Hertel 72027659 Chucking Reamer 0.2765 in Hss Straight Flute

Product Description

The HERTEL 72027659 is a high-speed steel (HSS) chucking reamer designed to finish-size drilled or bored holes to precise tolerances. With a nominal diameter of 0.2765 inches and a 6-inch overall length, this reamer provides the extended reach needed for production and jobshop applications. The straight flute geometry and bright uncoated finish make it well-suited for reaming softer materials including aluminum, brass, and mild steel. It is installed by machinists and toolroom technicians operating drill presses, lathes, CNC machining centers, and manual mills.

This chucking reamer is used in general metalworking environments where hole-finishing to close dimensional tolerances is required. The straight-cylindrical shank allows direct chucking in standard drill chucks or collet holders without additional adapters. With a 1.5-inch flute length and right-hand cutting direction, it is appropriate for through-holes and shallow blind holes in light to medium production runs. It is a single-unit tool suited to prototype work, maintenance machining, and repetitive production fixturing alike.

Key Features

• 0.2765-inch reamer diameter for precise hole finishing in the 0.2500 to 0.2999-inch diameter range
• 6-inch overall length provides clearance in deeper workpiece setups
• 6-flute straight configuration delivers smooth cutting action and good chip clearance in soft to medium-hardness materials
• Straight-cylindrical shank for direct mounting in standard drill chucks and collet systems
• Bright uncoated finish on HSS substrate - no coating to chip or flake during re-sharpening
• Right-hand cutting direction, compatible with conventional spindle rotation

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill chucks and collet holders accepting straight-cylindrical shanks across drill presses, lathes, and machining centers.

Installation Notes

Chucking reamers should be installed by qualified machinists following established shop safety procedures. Always power down and lock out the spindle before mounting or removing the tool from the chuck or collet. Use appropriate cutting fluid for the workpiece material to extend tool life and maintain hole-finish quality. Never force a reamer into an undersized hole - pre-drill or bore to within a few thousandths of the finish diameter before reaming.