Alvord Polk 10040 Chucking Reamer 0.048 in Hss Straight Shank

Product Description

The ALVORD POLK 10040 is a straight-shank chucking reamer designed for precision hole finishing in metal fabrication and machining applications. Built from high speed steel with a bright polished finish, it cuts a 0.048-inch diameter hole with a tolerance of +0.0002 to -0.0000 inches, making it suitable where tight dimensional control is required. The reamer measures 2.5 inches in overall length with a 0.5-inch flute length and features four straight flutes with right-hand cutting direction. Machinists and toolroom technicians install this style of reamer in drill presses, lathes, and CNC machining centers to bring drilled holes to final size and finish.

This chucking reamer is suited for small-diameter precision reaming in production and repair environments. The straight shank allows direct mounting in collet chucks or standard drill chucks. At 0.048 inches, this falls in the sub-0.05-inch diameter range, making it a common choice for instrument-grade bores, pin holes, and tight-clearance passages in metalworking, tool and die, and light manufacturing settings. This is a single-piece, individual-unit item intended for professional shop use.

Key Features

• 0.048-inch reamer diameter with a precision tolerance of +0.0002 to -0.0000 inches for consistent hole sizing
• High speed steel construction provides durability across a range of ferrous and non-ferrous materials
• Bright polished finish reduces friction and aids chip evacuation during the reaming pass
• Four straight flutes with right-hand cutting direction for smooth, controlled stock removal
• Straight shank for direct mounting in collet chucks or standard drill chucks
• Compact 2.5-inch overall length suited for close-quarters and bench machine work

Compatibility

Designed as an OEM-style precision cutting tool for use in standard chucking reamer applications requiring a straight shank and 0.048-inch finished hole diameter.

Installation Notes

Chucking reamers are installed and operated by machinists or toolroom technicians using drill presses, lathes, or CNC equipment. Always secure the shank fully in the chuck or collet before operation and confirm the workpiece is properly fixtured. Use appropriate cutting fluid for the material being reamed to extend tool life and maintain surface finish. Never run a reamer in reverse, as this dulls the cutting edges and degrades hole quality.