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 »