Hertel 8272379 Chucking Reamer 0.3145in Hss Straight Flute

Product Description

The HERTEL 8272379 is a high-speed steel (HSS) chucking reamer designed to finish-ream drilled or bored holes to precise tolerances. With a reamer diameter of 0.3145 inches, an overall length of 6 inches, and a 1.5-inch flute length, this tool delivers accurate sizing in metalworking and machining operations. The bright, uncoated HSS construction handles a wide range of ferrous and non-ferrous workpiece materials without the added cost of a coated tool. Machinists and toolroom technicians install this reamer in drill presses, lathes, and CNC machining centers where hole geometry and surface finish are critical.

This chucking reamer is suited for production and job-shop environments where consistent hole sizing is required. The straight-cylindrical shank mounts directly in standard drill chucks, collet holders, and floating reamer holders. The right-hand cutting direction is compatible with conventional spindle rotation. Typical applications include reaming clearance holes, dowel pin holes, and bearing seats in steel, cast iron, aluminum, and brass components. Both manual-feed and machine-feed operations are supported.

Key Features

• 0.3145-inch reamer diameter for precise hole sizing within the 0.3000-0.3499 inch range
• HSS tool material provides good toughness and wear resistance across common workpiece materials
• Straight-cylindrical shank for direct mounting in drill chucks and collet holders
• 6-flute geometry improves surface finish and distributes cutting load evenly
• Bright, uncoated finish maintains sharp cutting edges and simplifies resharpening
• Right-hand cutting direction suits standard clockwise spindle rotation

Compatibility

Designed as an OEM-style chucking reamer compatible with standard drill chucks, collet holders, and floating reamer holders accepting a straight-cylindrical shank in the 0.3145-inch diameter class.

Installation Notes

Installation and use of chucking reamers should be performed by qualified machinists familiar with proper speeds, feeds, and cutting fluid selection for reaming operations. Always power down and lock out the spindle before mounting or removing the tool from the holder. Secure the shank fully within the chuck or collet to prevent pullout under cutting loads. Avoid using a reamer to remove more material than the tool is rated for — pre-drill or bore the hole to within 0.005-0.015 inches of final size before reaming.