Guhring 9045660040000 Spiral Flute Tap M4 X 0.70 Metric

Product Description

The GUHRING 9045660040000 is a spiral flute tap designed for cutting M4 x 0.70 metric internal threads in a range of materials. Built from High Speed Steel-E (HSS-E) and coated with Titanium Nitride (TiN), it delivers elevated wear resistance and extended tool life compared to uncoated taps. The 40-degree helix angle promotes efficient chip evacuation up and out of the hole, making it well-suited for blind-hole tapping applications. With a 3-flute configuration and a 2-3 P chamfer, the tap engages threads gradually and reduces the risk of tap breakage in production environments. Overall length is 4 inches, and it belongs to GUHRING Series 4566.

This tap is used in machining and fabrication operations where precise M4 metric threads are required. It is appropriate for use in CNC machining centers, drill presses, and tapping machines handling ferrous and non-ferrous metals. The right-hand flute and right-hand thread orientation make it a standard choice for conventional metric thread applications. Machinists, tool and die makers, and production operators in manufacturing facilities are the primary users. Coolant-through capability is not available on this model, so conventional flood or manual lubrication should be used during the tapping operation.

Key Features

• M4 x 0.70 metric thread size with right-hand thread and right-hand flute direction
• HSS-E construction provides toughness and resistance to chipping in demanding materials
• TiN coating reduces friction and extends tool life over uncoated HSS taps
• 40-degree helix angle supports chip ejection in blind-hole tapping
• 2-3 P chamfer for gradual thread engagement and reduced tap breakage risk
• Series 4566 design with 4 inches overall length for standard machine tool compatibility

Compatibility

Designed as an OEM-style replacement tap for standard M4 x 0.70 metric tapping applications in production machining and general fabrication environments.

Installation Notes

Installation and use should be performed by qualified machinists familiar with tapping operations and cutting tool safety practices. Before mounting, confirm the tap holder or chuck is clean, properly sized for the 0.168-inch shank diameter, and securely locked. Always apply appropriate cutting fluid or tapping lubricant to the workpiece and tap before operation. Do not reverse-cycle the tap without adequate chip clearance, as chip packing in blind holes is a leading cause of tap breakage.