Hertel K020139AS Spiral Point Tap M4.5x0.75 Metric Coarse

Product Description

The HERTEL K020139AS is a spiral point tap designed for cutting M4.5 x 0.75 metric coarse threads in through-hole applications. Manufactured from high speed steel with a bright finish, it features a plug chamfer for standard starting in pre-drilled holes and a right-hand thread direction. With 2 flutes and a D2 thread limit, this tap pushes chips forward ahead of the cutting edge, making it well suited for threading ductile materials where chip evacuation is a priority. The shank diameter measures 0.194 inches and the thread length is 0.875 inches.

This tap is used in machine shop, production, and maintenance-repair-overhaul environments where M4.5 x 0.75 metric coarse threads are required. It is appropriate for use in drilling machines, CNC machining centers, and tapping heads. The plug chamfer style makes it a practical choice for through-hole threading operations in ferrous and non-ferrous metals. Coolant-through capability is not supported on this tap, so external or flood coolant should be applied at the cutting zone when machine tapping at higher speeds.

Key Features

• Spiral point geometry pushes chips forward for clear chip evacuation in through-hole threading
• M4.5 x 0.75 metric coarse thread form with right-hand thread direction
• High speed steel construction provides wear resistance across a range of workpiece materials
• Bright finish with D2 thread limit for standard tolerance threading
• Plug chamfer for reliable starting in pre-drilled through holes
• 2-flute design suited for moderate chip volume and balanced cutting forces

Compatibility

Designed as a metric coarse spiral point tap for through-hole threading applications requiring an M4.5 x 0.75 thread form in machine tapping or hand tapping operations.

Installation Notes

This tap should be installed and operated by a qualified machinist or tooling technician. Ensure the workpiece is securely fixtured and the tap is properly aligned with the pre-drilled hole before beginning the threading operation. Apply appropriate cutting fluid or flood coolant to the cutting zone to extend tool life and maintain thread quality. Do not force or over-torque the tap; back off periodically when hand tapping to break chips and prevent tap breakage.