Hertel K027735AS25 Spiral Point Tap M4.5x0.75 Metric Coarse

Product Description

The HERTEL K027735AS25 is a spiral point tap designed for cutting M4.5x0.75 metric coarse threads in through-hole applications. Built from high-speed steel (HSS) with a titanium nitride (TiN) coating, this tap delivers improved wear resistance and reduced friction compared to uncoated tooling. The plug chamfer style provides a gradual thread lead-in, making it well suited for through-hole tapping where chip evacuation is straightforward. With 2 flutes and a right-hand thread direction, the tool pushes chips forward ahead of the cutting edge. The D4 thread limit designation indicates a controlled tolerance class appropriate for standard metric fastener fits. Licensed machinists, tool-and-die workers, and precision fabricators are the primary users.

This tap is intended for metric threaded hole production in ferrous and non-ferrous materials where M4.5x0.75 threading is specified. The spiral point geometry makes it most effective in through-hole setups on CNC machining centers, drill presses, or tapping machines. The TiN coating extends tool life in production environments and reduces galling when working with softer metals. The 7/8 inch thread length accommodates typical workpiece thicknesses for this thread size, and the 0.194 inch shank diameter fits standard collet and tap holder tooling.

Key Features

• M4.5x0.75 metric coarse thread form for standard metric fastener compatibility
• TiN coating increases surface hardness and extends service life versus bare HSS
• Plug chamfer lead-in for through-hole tapping operations
• Spiral point geometry pushes chips ahead of the tap to keep the cutting zone clear
• D4 thread limit for controlled tolerance fits
• Right-hand thread direction, no coolant-through feature

Compatibility

Designed as an OEM-style cutting tool for use in standard tap holders, collet chucks, and tapping attachments accepting a 0.194 inch shank diameter.

Installation Notes

Tapping operations should be performed by qualified machinists following applicable shop safety procedures. Ensure the workpiece is securely fixtured and the spindle speed is appropriate for the material and tap diameter before starting the cut. Cutting fluid or tapping compound is recommended even though this tap does not feature coolant-through capability. Inspect the tap for wear or chipping before each use and replace when thread quality degrades.