This standard is applicable to centerless grinders of general purpose and ordinary precision. This standard is formulated with reference to ISO 3875-1980 "Precision Inspection of Centerless Cylindrical Grinding Machines". The order of precision inspection items listed in this standard does not represent the order of actual inspection. For the convenience of installation and disassembly of inspection tools and inspection, inspection can be carried out in any order. Inspection items can be increased or decreased according to the agreement between the user and the manufacturer. Type I machine tools refer to machines in which the grinding wheel spindle is supported on one side of the grinding wheel (overhang type). Type II machine tools refer to machines in which the grinding wheel spindle is supported on both sides of the grinding wheel (double support type). GB/T 4681-1984 Centerless Grinding Machine Precision GB/T4681-1984 Standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Centerless Grinding Machine Accuracy
External cylindrical centerless grladlng machinesTesting of the accuracybzxz.net
This standard applies to centerless grinding machines of general purpose and ordinary accuracy. This standard is formulated with reference to ISO3875-1980 "Centerless External Cylindrical Grinding Machine Accuracy Test" standard. UDC 821.824
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GB4681-84
The order of accuracy test items listed in this standard does not represent the order of actual test. In order to facilitate the installation and disassembly of test tools and test, the test can be carried out in any order.
According to the agreement between the user and the manufacturer, the test items can be increased or decreased. Type I machine tools refer to machines in which the grinding wheel spindle is supported on one side of the grinding wheel (overhang type). Type Japanese machine tools refer to machines in which the grinding wheel spindle is supported on both sides of the grinding wheel (double support type). 1 General requirements
1.1 When using this standard, refer to JB2670-82 "General Rules for Precision Inspection of Metal Cutting Machine Tools", especially the installation and leveling of the machine tool before the precision inspection, the idling temperature rise of the spindle and other components, the inspection method and the accuracy of the inspection tools. 1.2 When inspecting the working precision, the inspection of the test piece should be carried out after fine grinding. 1.3, When the measured length is different from the length specified in this standard, the tolerance should be converted according to the provisions of Item 2.3.1.1 of JB2670-82 according to the length that can be measured. If the conversion result is less than 0.001mm, it will still be calculated as 0.001mm. Issued by the National Bureau of Standards on September 28, 1984
Implemented on August 1, 1985
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This standard is proposed by the Ministry of Machinery Industry of the People's Republic of China and is under the jurisdiction of the Institute of Internal Grinding Machines. This standard is drafted by the Institute of Internal Grinding Machines. From the date of implementation of this standard, the former First Ministry of Machinery Industry Standard B16-4 "Precision of Centerless Cylindrical Grinding Machines" shall be used as the standard.
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