Main Features

• Electronic loading with closed-loop control of test force;
• Clear and intuitive display, stable and reliable performance;
• Adopts an ARM high-speed processor and an 8-inch LCD touch screen, with user-friendly interface operation;
• Can display the current testing scale, test force, dwell time, hardness conversion value, indenter type, etc.;
• Application, maintenance and removal of test force are carried out automatically;
• Automatic test force compensation with high force accuracy; convex surface hardness values can be automatically corrected;
• Equipped with software calibration function; dynamic display of displacement-force curve during testing for easy observation and analysis;
• Upper and lower limits of test hardness can be set; the buzzer automatically prompts when hardness exceeds the limit;
• Uniquely designed lead screw self-locking mechanism: after the preload is applied in place, it automatically locks the lead screw and handwheel, and automatically applies the test force, eliminating human errors and improving measurement accuracy;
• Model 420HRS-150 has a total of 15 Rockwell hardness scales;
• Model 420HRSS-150 has a total of 30 scales, including 15 Rockwell hardness scales and 15 superficial Rockwell scales;
• Chinese-English language interface switching; conversion of various hardness values;
• Equipped with USB and RS232 data interfaces for convenient user data processing;
• With database data storage function; test data is stored synchronously and can be exported;
• Equipped with a micro printer for direct printing of hardness test results;
• Optional host computer system for data upload and intelligent control operations;
• Accuracy complies with GB/T230.2, ISO 6508-2, and ASTM E18 (USA).

Application Range

Rockwell

• Determine Rockwell hardness of ferrous metals, non-ferrous metals and other soft metal materials;
• Determine Rockwell hardness of carbide and other high-hardness alloy materials;
• Determine Rockwell hardness of quenched, tempered and other heat-treated materials;
• Determine Rockwell hardness of plastics, bakelite and other non-metallic materials.

Superficial Rockwell

• Determine superficial Rockwell hardness of ferrous metals, non-ferrous metals and other soft metal materials;
• Determine superficial Rockwell hardness of metals after surface treatment (carburizing, nitriding, electroplating layers, etc.);
• Determine superficial Rockwell hardness of quenched, tempered and other heat-treated materials;
• Determine superficial Rockwell hardness of carbide and other high-hardness alloy materials;
• Determine superficial Rockwell hardness of plastics, hardboard and other non-metallic materials.

Technical Parameters

• Rockwell measuring range: 20-95HRA, 10-100HRBW, 10-70HRC
• Superficial Rockwell measuring range: 70-94HR15N, 42-86HR30N, 20-77HR45N, 67-93HR15TW, 29-82HR30TW, 10-72HR45TW
• Rockwell test force: 588.4N, 980.7N, 1471N (equivalent to 60kgf, 100kgf, 150kgf)
• Superficial Rockwell test force: 147.1N, 294.2N, 441.3N (equivalent to 15kgf, 30kgf, 45kgf)
• Measuring scales (Model 420HRS-150): HRA, HRBW, HRC, HRD, HREW, HRFW, HRGW, HRHW, HRKW, HRL, HRM, HRP, HRR, HRS, HRV
• Measuring scales (Model 420HRSS-150): HRA, HRBW, HRC, HRD, HREW, HRFW, HRGW, HRHW, HRKW, HRL, HRM, HRP, HRR, HRS, HRV, HR15N, HR30N, HR45N, HR15TW, HR30TW, HR45TW, HR15X, HR30X, HR45X, HR15Y, HR30Y, HR45Y, HR15W, HR30W, HR45W
• Conversion scales: HRA, HRBW, HRC, HRD, HR15TW, HR30TW, HR45TW, HR15N, HR30N, HR45N, HV, HBW
• Resolution: 0.1HR
• Dwell time: 0-99s
• Maximum allowable height of specimen: 245mm
• Distance from indenter center to machine wall: 160mm
• Power supply: AC220V, 50Hz
• Overall dimensions: 533x230x875mm
• Weight: approx. 110kg

Product Configuration (subject to final order)