Hertel 72294499 Chucking Reamer No. 49 0.0730 in Hss

Product Description

The HERTEL 72294499 is a No. 49 wire-size chucking reamer designed for precision hole finishing in metal and machined components. Built from high-speed steel (HSS), it delivers consistent sizing and smooth surface finish in through-holes and blind bores at diameters in the 0.0500 to 0.0999 inch range, with a nominal diameter of 0.0730 inches. The 4-flute, right-hand spiral configuration promotes chip evacuation and reduces chatter during the reaming pass. At 2 inches overall length with a 3/4 inch flute length, this reamer is suited for shallow-hole applications where a compact tool is required. It fits standard drill chucks and collet systems via its straight-cylindrical shank.

This reamer is used in machine shop environments, toolroom operations, and production drilling setups where tight hole tolerances are required for dowel pins, press fits, or precision clearance holes. It is well suited for ferrous and non-ferrous metals in light to medium-duty drilling and reaming operations on drill presses, CNC machining centers, lathes, and manual milling machines. The small wire-size diameter makes it a common choice for instrument work, small fixture fabrication, and precision component manufacturing.

Key Features

• No. 49 wire size with 0.0730 inch nominal reaming diameter
• HSS construction for durability across a range of ferrous and non-ferrous workpiece materials
• 4-flute right-hand spiral geometry promotes clean chip removal and smooth bore finish
• Straight-cylindrical shank for direct mounting in drill chucks and collet holders
• Compact 2 inch OAL with 3/4 inch flute length suited to shallow-hole reaming applications

Compatibility

Designed as a standard straight-shank chucking reamer compatible with drill chucks and collet systems accepting straight-cylindrical shanks in the applicable diameter range.

Installation Notes

Chucking reamers are installed by machinists and toolroom technicians using standard drill chucks or collet holders on machine tools. Ensure the workpiece is securely fixtured and the pre-drilled hole is sized appropriately undersized before reaming to achieve the target diameter. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Never use a reamer to remove excessive stock; the reamer is a finishing tool, not a roughing tool.