03B143 - Walter 7/8-9 NC HSS Bottoming Tap for Blind Holes

Precision Threading with Walter High Speed Steel Taps

The Walter 7/8-9NC Bottoming High Speed Steel Tap (SKU: 03B143) is a premium cutting tool designed for industrial professionals who demand accuracy and durability. Crafted from top-tier High Speed Steel (HSS), this tap is engineered to withstand the high temperatures and stresses associated with cutting threads in tough metals. Unlike standard carbon steel taps, HSS maintains its hardness at higher temperatures, ensuring a longer service life and consistent performance whether you are working with mild steel, aluminum, or stainless steel.

Optimized for Blind Holes

This specific model is a "bottoming" tap, characterized by its very short chamfer length of just 1 to 2 threads. This design is critical for threading "blind holes"—holes that do not go all the way through the workpiece. A bottoming tap allows you to cut threads virtually to the bottom of the hole, maximizing the thread engagement length and ensuring a secure fastener fit. It is typically used as the final step in a tapping operation, following a taper or plug tap, to finish the threads at the bottom of the cavity.

Superior Manufacturing Quality

Walter Surface Technologies is renowned for its commitment to quality, and this tap is no exception. The threads are precision ground rather than cut, which provides a smoother finish and greater accuracy. The tool is hardened and tempered to strike the perfect balance between hardness for cutting edges and toughness to resist breakage. This meticulous manufacturing process results in a free-cutting action that reduces friction, minimizes torque requirements, and produces clean, high-quality threads every time.

Versatile Applications

Whether you are repairing damaged threads in an engine block or fabricating new components in a machine shop, the Walter 03B143 is a versatile addition to your toolkit. It excels in maintenance, repair, and operations (MRO) environments where reliability is paramount. Its compatibility with a wide range of materials, including non-ferrous metals and various grades of steel, makes it a go-to solution for diverse threading challenges.