Hertel 72039852 Chucking Reamer 0.9850 in Hss 8 Flute

Product Description

The HERTEL 72039852 is a high-speed steel (HSS) chucking reamer designed for precision hole finishing in machine tool applications. With a 0.9850-inch diameter and an overall length of 10.5 inches, this reamer delivers accurate, smooth bores in ferrous and non-ferrous metals. The straight flute geometry and bright uncoated finish make it well suited to through-hole reaming operations where chip evacuation and surface finish consistency are the primary requirements. Eight flutes provide a stable cutting action across the full 2.75-inch flute length. The straight-cylindrical shank allows direct mounting in standard machine chucks or collet holders. This tool is intended for installation in drill presses, lathes, machining centers, or turret lathes operated by machinists and toolroom technicians.

The 72039852 is applied in production and toolroom environments where bore tolerance and surface finish must meet close specifications. Typical use cases include finishing drilled or bored holes to a nominal 0.9850-inch diameter in materials such as mild steel, aluminum, brass, and cast iron. The right-hand cutting direction is standard for conventional spindle rotation. The 10.5-inch overall length accommodates deeper reach requirements compared to shorter jobber-style reamers, making it useful in setups where spindle-to-workpiece clearance is limited.

Key Features

• 0.9850-inch finished-bore diameter for close-tolerance hole sizing
• HSS construction provides toughness across a broad range of workpiece materials
• 8 straight flutes deliver consistent surface finish and stable cutting action
• 2.75-inch flute length suited to moderate-depth through-hole applications
• Bright uncoated finish — compatible with a wide range of cutting fluids
• Straight-cylindrical shank for direct chuck or collet mounting
• Right-hand cutting direction for standard spindle rotation

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, machining centers, and turret lathes equipped with chucks or collet holders sized for a straight-cylindrical shank in the 0.9850-inch diameter class.

Installation Notes

Installation and operation should be performed by qualified machinists familiar with rotating cutting tool safety practices. Ensure the machine spindle is fully stopped and locked out before mounting or removing the reamer. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet to minimize runout. Apply an appropriate cutting fluid for the workpiece material to extend tool life and improve surface finish; dry reaming is not recommended for most metals.