Walter-prototyp 7557167 Spiral Point Tap 3/4-10 Unc Hss-e

Product Description

The WALTER-PROTOTYP 7557167 is a spiral point tap designed for right-hand through-hole threading in a 3/4-10 UNC configuration. Built from High-Speed Steel-E (HSS-E) and finished with a TiAlN coating, it delivers elevated heat resistance and extended tool life in demanding production environments. The plug chamfer geometry distributes cutting load across the leading threads, making it well suited for through-hole applications where chips are pushed forward and cleared ahead of the tap. With 4 flutes, a 4.921-inch overall length, and a 1.181-inch thread length, this tap is sized for general industrial and precision machining work. It carries a 2B class of fit, which is the standard tolerance for most commercial threaded fastener assemblies.

This tap is intended for through-hole threading operations in materials including steel, stainless steel, cast iron, and non-ferrous metals. It is used in CNC machining centers, drill presses, and manual tapping setups where a plug chamfer entry and forward chip ejection are appropriate for the workpiece and fixturing. The TC217 series is engineered for production-volume threading where coating durability and dimensional consistency across the run matter. Machinists, tool and die makers, and CNC operators working in job shops or manufacturing facilities are the primary users of this tap.

Key Features

• TiAlN coating improves heat resistance and extends tool life in steel and stainless steel applications
• HSS-E substrate provides toughness and wear resistance beyond standard HSS
• Plug chamfer entry pushes chips forward, ideal for through-hole threading
• 4-flute design balances chip clearance and thread form stability
• 2B class of fit meets standard commercial threading tolerances
• No coolant-through requirement simplifies setup in conventional machine environments

Compatibility

Designed for through-hole threading in steel, stainless steel, cast iron, and non-ferrous metals. Suitable for use in standard 3/4-10 UNC threaded assemblies requiring a 2B class of fit tolerance.

Installation Notes

This tap should be installed by a qualified machinist following standard tapping procedures. Ensure the workpiece is securely fixtured and the spindle is aligned with the hole before engaging the tap. Apply appropriate cutting fluid for the workpiece material even though coolant-through is not required; dry tapping in steel or stainless steel will accelerate wear. Follow shop safety protocols and machine manufacturer guidelines when setting spindle speed and feed rate for the tap diameter and material.