DRM / EX / RT
Model: 250 DRM / 206 EX / RT
Semi-automatic Rockwell bench testers — 250 DRM, 206 EX and RT families — with Rockwell, Superficial Rockwell and Brinell HBWT options.

About the DRM / EX / RT
Rockwell Hardness Tester 250DRM is a semi-automatic and simple hardness tester HRC, HRB, HRA and other scales, with test loads from 3 to 250 kgf. It works with Rockwell, Superficial Rockwell and Brinell HBWT hardness tests conforming to all hardness testing standards including ASTM E10 – E18 and ISO 6506 – 6508.
250 DRM is a fast and really easy bench hardness testers with high accuracy standards. To perform the test just act on the elevating screw and bring the sample to make contact with the indenter, then push the start button activating preloading and loading in automatic succession; within seconds results appear. Load forces are electronically applied through load cells which eliminates problems associated with dead weight systems on traditional testers. It is not affected by vibration and it doesn’t need to be leveled.
Selection of hardness scales, dwell time, conversion data, return stroke, memory and storage of results, statistics, test temperature measure, calibration, system checkup, tolerance range, in-time results average, correction of round surface and automatic evaluation.
- Rockwell and superficial Rockwell ISO 6508 / ASTM E-18
- Brinell HBWT ASTM E-103 / ISO 6506
- Vickers ISO 6507 / ASTM E-92 (Indentation only)
- Automatic motorized hardness tester
- Main control LCD panel in front of the measuring head for setup of test parameters
- Automatic Motorized Hardness Tester
- Main Control LCD Panel In Front Of The Measuring Head For Setup Of Test Parameters
- Semi-automatic hardness tester for simple measurements
Supported methods documented by AFFRI
- Rockwell
- Superficial Rockwell (S versions)
- Brinell HBWT — model-dependent / on request
- Vickers — indentation only
Technical notes
- AFFRI states that the RT and RTS testers do not perform Brinell direct reading. Conversion scales shown on the display are calculated values, not separate tests.
How the DRM / EX / RT works
Rockwell and superficial Rockwell ISO 6508 / ASTM E-18
HRA – HRB – HRC – HRD – HRF – HRG – HRL – HRM – HRR / HRN – HRT
Brinell HBWT ASTM E-103 / ISO 6506
HB 30 – HB 10 – HB 5 – HB 2,5 – MPa (F/D2)
Vickers ISO 6507 / ASTM E-92 (Indentation only)
HV3 – HV5 – HV10 – HV15 – HV20 – HV30 – HV50 – HV100
Automatic motorized hardness tester:
250 DRM is a fast and really easy bench hardness testers with high accuracy standards. To perform the test just act on the elevating screw and bring the sample to make contact with the indenter, then push the start button activating preloading and loading in automatic succession; within seconds results appear. Load forces are electronically applied through load cells which eliminates problems associated with dead weight systems on traditional testers. It is not affected by vibration and it doesn’t need to be leveled.
Main control LCD panel in front of the measuring head for setup of test parameters :
Selection of hardness scales, dwell time, conversion data, return stroke, memory and storage of results, statistics, test temperature measure, calibration, system checkup, tolerance range, in-time results average, correction of round surface and automatic evaluation.
Automatic Motorized Hardness Tester
250 DRM is a fast and really easy bench hardness testers with high accuracy standards. To perform the test just act on the elevating screw and bring the sample to make contact with the indenter, then push the start button activating preloading and loading in automatic succession; within seconds results appear. Load forces are electronically applied through load cells which eliminates problems associated with dead weight systems on traditional testers. It is not affected by vibration and it doesn’t need to be leveled.
Main Control LCD Panel In Front Of The Measuring Head For Setup Of Test Parameters
Selection of hardness scales, dwell time, conversion data, return stroke, memory and storage of results, statistics, test temperature measure, calibration, system checkup, tolerance range, in-time results average, correction of round surface and automatic evaluation.
Semi-automatic hardness tester for simple measurements
206EX is a semi-automatic and simple hardness tester with test loads from 3 to 187,5 kgf. It works with Rockwell, Superficial Rockwell and Brinell HBWT hardness tests conforming to ASTM and ISO hardness testing standards.
Semi-automatic digital hardness tester:
206 EX is a fast and really easy bench hardness testers with high accuracy standards. To perform the test just act on the elevating screw and bring the sample to make contact with the indenter, then pull the lever activating preloading and loading in automatic succession; within seconds results appear. Load forces are applied through two dynamometric load cells which eliminates problems associated with dead weight systems on traditional testers. It is not affected by vibration and it doesn’t need to be leveled.
LCD and key pad board IP 64 protection:
- Simultaneous view of 2 scales, the one of the test and the one chosen from the list of conversion scales. Conversion values for all hardness scales HB, HV, HSD, HK, HRN, HRT, N/mm.
