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Figure 1: Sine bar.

Sine bar is used for measurement of angle of given job or for setting an angle, sine bar is one of the famous instrument for angle measurement. It can be used in combination of slip gauge set and dial gauge for measurement of angle. It is as shown in Fig. 1, which consists of two rollers of same diameters fixed at a distance (L) between them, called as length of sine bar.

Continue reading What is Sine bar? Working Principle, Construction, Diagram & Measurement Procedure

Figure 1: Angle Gauge. Continue reading What is Angle Gauge? Working Principle, Construction, Diagram & Reading Procedure

Spirit levels are used for checking and leveling the surfaces during installation and checking.

Figure 1: Spirit Level. Continue reading What is Spirit Level? Working Principle, Construction, Diagram & Reading Procedure

Figure 1: Micrometer.

Micrometer screw gauge works on the principle of nut and bolt. It consists of an accurate screw with about 10 or 20 threads per cm and revolves in a fixed nut. The rotation of thread is measured, which is already calibrated. Continue reading What is Micrometer? Working Principle, Construction, Diagram & Reading Procedure

Figure 1: Parkinson’s Gear Tester.

Instead of measuring individual errors in gears, composite errors are checked. The composite error indicates the combination of errors in a gear. In Parkinson’s Gear Tester, the gear to be tested is rolled in mesh with a master gear and the errors will be indicated by dial gauge or recording unit. Continue reading What is Parkinson’s Gear Tester (Gear Rolling Tester)? Working Principle, Construction, Diagram & Measurement Procedure