Hertel 2350544 Chucking Reamer 27/32 in Hss 8 Flute

Product Description

The HERTEL 2350544 is a chucking reamer designed for precision hole finishing in metal and similar materials. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers accurate sizing in production and maintenance machining environments. The reamer measures 0.8438 inches (27/32 inches) in diameter with an overall length of 9.5 inches and a flute length of 2.5 inches. Eight right-hand spiral flutes promote smooth chip evacuation and consistent surface finish. The straight-cylindrical shank seats securely in standard drill press chucks, CNC collets, and machine tool holders. Machinists and tool-and-die workers reach for this reamer when a drilled hole needs to be brought to a close-tolerance final diameter.

This reamer is suited for through-hole and blind-hole finishing operations on lathes, drill presses, and machining centers. It is a standard-size, non-dowel-pin, non-over-under-size reamer, meaning it cuts to the nominal 27/32-inch diameter without intentional offset. Typical applications include finishing bearing bores, bushing seats, and precision-fit holes in ferrous and non-ferrous workpieces. The HSS construction handles a wide range of cutting speeds and is compatible with most cutting fluids used in general machine shop practice.

Key Features

• 27/32 inch (0.8438 inch decimal) nominal cutting diameter for precise hole sizing
• High-speed steel (HSS) construction provides durability across a broad range of workpiece materials
• 8 right-hand spiral flutes for smooth chip flow and consistent finish quality
• Bright, uncoated finish — suitable for use with standard cutting oils and water-soluble coolants
• Straight-cylindrical shank compatible with standard chucks and collet holders
• Standard nominal size — no over or under offset, no dowel-pin configuration

Compatibility

Designed as a standard chucking reamer for use in drill presses, lathes, and CNC machining centers equipped with chucks or collet systems that accept a straight-cylindrical shank in the 27/32-inch diameter range.

Installation Notes

Chucking reamers are installed by licensed machinists or qualified shop personnel. Secure the straight shank firmly in the chuck or collet before operation and verify runout with a dial indicator before cutting. Always apply appropriate cutting fluid to extend tool life and improve surface finish. Reduce spindle speed relative to drilling — reaming typically runs at 25 to 50 percent of the drilling speed for the same material — and never reverse a reamer in a hole, as this dulls the cutting edges.