Measure Thread per inch

Measure Thread per inch Points : Measure Thread per inch, Describe two ways to measure the number of threads per inch All through the machining process the thread must be measured at frequent intervals to accuracy. The easiest way to ensure thread is to fit them into threaded hole or nut. If it does not fit, it is too large and more machining is necessary. This process is usually adopted when close tolerances are not necessary. Thread micrometer is use to build quick and accurate thread measurements. It has a sharp spindle and a double V- anvil, both correctly wrought to contact the screw thread. It gives the reading, for the true pitch diameter, in thousands of an inch which equals the outside diameter less the deepness of one thread.