Hertel 79890075 Chucking Reamer 0.44 in Solid Carbide

Product Description

The HERTEL 79890075 is a solid carbide chucking reamer designed to finish-size drilled or bored holes to a precise, consistent diameter. Built from solid carbide, it delivers the rigidity and edge retention needed for accurate hole sizing in ferrous and non-ferrous materials. The 0.44 inch diameter reamer holds a tight tolerance of 0.0000 to 0.0003 inches over nominal, making it suitable for applications where fit and finish are critical. At 4 inches overall length with a 1-3/8 inch flute length, this tool fits standard drill press and CNC machining center setups. Machinists and toolroom operators rely on this style of reamer for production and maintenance work requiring repeatable hole geometry.

This reamer is intended for machine-tool use in shop environments where close-tolerance hole finishing is required. The straight cylindrical shank accepts standard chucks and collets on drill presses, lathes, and machining centers. The 6-flute, straight-flute geometry suits through-hole and short blind-hole reaming in a range of workpiece materials. It is sold individually and is appropriate for both production runs and job-shop applications where dimensional accuracy of the finished bore is a primary concern.

Key Features

• Solid carbide construction for superior hardness and edge retention compared to high-speed steel
• 0.44 inch nominal diameter with a tolerance of 0.0000 to 0.0003 inches over nominal
• 6-flute straight-flute design for consistent stock removal and smooth bore finish
• Bright uncoated finish — ready to use as supplied, no additional prep required
• Straight cylindrical shank for direct chuck or collet mounting
• Right-hand cutting direction; compatible with standard machine spindle rotation

Compatibility

Designed as a machine chucking reamer for use in drill presses, lathes, and CNC machining centers equipped with a chuck or collet capable of accepting a straight cylindrical shank. Suitable for finish-reaming 0.44 inch diameter holes where tight dimensional tolerances are required.

Installation Notes

Installation and operation should be performed by a qualified machinist or toolroom technician. Ensure the machine spindle is fully stopped and the tool is securely clamped in the chuck or collet before starting the cut. Use appropriate cutting fluid for the workpiece material to extend tool life and improve bore finish. Inspect the reamer for edge chipping before each use — carbide tooling is brittle and should not be used if the cutting edges show damage.