Hertel K013032AS Spiral Point Tap 7/8-9 Unc Hss

Product Description

The HERTEL K013032AS is a spiral point tap designed for cutting internal threads in through-hole applications. Built from high speed steel with a bright finish, it cuts a 7/8-9 UNC thread profile with a bottoming chamfer, making it suitable for threading close to the bottom of a bore where a standard or plug chamfer would leave unfinished threads. The 3-flute spiral point geometry pushes chips forward ahead of the cutting edge, keeping the flutes clear during the cut. This tap is intended for use by machinists and maintenance technicians working with ferrous and non-ferrous materials in production or repair environments.

This tap is suited for threading operations in machine shops, manufacturing facilities, and industrial maintenance settings. It carries a 3B class of fit designation, indicating a standard tolerance range appropriate for general-purpose fastener applications. The 2-7/32 inch thread length accommodates deep threading passes in through-hole workpieces. Right-hand thread direction is standard for conventional fastener assembly. Coolant-through capability is not included in this design.

Key Features

• 7/8-9 UNC thread form for standard unified coarse-pitch internal threading
• Bottoming chamfer for threading close to the base of a through or blind hole
• 3-flute spiral point design pushes chips forward to reduce clogging
• H4 thread limit for controlled tolerance in 3B class fits
• High speed steel construction provides durability across a range of workpiece materials
• Bright finish with no coolant-through requirement simplifies tooling setup

Compatibility

Designed as an OEM-style replacement or direct tooling option for machines and fixtures requiring 7/8-9 UNC internal thread cutting with a bottoming chamfer and 3B class of fit.

Installation Notes

Installation and use should be performed by a qualified machinist familiar with tapping operations and proper speeds and feeds for the workpiece material. Ensure the workpiece is securely clamped and the tap is properly aligned before engaging the spindle or tap handle. Use an appropriate cutting fluid or tapping compound to extend tool life and improve thread quality. Inspect the tap for wear or chipping before each use and replace if cutting edges appear degraded.