Sealed pipe joint threads
The TM556 series comprises professional-grade thread milling cutters specifically engineered for the precision machining of 55° British Standard Taper Pipe Threads (BSPT) in accordance with B.S.21:1985. Manufactured from ultra-fine grain carbide, these cutters deliver efficient and precise machining of 55° British threads (G-series), making them an ideal choice for mold making, aerospace, automotive, and general mechanical engineering applications. Available with a range of high-performance coatings, the series ensures exceptional machining efficiency, superior surface finish, and consistent, long tool life across various materials with hardness levels up to 58 HRC. They are particularly well-suited for machining precision threads into steel components for aerospace sensors and navigation equipment, where high reliability is paramount.
| Product Series | TM556 Series |
|---|---|
| Tool Base Material | Ultrafine-grained tungsten carbide |
| Product Name | Coated thread milling cutter |
| OEM / ODM | Made to your samples or drawings |
| Specifications/Model | 1"-11 BSPT |
| Lead time | In stock / 2 weeks |
| Origin | Shenzhen, China |
Design details engineered for accuracy, tool life and process stability.
Strictly adheres to the B.S.21:1985 standard, meeting the threading requirements for imperial tapered-seal pipe fittings; forms the tapered thread in a single pass, boosting machining efficiency by 40% compared to traditional taps.
Thread pitch accuracy is maintained within ±0.005mm, taper tolerance is ≤0.01mm, and surface finish reaches Ra ≤0.2μm, satisfying the rigorous tolerance and sealing requirements of tapered-seal pipe fittings.
Utilizes HRC68-grade ultra-fine grain carbide with 60% higher chip resistance, ensuring stable machining of fitting materials such as steel, brass, and stainless steel.
The cutting edge radius is precisely controlled at 0.003mm, balancing sharpness with wear resistance to minimize edge chipping and ensure machining consistency.
Employs a vacuum ion plating process that increases coating adhesion by 40%, preventing coating delamination from compromising machining precision.
Direct application of cutting fluid reduces friction between the cutting edge and the workpiece, improving surface quality and reducing tap wear.
The cutting edge radius is precisely controlled at 0.003mm, balancing sharpness with wear resistance to minimize edge chipping and ensure machining consistency.
Features an eccentric cutting design that eliminates the need for pre-drilling center holes, allowing for direct threading of blind holes; this reduces process steps and increases efficiency.
Send the thread standard, size and tolerance class. We supply standard taps and thread mills, plus special threads made to your samples or drawings.