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03B083 - Walter 1/2-13 NC HSS Bottoming Tap for Blind Holes

Packaging: 3 per each
$43.60/ea

Package Price:

$130.80/3 per each

Usually ships within 3-5 business days

SKU: 03B083 Categories: ,

OVERVIEW

Precision Threading with Walter High-Speed Steel Bottoming Taps

The Walter 03B083 1/2-13 NC Bottoming Tap is a premium-grade threading tool designed for industrial professionals who demand accuracy and durability. Manufactured from high-quality High-Speed Steel (HSS), this tap is engineered to withstand the high thermal and mechanical stresses associated with cutting threads in tough materials like stainless steel, mild steel, and aluminum. Unlike standard carbon steel taps, Walter's HSS composition ensures that the cutting edges remain sharp longer, reducing the frequency of tool replacements and ensuring consistent thread quality over the lifespan of the tool.

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 applications involving blind holes—holes that do not go all the way through the workpiece. Standard taper or plug taps leave unthreaded space at the bottom of a hole due to their longer chamfers; however, the Walter 03B083 allows the user to cut full-depth threads virtually to the very bottom of the hole. This capability is essential in precision machinery, mold making, and heavy equipment repair where maximizing thread engagement depth is necessary for fastener strength.

Walter Surface Technologies has meticulously ground the threads on this tap to ensure tight tolerances and reduced friction. The precision grinding process results in smoother cutting action and better chip evacuation compared to cut-thread taps. The tap is hardened and tempered to provide the optimal balance between hardness for cutting and toughness to resist breakage under torque. Whether used in a hand tapping operation with a tap wrench or in a machine setup, this tool delivers reliable performance. It is an indispensable component of any MRO toolkit, particularly for maintenance personnel tasked with repairing damaged threads or fabricating new components in a workshop environment.

Key Technical Specifications:

  • Thread Size: 1/2" - 13 NC (National Coarse)
  • Material: High-Speed Steel (HSS)
  • Style: Bottoming (1-2 thread chamfer)
  • Application: Blind holes in ferrous and non-ferrous metals
Additional Information
Packaging Description:3 per each
Brand:Walter
Size (in):1/2"
Thread Type:1/2-13 NC
Material:High-Speed Steel (HSS)
Tap Style:Bottoming
Chamfer Length:1-2 Threads
Flute Type:Straight
Application Material:Aluminum, Stainless Steel, Steel
Drill Bit Size:27/64"

INCLUDED

  • 1 x Walter 1/2-13 NC High-Speed Steel Bottoming Tap
  • Protective packaging

APPLICATIONS

  • Creating new threads in blind holes
  • Repairing damaged or stripped threads
  • Maintenance and repair operations (MRO)
  • Automotive engine and chassis work
  • Machining and fabrication workshops
  • Metalworking on stainless steel, mild steel, and aluminum

FAQ

The main difference is the chamfer length. A plug tap has a chamfer of 3-5 threads, making it easier to start, while a bottoming tap like the Walter 03B083 has a very short chamfer of 1-2 threads, allowing it to cut threads all the way to the bottom of a blind hole.

For a standard 1/2-13 NC thread, the recommended drill bit size is 27/64 inch. This provides the correct percentage of thread engagement for a strong hold.

Yes, the Walter 03B083 is made from High-Speed Steel (HSS), which is durable enough to cut threads in stainless steel. It is recommended to use a high-quality tapping fluid to reduce friction and heat.

While it is possible, bottoming taps are difficult to start straight because they lack a tapered lead-in. It is best practice to start the thread with a taper or plug tap and then finish the bottom of the hole with this bottoming tap.

Yes, using a cutting oil or tapping fluid is highly recommended. It lubricates the cutting edges, helps clear chips, and significantly extends the life of the tap while producing a cleaner thread.

NC stands for 'National Coarse'. It refers to the thread pitch standard. A 1/2-13 NC tap has a 1/2-inch diameter and 13 threads per inch, which is the standard coarse thread for this diameter.

This specific SKU (03B083) refers to a single Walter 1/2-13 NC Bottoming Tap.

While HSS taps can be used in machine tapping heads, bottoming taps in blind holes require extreme caution if used with power tools to avoid hitting the bottom and breaking the tap. Hand tapping is often safer for blind holes unless using a specialized tapping head with a clutch.

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