Definition of Straightness of a Line in Two Planes A line is said to be straight over a given length, if the variation of the distance of its from two planes perpendicular to each other and parallel to the general direction of the line remains within the specified tolerance limits. The tolerance on the straightness
Straightness Measurement and Definition of Straightness Read More »
The methods used for measuring the surface finish are classified into Inspection by comparison Direct Instrument Measurements Inspection by comparison methods In these methods of measuring, the surface texture is assessed by observation of the surface. The surface to be tested is compared with known value of roughness specimen and finished by similar machining process.
Methods of Measuring Surface Finish (Measurement) Read More »
To find out the accuracy of a screw thread, it will be necessary to measure the following: Major diameter Minor diameter Effective or Pitch diameter Pitch Thread angle and form Measurement of major diameter The instruments which are used to find the major diameter are Ordinary micrometer Bench micrometer. Ordinary micrometer: The ordinary micrometer is
Measurement of Various Elements of Thread Read More »
Form measurement includes screw threads measurement, gear measurement, radius measurement, surface finish measurement, straightness measurement, flatness and roundness measurements. Introduction Measurement of Screw Threads Measurement of screw threads are used to transmit power and motion and also used to fasten two components with the help of nuts, bolts and studs. There is a large variety
Measurement of Screw Threads – From Measurement Read More »
Image shows vertical axis wind turbine type wind machine. One of the main advantages of vertical axis rotors is that they do not have to be turned into the wind steams as the wind direction changes. Because their operation is independent of wind direction, vertical axis machines are called panemones. Vertical axis wind turbine (or
Vertical Axis Wind Turbine – Advantages and Disadvantages Read More »
Image shows a schematic arrangement of a horizontal axis wind machine. Although the common wind turbine with a horizontal axis is simple in principle yet the design of a complete system, especially a large one that would produce electric power economically, is complex. It is of paramount importance that the components like rotor, transmission, generator
Horizontal Axis Wind Turbine – Advantages and Disadvantages Read More »