Hertel MR34-0472.406 Chucking Reamer 1.2mm Solid Carbide

Product Description

The HERTEL MR34-0472.406 is a solid carbide chucking reamer designed for precision hole finishing in close-tolerance machining applications. With a 1.2 mm reamer diameter and a diameter tolerance of 0.0000 to +0.0003 mm, this tool delivers consistent, accurate bore sizing in materials that demand tight dimensional control. The spiral flute geometry with a left-hand spiral direction promotes smooth chip evacuation, while the right-hand cutting direction suits standard machine spindle rotation. At 50 mm overall length with a 10 mm flute length, it is a compact tool suited for CNC machining centers, manual mills, and drill presses. Machinists and tool-and-die professionals specify this reamer for finishing pre-drilled or bored holes to precise final diameter.

This chucking reamer is intended for use in production machining, toolroom operations, and precision metalworking environments where final hole quality and diameter accuracy are critical. The straight shank allows direct mounting in standard collet chucks, drill chucks, and machine tool holders commonly found in vertical and horizontal machining centers. The bright polished finish reduces friction and helps maintain dimensional accuracy across repeated use cycles. It is appropriate for ferrous and non-ferrous materials where tight bore tolerances are required.

Key Features

• 1.2 mm reamer diameter with a tight tolerance of 0.0000 to +0.0003 mm for precise hole finishing
• Solid carbide construction provides wear resistance and rigidity at small diameters
• Left-hand spiral flutes with right-hand cut promote efficient chip flow during through-hole and blind-hole operations
• Bright polished coating reduces built-up edge and surface friction
• Straight shank compatible with standard collet and drill chuck toolholding systems
• 4-flute design balances chip load distribution and surface finish quality

Compatibility

Designed as an OEM-style precision chucking reamer for use in standard straight-shank collet chucks and drill chucks on CNC machining centers, manual knee mills, and drill presses requiring a 1.2 mm finishing reamer.

Installation Notes

Installation and use of this tool should be performed by a qualified machinist familiar with small-diameter carbide tooling. Ensure the machine spindle is fully stopped and locked out before mounting or removing the reamer from the toolholder. Use appropriate collet or chuck sizes to ensure concentric runout is minimized, as excessive runout will damage carbide at this diameter. Carbide reamers are brittle and should not be used to remove large amounts of stock; pre-drill or bore holes to within recommended finishing allowance before reaming.