Hertel K008571AS Spiral Point Tap 5/8-18 Unf 3 Flutes

Product Description

The HERTEL K008571AS is a spiral point tap designed for threading through-holes in a wide range of metalworking applications. Built from high speed steel with a bright finish, this tap drives chips forward ahead of the cutting zone, allowing for faster feed rates and cleaner thread formation in production and job-shop environments. It is configured in a plug chamfer style, which distributes cutting load across several leading threads for a balance between starting ease and threading depth. Machinists and tool-and-die technicians are the primary users, and the tap is sized for right-hand 5/8-18 UNF threads.

This tap is suited for through-hole threading operations in ferrous and non-ferrous materials on manual mills, CNC machining centers, and drill presses equipped with tapping heads or tension-compression holders. The 3-flute geometry provides good chip clearance in moderate-length through-holes, making it a practical choice for general production threading where cycle times and thread quality are both priorities. It does not feature coolant-through capability and is intended for conventional flood or manual lubrication setups.

Key Features

• Spiral point geometry pushes chips forward, reducing re-cutting in through-hole applications
• High speed steel construction provides durability across a broad range of workpiece materials
• Plug chamfer distributes cutting load for smooth engagement and controlled thread start
• Right-hand cut, Class 2B thread limit H5 for standard UNF tolerance fits
• Bright finish with no coating for straightforward regrinding when worn
• 3-flute design balances chip evacuation and tool body strength

Compatibility

Designed for cutting right-hand 5/8-18 UNF internal threads in through-hole configurations consistent with Class 2B fit requirements.

Installation Notes

Installation of taps should be performed by a qualified machinist following standard threading procedures. Secure the workpiece firmly before threading and ensure proper alignment between the tap axis and the pre-drilled hole to avoid tap breakage. Use an appropriate cutting fluid or tapping compound for the workpiece material, and never attempt to reverse a broken tap without proper extraction tooling. Follow shop safety protocols and applicable OSHA guidelines when operating rotary cutting equipment.