Hertel 8272387 Chucking Reamer 0.3475 in Hss 6 Flute

Product Description

The HERTEL 8272387 is a straight-flute chucking reamer designed for precision hole finishing in metal machining applications. Built from high-speed steel (HSS) with a bright, uncoated finish, this reamer delivers consistent bore sizing in a wide range of ferrous and non-ferrous materials. It features a 0.3475-inch diameter, six flutes, and a straight-cylindrical shank for secure chuck retention. With a 6-inch overall length and a 1.5-inch flute length, it is sized for bench-top lathes, drill presses, and CNC turning centers. Right-hand cutting direction is standard. This tool is typically installed and operated by machinists and tool-and-die professionals working to close dimensional tolerances.

This chucking reamer is suited for production and maintenance machining environments requiring repeatable bore finishing. The 0.3475-inch nominal diameter places it within the 0.3000 to 0.3499 inch reamer diameter range, making it appropriate for sizing holes to near-finished or finished bore specifications. It is commonly used in job shops, manufacturing facilities, and maintenance repair operations where HSS tooling is preferred for its toughness and regrindability.

Key Features

• 0.3475-inch cutting diameter for precision bore finishing
• Six straight flutes for smooth, consistent stock removal
• High-speed steel (HSS) construction for durability and regrindability
• Bright, uncoated finish — no coating buildup affecting dimensional accuracy
• Straight-cylindrical shank compatible with standard drill chucks and collets
• Right-hand cutting direction, standard for most machine setups

Compatibility

Designed as an OEM-style chucking reamer for use in standard drill chucks and collet systems accepting a straight-cylindrical shank. Fits typical lathe tailstock, drill press, and CNC spindle setups used with HSS reaming tooling.

Installation Notes

Chucking reamers are installed and operated by qualified machinists. Secure the shank firmly in the chuck or collet before operation and verify runout before engaging the workpiece. Always reduce spindle speed significantly compared to drilling — reaming typically requires one-third to one-half of the drilling speed for the material. Power down and lock out the machine before changing or inspecting tooling.