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The 1/2 NPT gas pipe machine tap is designed according to the ANSI/ASME B1.20.1 standard for creating tapered threads with a 60-degree angle. The nominal outside diameter of this tap is 21.34 millimeters, and the thread pitch is 14 threads per inch TPI. The overall length of the tool typically ranges from 70 to 85 millimeters, including the cutting section and the standard DIN 376 shank. The tool is usually made from high-speed steel HSS or carbide with a TiN coating, ensuring high wear resistance and long tool life. This tap can produce precise threads in various alloy steels, cast iron, and non-ferrous metals, making it highly suitable for gas and medium-pressure fluid applications.
The taper angle for the 1/2 NPT thread is approximately 1.789 degrees per side, providing a strong mechanical seal in fittings. The recommended cutting speed for this tap is between 6 to 12 meters per minute, and using proper lubricants improves thread quality and extends tool life. The shank design complies with international standards for easy mounting on CNC machines or drill presses. Dimensional accuracy and surface finish of the threads meet ISO class 6H standards, making this tool widely used in oil, gas, and hydraulic industries.
WEBSITE: TAPS MACHINE 1/2 Iran