Semi-Automatic Digital Hardness Tester
206 EX is a fast and really easy bench hardness testers with high accuracy standards. To perform the test just act on the elevating screw and bring the sample to make contact with the indenter, then pull the lever activating preloading and loading in automatic succession; within seconds results appear. Load forces are applied through two dynamometric load cells which eliminates problems associated with dead weight systems on traditional testers. It is not affected by vibration and it doesn’t need to be leveled.
LCD And Key Pad Board Ip 64 Protection
- Simultaneous view of 2 scales, the one of the test and the one chosen from the list of conversion scales. Conversion values for all hardness scales HB, HV, HSD, HK, HRN, HRT, N/mm.
Technical data
- Standards
- EN-ISO 6506 / EN-ISO 6507 / EN-ISO 6508 / EN-ISO 2039 / EN-ISO 868 / ASTM E-18 / ASTM E-10 / ASTM E-103 /ASTM E-92 / ASTM E-2240 / JIS
- Preload
- 29.4 - 98.1 N (3 - 10 kgf)
- Force range
- Rockwell: 588.4 - 980.7 - 1471 N (60 - 100 - 150 kgf) Superficial Rockwell: 29.42 - 147.1 - 294.2 - 441.3 N (3 - 15 - 30 - 45 kgf) Vickers (Only indentation): 29.42 - 49.03 - 98.07 - 147.1 - 196 - 294.2 - 490.35 - 980.7 N (3 - 5 - 10 - 15 - 20 - 30 - 50 - 100 kgf) Brinell HBWT (Mod. 250 DRMC): 49.03 - 61.29 - 98.07 - 153.2 - 245.2 - 294.2 - 306.5 - 612.9 - 1226 - 1839 N - Optional 2452 N (5 - 6.25 - 10 - 15.6 - 25 - 30 - 31.2 - 62.5 - 125 - 187.5 kgf - Optional 250 kgf)
- Feasible tests
- Rockwell: HRC - HRA - HRD - HRB - HRF - HRG - HRL - HRM - HRR Superficial Rockwell: HRN - HRT Vickers (Indentation Only): HV3 - HV5 - HV10 - HV15 - HV 20 - HV30 - HV50 - HV100 Brinell HBWT (Mod. 250 DRMC): HB30 - HB10 - HB5 - HB2.5 MPa (F/D2)
- Load accuracy
- Better than 0.1%
- Preload
- EXS/RTS: 29.4 N (3 kgf) EX/RT: 98.1 N (10 kgf) EX2: 29.4 - 98.1 N (3 -10 kgf)
- Force range
- EX/RT: Rockwell: 588.4 - 980.7 - 1471 N (60 - 100 - 150 kgf) Vickers (Indentation only): 98.07 - 980.7 N (10 - 100 kgf) Brinell HBWT (Optional): 98.07 - 612.9 - 1226 - 1839 N (10 - 62.5 - 125 - 187.5 kgf) EXS/RTS: Superficial Rockwell: 147.1 - 294.2 - 441.3 N (15 - 30 - 45 kgf) Vickers (Indentation only): 29.42 - 294.2 N (3 - 30 kgf) Brinell HBWT (Optional): 153.2 - 294.2 - 306.5 N (15.625 - 30 - 31.2 kgf) 206EX2: The 206EX2 is a twin hardness tester able to perform all the feasible tests achievable with EX and EXS.
- Feasible tests
- EX/RT: Rockwell: HRC - HRA - HRD - HRB - HRF - HRG - HRL - HRM - HRR Vickers (Indentation only): HV10 - HV100 Brinell HBWT (On request): HB30 - HB10 - HB5 - HB2.5 MPa (F/D2) (The RT tester doesn't perform Brinell direct reading) EXS/RTS: Superficial Rockwell: HRN + HRT Vickers (Indentation only): HV3 - HV30 Brinell HBWT (On request): HB30 - HB10 - HB5 - HB2,5 MPa (F/D2) (The RTS tester doesn't perform Brinell direct reading) 206EX2: The 206EX2 is a twin hardness tester able to perform all the feasible tests achievable with EX and EXS.
- Load accuracy
- Better than 0.5%
Data from official AFFRI product information. Values are reproduced as published; final configuration is confirmed in the EMUS quotation.
How EMUS supports this
Equipment is only part of the answer. Every system we supply is backed by regional engineering, service and application support.
Mechanical, electrical, environmental setup done right the first time.
Qualification and acceptance testing against real criteria.
Operator and application training built around your parts.
Traceable calibration to keep measurements audit-ready.
Preventive and corrective service across the Balkan region.
Method development and problem-solving with our engineers.
AFFRI Testing Instruments
TheDRM / EX / RT is part of the AFFRI Testing Instruments portfolio, supplied and supported by EMUS across the Balkan region.
Request Technical Consultation
Talk to an EMUS engineer about theDRM / EX / RT, your parts and tolerances, and the configuration that fits your inspection workflow.














