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03B144 - Walter 7/8-14 NF High Speed Steel Taper Tap

Packaging: 1 per each
$135.36/ea

Usually ships within 3-5 business days

SKU: 03B144 Categories: ,

OVERVIEW

Precision Threading with Walter High-Speed Steel Taps

The Walter 7/8-14 NF Taper HSS Tap (SKU: 03B144) is a premium-grade threading tool designed for industrial maintenance, repair, and operations (MRO). Manufactured by Walter Surface Technologies, a leader in metalworking solutions, this tap is engineered to deliver precise, clean threads in a variety of tough materials. Whether you are fabricating new components or repairing stripped threads in existing machinery, this tool provides the reliability professional machinists demand.

Constructed from top-tier High-Speed Steel (HSS), this tap offers significant advantages over carbon steel alternatives. HSS withstands higher temperatures without losing its hardness, allowing for faster cutting speeds and a longer service life. The tool has been meticulously hardened and tempered to resist chipping and breakage under torque, ensuring it remains a staple in your toolbox for years. Its ground threads are manufactured to tight tolerances, guaranteeing that every hole tapped meets the necessary specifications for fastener fitment.

Optimized for Through Holes and Easy Starting

This specific model features a Taper chamfer, characterized by a gradual lead of 7 to 10 threads. This design is critical for two main reasons:

  • Easier Alignment: The tapered end distributes the cutting load gradually, making it much easier to start the tap straight and perpendicular to the hole surface manually.
  • Through-Hole Efficiency: It is the preferred style for tapping through holes, where the chips can be pushed ahead of the tool.

The 7/8-14 NF configuration denotes a 7/8-inch nominal diameter with 14 threads per inch, adhering to the National Fine standard. Fine threads are often preferred in automotive and aerospace applications for their higher tensile strength and resistance to vibrating loose compared to coarse threads. This tap excels in working with aluminum, mild steel, and stainless steel, making it a versatile choice for diverse workshop environments.

Additional Information
Packaging Description:1 per each
Brand:Walter
Item:Tap
Thread Size:7/8-14 NF
Material:High Speed Steel (HSS)
Tap Style:Taper
Thread Type:National Fine (NF)
Application:Thread Repair, Through Holes

INCLUDED

  • 1 x Walter 7/8-14 NF Taper HSS Tap
  • Protective packaging

APPLICATIONS

  • Tapping through holes in metal plates and structural components
  • Repairing damaged or stripped 7/8-14 NF threads
  • Maintenance and assembly of heavy machinery
  • Automotive and aerospace fabrication requiring fine threads
  • Metalworking with mild steel, stainless steel, and aluminum

FAQ

For a 7/8-14 NF thread, the recommended drill bit size is typically 51/64 inch to achieve approximately 75% thread height.

A taper tap has a longer chamfer (7-10 threads) which helps in starting the thread straight, making it ideal for through holes. A plug tap has a shorter chamfer (3-5 threads) and is used after a taper tap or for through holes where less starting help is needed.

Yes, this Walter tap is made from High-Speed Steel (HSS), which is durable enough to cut threads in stainless steel, as well as mild steel and aluminum.

Yes, using a high-quality cutting oil or tapping fluid is highly recommended. It reduces friction, dissipates heat, clears chips, and significantly extends the life of the tap.

NF stands for National Fine. It indicates that the thread pitch (14 threads per inch) is finer than the standard coarse thread (UNC) for this diameter.

While it can be used to start a thread in a blind hole, a taper tap cannot thread all the way to the bottom. You would typically follow it with a bottoming tap to finish the threads near the bottom of a blind hole.

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