill chucks, or machine tool holders. At 3/32 inch diameter, it is well suited for small-bore work in precision components, tooling fixtures, and close-tolerance assemblies. A licensed machinist or CNC operator would typically deploy this tool as a final-pass reamer following a drilled or bored pilot hole.

Key Features

• Solid carbide construction for rigidity and wear resistance in demanding cutting conditions
• Left-hand spiral flute geometry with right-hand cutting direction for clean chip evacuation on the down-stroke
• 4-flute design provides excellent surface finish and accurate hole sizing
• Bright, uncoated finish suitable for general-purpose machining without coating-related dimensional offset
• Diameter tolerance of 0.0000 to +0.0003 mm for tight, consistent hole sizing
• Straight cylindrical shank fits standard collet and drill chuck holders

Compatibility

Designed as an OEM-style chucking reamer for use in CNC machining centers, knee mills, and drill presses equipped with standard straight-shank collet or drill chuck toolholders accepting a 3/32 inch diameter shank.

Installation Notes

Installation and use should be performed by a qualified machinist or CNC operator. Ensure the machine spindle is fully stopped and locked out before mounting or removing the reamer from the toolholder. Always run a pilot hole to the appropriate pre-ream diameter before deploying a chucking reamer to avoid tool deflection or breakage. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain bore finish quality.