Hertel 2410215 Chucking Reamer 21/64 in Hss 6 Flute

Product Description

The HERTEL 2410215 is a 6-flute high-speed steel (HSS) chucking reamer designed to bring bored or drilled holes to a precise finished diameter. With a nominal diameter of 21/64 inches (0.3281 decimal inches), this reamer delivers accurate sizing and a smooth bore finish in a single pass. The left-hand spiral flute geometry helps clear chips away from the cutting zone while the right-hand cutting direction keeps the tool tracking true. The bright, uncoated finish suits general-purpose work across a wide range of steels and non-ferrous metals. Machinists and tool-room professionals install this tool in lathe chucks, drill presses, and machining centers for finishing operations where hole tolerance and surface quality are critical.

This reamer is suited to manual and CNC machining environments requiring close-tolerance hole finishing. The straight-cylindrical shank allows secure clamping in standard chucks or collets without slippage under typical reaming feed loads. At 6 inches overall length with a 1-1/2 inch flute length, it fits standard tooling setups for through-holes and moderate blind-hole depths in production and maintenance machining applications.

Key Features

• 21/64 inch (0.3281 inch) nominal diameter for precise hole sizing within the 0.3000 to 0.3499 inch range
• 6-flute design distributes cutting load and improves surface finish
• Left-hand spiral flutes promote chip evacuation during right-hand cutting
• High-speed steel (HSS) construction provides toughness and wear resistance across common workpiece materials
• Bright, uncoated finish — ready to use as-ground or receptive to field reconditioning
• Straight-cylindrical shank for direct chuck or collet mounting with no adapter required

Compatibility

Designed as a standard chucking reamer for use in lathe chucks, drill press chucks, and CNC machining center collet systems accepting a straight-cylindrical shank in the 21/64 inch diameter class.

Installation Notes

Chucking reamers are installed by qualified machinists following standard shop safety procedures — ensure the machine is fully stopped and de-energized before changing tooling. Secure the straight-cylindrical shank firmly in a properly sized chuck or collet to prevent runout, which directly affects hole tolerance. Apply appropriate cutting fluid for the workpiece material to extend tool life and maintain surface finish quality. Always confirm spindle speed and feed rate are set to values appropriate for HSS tooling and the material being reamed before starting the cut.