Instrument measuring tool - — The types of caliper

Caliper mainly vernier caliper, dial caliper and electronic digital display caliper 3 kinds. (1) the vernier caliper. Using the cursor principle reading ruler shaped hand segment type universal length measuring tool, mainly used for measuring inside diameter, outside diameter, ladder and depth, etc. When measuring, the integer part of the value read from the main ruler, read on the decimal part from the vernier. Cursor principle is to use the scribed line on the foot spacing ( Line spacing) And the line spacing on the vernier to read out the difference between the decimal part. There are zero. 02mm、0. 05 and 0 mm. 01 mm minimum three reading values. (2) dial caliper. Precision rack and pinion pitch as known length, with a corresponding degree of indicator as amplification, segmentation and instructions of the large hand type length measuring tool. Dial caliper can solve the problem of reading error of vernier caliper. Common minimum reading values are 0. 01 mm and 0. 02 mm two kinds. (3) electronic digital caliper. Use the measurement system, such as capacity grid, magnetic grid digital display measuring the length of the value for measuring tool. The resolution of the commonly used is zero. 01 mm, margin of error for & plusmn; 0. 03mm/150mm。 Also has a resolution of 0. 005 mm high precision digital display caliper, permissible error for & plusmn; 0. 015毫米/ 150毫米。 And resolution of 0. General-purpose digital display micrometer calipers, 001 mm margin of error for & plusmn; 0. 005mm/50mm。 Because reading is intuitive, clear, measuring efficiency is higher. In addition, there are various kinds of non-standard special caliper, such as the measurement of the groove depth hook depth callipers, measuring the thickness of the gear tooth thickness calipers, measure the height of the object height caliper and measuring the welding quality of weld caliper ( Weld gauge) And so on. Special-purpose caliper: sharp claws, irregular type unknown dimension measurement bias, ranging from high area location dimension measuring depth, the depth measuring leaf type, narrow slot diameter measurement