Hertel 72292196 Chucking Reamer Letter S Hss 6 Flute

Product Description

The HERTEL 72292196 is a straight-flute chucking reamer designed to finish-ream holes to a precise Letter S diameter of 0.3480 inches. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers consistent dimensional accuracy in metalworking applications. The straight-cylindrical shank mounts directly in a drill chuck or collet holder without modification. With 6 flutes and a right-hand cutting direction, this reamer produces smooth, tight-tolerance bores in a single pass. Overall length is 4-7/8 inches with a 1-3/4 inch flute length, making it suited for short-to-medium depth holes in production and maintenance machining environments.

This reamer is used in machine shop, toolroom, and maintenance repair operations where hole size must meet close-tolerance fit requirements. It is appropriate for use in drill presses, lathes, and CNC machining centers with a compatible straight-shank chuck or collet. Typical applications include reaming clearance holes, bearing seats, and pin-fit bores in ferrous and non-ferrous materials. Machinists and tool-and-die technicians are the primary users of this type of reamer.

Key Features

• Letter S diameter (0.3480 inches) for precise hole sizing within the 0.3000 to 0.3499 inch range
• High-speed steel (HSS) construction for durability across ferrous and non-ferrous materials
• 6 straight flutes with right-hand cutting direction for smooth, accurate bore finishing
• Straight-cylindrical shank for direct chuck or collet mounting without adapters
• Bright, uncoated finish — no coating buildup to affect dimensional tolerance
• Compact 4-7/8 inch OAL suits standard drill press and lathe setups

Compatibility

Designed as an OEM-style replacement or standard toolroom chucking reamer for use in any drill press, lathe, or machining center equipped with a straight-shank chuck or collet sized to accept a 0.3480-inch shank tool.

Installation Notes

A licensed machinist or trained toolroom technician should install and operate this reamer. Ensure the machine spindle is fully stopped and the workpiece is securely fixtured before mounting the tool. Use appropriate cutting fluid for the workpiece material to extend tool life and improve finish quality. Do not exceed the recommended feed rate for HSS reamers in hard or abrasive materials, as overfeeding will cause premature edge wear.