HBRVD-187.5D1 Бринеллю Rockwell & Vickers Hardne

Model HBRVD-187.5D1 Brinell Rockwell &Vickers Hardness Tester using rotary power conversion and optical measuring system , equipped with microscope measuring devices in the body,As a result of using low-speed synchronous motor control unloaded automatic test force, tester force lodingdwell time can through changing the delay potentiometer, with the exception of Rockwell hardness test requirements of artificial dial zero, the Brinell hardness test and Vickers hardness test through microscopes and measuring the diameter of the indentation diagonal, not man-made error of the operation. The hardness tester has high test accuracy, simple, sensitive and easy to use, reliable the Pressure Selecting changed , showing the value is stable.It is applicable for the wide range of factory floor , Laboratories, universities and research institutions.Main technical parameters Preliminary test force(N)98 Total test force Vickers hardness test(N)294588980 Rockwell hardness test(N):5889801471 Brinell Hardness test(N):3066131839 magnification of microscope37.5×75× Minimum division value of micro measuring drum wheel 0.004mm for 37.5× 0.002mm for 75× Total test force dwell time(s)1-30 Max approving height of speciments(mm)170 Distance from indenete center to machine body (mm)140 Machine size(mm)463×175×660 Power supplyAC220V Light voltage:5V/5W Weight(kg)75Hardness test seope Rockwell hardness test (70-85)HRA (30-100)HRB (20-67)HRC Show valueaccuracy±1HR repeatability0.8HR Vickers Hardness test (8-650)HB Show valueaccuracy(δ/):±2.5 repeatability(Hcf/):≤3.0 Vickers hardness test (14-1000)HV Show valueaccuracy(δ/):±2 Repeatability(Hcf/):≤2.5