Linear Measurements – Other Instruments for Internal Measurements
Posted by mechlook info on January 19th, 2012 10:54 PM | No Comment
Other Instruments for Internal Measurements
Telescope Internal Gauge. It is used for the measurement of internal diameter of a hole during machining operation (Fig. 2.114). It consists of two spherical contacts carried on two rods. The two rods can slide within ...
Linear Measurements – Pin Gauge for Larger Bores
Posted by mechlook info on January 19th, 2012 10:53 PM | No Comment
Pin Gauge for Larger Bores
The diameter of large bores which cannot be easily measured by micrometer or vernier etc., can be measured by means of a bar with spherical ends, the length of which is slightly less than the diameter ...
Linear Measurements – Four Balls Method for Measuring Diameter of Bore
Posted by mechlook info on January 19th, 2012 10:53 PM | No Comment
Four Balls Method for Measuring Diameter of Bore
A method of determining the diameter of i bore which requires only simple apparatus is shown in Fig. 2.120. Three equal balls are spaced evenly within the bore, and a fourth ball, which ...
Linear Measurements – Small Bore Diameter Measurement: by a Ball on a Wire
Posted by mechlook info on January 19th, 2012 10:52 PM | No Comment
Small Bore Diameter Measurement: by a Ball on a Wire
The principle of this method is shown in Fig. 2.122. A piece of spring wire with a small ball near one end is fastened at its other end to a fixed ...
Linear Measurements – Measurement of Small Bore by a Pivoted Stylus and Auto-Collimator
Posted by mechlook info on January 18th, 2012 08:25 PM | No Comment
Measurement of Small Bore by a Pivoted Stylus and Auto-Collimator
This method is shown diagrammatically in Fig. 2.124. A ball ended stylus, slightly smaller -than the hole to be measured, is set along a diameter of the component and swung into ...
Linear Measurements – Digital Measurement Equipment
Posted by mechlook info on January 18th, 2012 08:25 PM | No Comment
Digital Measurement Equipment
Digital indication is better by far when an exact quantitative value is desired.
The important elements of any electronic digital readout system are the scale unit or transducer and the counter or digital readout unit.
The majority of linear digital ...
Introduction to Comparators
Posted by mechlook info on January 18th, 2012 08:25 PM | No Comment
A comparators works on relative measurements, i.e. to say, it gives only dimensional differences in relation to a basic dimension. So a comparator has to compare the unknown dimensions of a part with some standard or master setting which represents ...