Hertel 2557320 Chucking Reamer 0.3135 in Hss 6 Flute

Product Description

The HERTEL 2557320 is a high-speed steel (HSS) chucking reamer designed for precision hole finishing in metal fabrication and machining applications. With a 0.3135-inch diameter and a bright, uncoated finish, this reamer delivers accurate, smooth bores in a wide range of ferrous and non-ferrous materials. The straight-cylindrical shank is sized for standard chucks on drill presses, lathes, and CNC machining centers. Machinists and tool-and-die professionals rely on this style of reamer to bring drilled holes to tight dimensional tolerances. The 6-inch overall length and 6-flute configuration provide stability and finish quality during the reaming pass.

This chucking reamer is suited for production and maintenance machining environments where precise hole sizing is required. The 1.5-inch flute length handles typical stock-removal passes in through-holes and shallow blind holes. Right-hand cutting direction makes it compatible with standard spindle rotation on most machine tools. The over-under size designation confirms this reamer is ground to a specific finished-hole tolerance rather than a nominal size, making it appropriate where close-tolerance fits are specified on engineering drawings.

Key Features

• 0.3135-inch diameter ground for close-tolerance hole finishing
• HSS construction provides good wear resistance across common workpiece materials
• 6 straight flutes deliver consistent finish and chip clearance
• Bright, uncoated surface finish for general-purpose reaming applications
• Straight-cylindrical shank fits standard drill chucks and collet holders
• Right-hand cutting direction compatible with standard machine spindle rotation

Compatibility

Designed as a standard chucking reamer for use in drill presses, engine lathes, turret lathes, and CNC machining centers equipped with a chuck or collet capable of holding a straight-cylindrical shank tool at the specified diameter range of 0.3000 to 0.3499 inches.

Installation Notes

A qualified machinist should install this reamer in a properly sized chuck or collet and verify runout before use. The workpiece and machine spindle must be secured before engaging the reamer. Use appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish. Follow shop-specific speeds and feeds for HSS reamers in the applicable material; do not reverse spindle rotation while the reamer is engaged in the bore.