The TK-2M device in accordance with GOST 13407-67 is intended for measurement of hardness of metals and alloys by Rockwell's method according to state standard specification 9013-59.
The hardness gage provides grading of products on groups of hardness by means of indications of the arrow indicator according to indexes. In quality an indentorah steel balls by diameter (2,5 ±0,0025) (5±0,004) (10±0,004) mm in accordance with GOST 3722-81 with a hardness of not less HV 850, degree of accuracy 20 are used.
preliminary - 10 kgfs
the general - 60; 100; 150 kgfs.
Limits of measurement of hardness:
scale And - 70... 90 HRA at load of 60 kgfs
scale In - 25... 100 HRB at load of 100 kgfs
scale With - 20... 67 HRC at load of 150 kgfs.
Blundered test loadings:
preliminary ± 2%
the general ± 0,5%.
Variation on loadings within blundered:
on preliminary 2%
on the general 0,5%.
Deviation of the average value of hardness received on the calibrated device from the average hardness of a model measure of hardness of the 2nd category MTR-1 state standard specification 9031-75 of unit of hardness, no more:
HRC 25±5 - ±2,0
HRC 45±5 - ±1,5
HRC 65±5 - ±1,0
HRA 83±5 - ±1,2
HRB 90±10 - ±2,0.
Variation of indications of the hardness gage when checking by its model measures of hardness of the 2nd category MTR-1 state standard specification 9031-75 of unit of hardness, no more:
HRC 25±5 - 2,0
HRC 45±5 - 3,0
HRC 65±5 - 1,0
HRA 83±5 - 1,2
HRB 90±10 - 2,0.
Duration of a cycle of the appendix and removal of the main loading of 5 ±1 sec.
Distance from the center of a print to the case, not less than 130 mm.
Distance from a table to a tip, not less than 200 mm.
Power consumption - no more than 100 W.
Overall dimensions: 500 x 240 x 760 mm.
Weight: 78 kg.
Food parameters: 220B, 50 Hz.