KHT-M Automatic Rockwell Hardness Tester features a new, stable design. Its manual pre-load wheel and automatic main-load/testing cycle enhance efficiency. The integrated casting body with wider base ensures permanent stability. Manual pre-load improves user operation.
Closed-loop control (load cell, DC motor, electronic unit) replaces weights, ensuring high accuracy (≤0.5%) at all Rockwell test loads.
Plug-and-play technology enables faster, easier installation vs traditional weight machines.
Manual handle wheel applies pre-load.
Automatic main-load and testing cycle.
Extended dolphin nose allows 300mm vertical height and 220mm throat depth.
Integrated casting body with wider base ensures permanent stability.
RS232 & USB ports enable PC communication.

Regular Rockwell hardness tester for metal and plastic materials.
Horizontal protruding indenter design enables internal and external testing.
Tests hard-to-reach surfaces, including internal surfaces of rings and tubes.
Features high measuring precision and wide measuring range (up to 15 Rockwell scales).
Measures carbon steel, alloy steel, cast iron, non-ferrous metals, etc.
Automatic testing cycle: Pre-load to result display, showing value automatically.
Digital display of results; printable or automatically transmitted to PC via USB.
Converts HR value to HB, HV, HK, and σb (tensile strength).
Meets international standards: ISO 6508-2, ASTM E18.
Preload | 98.1N (10kgf) |
Total test force | 588.4N (60kgf), 980.7N (100kgf), 1471N (150kgf) |
Scales | HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, HRK, HRL ,HRM, HRP, HRR, HRS, HRV |
Load dwell duration | 2~50s, can be set and stored |
Resolution | 0.1HR |
Display | High definition backlight LCD |
Operation | Menu selectable, Membrane keypad, Upper/lower limits setting & alarming |
Data statistics | Avg., Max., Min., S, R available, Curved surface correcting automatically |
Memory | Max 400 items of test results stored automatically |
Testing Capacity | 300mm (vertical), 220mm (horizontal) |
Dimensions | 690mm×280mm×860mm |
Power supply | AC, 220V/110V, 50~60Hz, 4A |
Net weight | 85k |
| Gross weight | 120kg |

Host machine | 1 |
Standard hardness block for A scale | 1 |
Standard hardness block for B scale | 1 |
Standard hardness block for C scale | 3 |
ball indenter (1/16″) | 1 |
120°cone diamond indenter | 1 |
Mounting screws for indenter | 2 |
Flat anvil | 1 |
"V" shape anvil | 1 |
Power supply wire | 1 |
Screwdriver for indenter mounting | 1 |
Dust cover | 1 |