Hertel MR34-0681.406 Chucking Reamer 0.0681 in Carbide

Product Description

The HERTEL MR34-0681.406 is a solid carbide chucking reamer designed for precision hole finishing in tight-tolerance applications. With a reamer diameter of 0.0681 inches (1.73 mm) and a bright polished finish, this tool delivers consistent, accurate bore sizing in hardened and abrasive materials. The 4-flute, left-hand spiral geometry paired with right-hand cutting direction provides smooth chip evacuation and a clean finished bore. Overall length is 1.9685 inches with a flute length of 0.7087 inches. Machinists and toolroom professionals use this reamer to bring drilled holes to precise final diameter in production or job-shop environments.

This chucking reamer is suited for use in CNC machining centers, lathes, and drill presses where a straight shank chuck mount is standard. It is appropriate for finishing small-diameter bores in ferrous and non-ferrous metals, plastics, and composites. The solid carbide construction makes it especially effective in harder workpiece materials where high-speed steel tooling would wear prematurely. The bright polished coating reduces friction and aids chip flow, keeping bore finish quality consistent across production runs.

Key Features

• Solid carbide construction for wear resistance in hard and abrasive materials
• 4-flute left-hand spiral geometry with right-hand cutting direction for smooth chip evacuation
• Bright polished finish reduces friction and maintains bore surface quality
• Reamer diameter tolerance of 0.0000 to +0.0003 mm for tight-tolerance bore finishing
• Straight shank for direct chuck mounting on CNC machines, lathes, and drill presses
• Compact overall length of 1.9685 inches suits small-bore, close-clearance applications

Compatibility

Designed as an OEM-style chucking reamer for use in straight-shank chuck holders on CNC machining centers, manual lathes, and drill presses requiring a 0.0681-inch finished bore diameter.

Installation Notes

This reamer should be installed by a qualified machinist familiar with precision hole-finishing procedures. Ensure the workpiece is securely fixtured and the spindle is fully stopped before mounting or removing the tool from the chuck. Always apply appropriate cutting fluid for the workpiece material to extend tool life and maintain bore finish. Do not use this reamer to remove excessive stock; pre-drill or bore the hole to within accepted reaming stock allowance before finishing.