Hertel 72308430 Chucking Reamer Wire Size 43 Cobalt Steel

Product Description

The HERTEL 72308430 is a wire size No. 43 chucking reamer designed for precision hole finishing in metal machining applications. Built from cobalt steel with a bright, uncoated finish, this reamer delivers consistent sizing and surface finish in materials that benefit from the heat resistance cobalt provides. It features a straight-cylindrical shank for use in standard drill chucks or collet holders, four straight flutes, and right-hand cutting direction. The overall length is 3 inches with a flute length of 0.75 inches. The reamed diameter is 0.0890 inches, corresponding to wire gauge size No. 43. Machinists and toolroom technicians are the primary users of this tool.

This chucking reamer is suited for production and toolroom machining operations requiring tight bore tolerances at small diameters. Typical applications include finishing pre-drilled or pre-bored holes in ferrous and non-ferrous metals where a final pass is needed to achieve accurate sizing and finish. The straight-cylindrical shank is compatible with standard drill press and lathe chuck setups, as well as CNC machining center collet systems. It is not configured as a dowel pin reamer or as an over- or under-size reamer.

Key Features

• Wire size No. 43 diameter at 0.0890 inches for precise small-bore finishing
• Cobalt steel construction provides elevated heat resistance compared to standard HSS
• Bright, uncoated finish suitable for general-purpose metal cutting with proper cutting fluid
• Four straight flutes with right-hand cutting direction for standard machine operation
• Straight-cylindrical shank compatible with drill chucks and collet holders
• Compact 3-inch overall length suits short-reach applications and bench machines

Compatibility

Designed as an OEM-style machine reamer for use in drill presses, lathes, and CNC machining centers equipped with chucks or collets accepting a straight-cylindrical shank at the 0.0890-inch diameter range.

Installation Notes

Installation is performed by qualified machinists. Ensure the machine spindle is fully stopped and locked out before mounting or removing the reamer from the chuck or collet. The workpiece bore should be pre-drilled or pre-bored to the correct undersize before reaming. Apply appropriate cutting fluid for the workpiece material to prolong tool life and achieve the target surface finish.