Made in India
RASN-250-D
Digital Rockwell cum Brinell Hardness Tester
Digital Rockwell tester with the load range extended to 187.5 and 250 kgf for Brinell testing with a 2.5 mm ball. Rockwell results read to 0.1 unit on the digital panel; Brinell impressions are measured with the supplied microscope.
The RASN-250-D from Eklavya Techno Solutions, Ichalkaranji, India, is the digital Rockwell cum Brinell tester for shops that test hardened steel parts and softer castings or forgings on the same machine and want the results recorded electronically. Its load range runs from 60 kgf up to 250 kgf: the 60, 100 and 150 kgf loads serve the regular Rockwell scales A to K, which are read on the digital panel to 0.1 Rockwell units, while the 187.5 and 250 kgf loads are used with the supplied 2.5 mm ball for Brinell scales HBW 2.5/187.5 and HBW 2.5/250.
The Rockwell side works like the RASN-D: set scale, dwell and limits on the panel, apply the load by hand, and the result is displayed, judged, stored with date and time and printed on the built-in thermal printer or exported as CSV over USB. The Brinell side is optical: after the indentation the operator measures the impression diameter with the supplied Brinell microscope and reads the hardness from the tables, because the panel has no Brinell scale. The machine has 230 mm test height, 133 mm throat depth, runs on single-phase 230 V and complies with IS 1586 (Part 2), ASTM E18, ISO 6508-2 and IS 1500 (Part 2).
Major load (total test force): 588.4, 980.7, 1471, 1839, 2452 N (60, 100, 150, 187.5, 250 kgf)
IS 1586 (Part 2) – Rockwell hardness test – verification and calibration of testing machines
ASTM E18 – Standard test methods for Rockwell hardness of metallic materials
ISO 6508-2 – Metallic materials – Rockwell hardness test – verification and calibration of testing machines and indenters
IS 1500 (Part 2) – Brinell hardness test – verification and calibration of testing machines
RASN-D series (digital): models compared side by side, current model highlighted.
| Parameter | RASN-D | RASN-250-D | RASN-Twin-D |
|---|---|---|---|
| Type | Digital Rockwell, manual loading | Digital Rockwell cum Brinell, manual loading | Digital Rockwell cum Superficial, manual loading |
| Major load (total test force) | 588.4, 980.7, 1471 N (60, 100, 150 kgf) | 588.4, 980.7, 1471, 1839, 2452 N (60, 100, 150, 187.5, 250 kgf) | 147.1, 294.2, 441.3, 588.4, 980.7, 1471 N (15, 30, 45, 60, 100, 150 kgf) |
| Minor load (preliminary force) | 98.07 N (10 kgf) | 98.07 N (10 kgf) | 29.42, 98.07 N (3, 10 kgf) |
| Scales | HRA, HRB, HRC, HRD, HRE, HRF, HRG, HRH, HRK | Rockwell A to K; Brinell HBW 2.5/187.5, 2.5/250 | Rockwell A to K; Superficial 15N, 30N, 45N, 15T, 30T, 45T |
| Resolution | 0.1 Rockwell | 0.1 Rockwell | 0.1 Rockwell / 0.1 Rockwell Superficial |
| Display | Digital | Digital | Digital |
| Output | Built-in thermal printer, USB (CSV), PC software | Built-in thermal printer, USB (CSV), PC software | Built-in thermal printer, USB (CSV), PC software |
| Max. test height | 230 mm | 230 mm | 230 mm |
| Depth of throat | 133 mm | 133 mm | 133 mm |
| Net weight (approx.) | 70 kg | 75 kg | 75 kg |
| Machine dimensions (L × W × H) | L-500 × W-170 × H-640 mm | L-500 × W-170 × H-640 mm | L-500 × W-170 × H-640 mm |
| Power supply | 230 V AC, 50 Hz, 1 phase (1 A fuse) | 230 V AC, 50 Hz, 1 phase (1 A fuse) | 230 V AC, 50 Hz, 1 phase (1 A fuse) |
| Standard tables | 50 mm dia flat table; 38 mm dia table with V-groove for 6–45 mm round jobs | 50 mm dia flat table; 38 mm dia table with V-groove for 6–45 mm round jobs | 50 mm dia flat table; 38 mm dia table with V-groove for 6–45 mm round jobs |
| Indenters supplied | Diamond indenter Rockwell RA; 1/16" ball indenter | Diamond indenter Rockwell RA; 1/16" ball; 2.5 mm ball | Diamond indenters Rockwell RA and Rockwell SF; 1/16" ball |
| Test blocks supplied | Rockwell C and Rockwell B test blocks | Rockwell C, Rockwell B and HBW 2.5/187.5 test blocks | Rockwell C, Rockwell B and HR 30 N test blocks |
| Optional | 5 mm step inserts; jack rest for long and heavy jobs; PC software | 5 mm step inserts; jack rest for long and heavy jobs; PC software | 5 mm step inserts; jack rest for long and heavy jobs; PC software |
| Brinell testing | — | Brinell 187.5 / 250 kgf selected manually with the matching ball indenter; impression diameter measured with the supplied Brinell microscope (no Brinell scale on the display) | — |
No. The digital panel reads the regular Rockwell scales to 0.1 units. For Brinell the 187.5 or 250 kgf load is selected by hand with the 2.5 mm ball indenter, the impression diameter is measured with the supplied Brinell microscope and the HBW value is read from the standard tables. If you need automatic Brinell measurement, look at the camera-based B3000 or LB3000 machines.
HBW 2.5/187.5 uses the same force-to-ball ratio as HBW 10/3000, so it gives comparable numbers on steels, cast irons and forgings with a smaller impression that fits on a bench tester. These scales are the usual choice for grey and ductile iron castings, annealed or normalised steel and thick non-ferrous stock where a Rockwell diamond is unsuitable.
The RASN-D is the same digital tester without the 187.5 and 250 kgf loads, ball indenter and microscope. The RASNB has the same Rockwell cum Brinell load range but reads on a dial to 1 Rockwell unit with no storage or printing. The RASN-250-D combines both: full 60 to 250 kgf range, 0.1 Rockwell resolution, thermal printer, USB CSV export and PC software.
Each Rockwell result is stored with date, time, hardness value and scale. Records can be printed on the built-in thermal printer, exported as CSV files over USB for Excel, or transferred to the ETS PC software for reports. High and low limits set on the panel flag out-of-tolerance readings immediately.
The Rockwell function is verified to IS 1586 (Part 2), ASTM E18 and ISO 6508-2 and the Brinell function to IS 1500 (Part 2). Certified Rockwell C, Rockwell B and HBW 2.5/187.5 test blocks are supplied, so every scale can be checked at installation and during routine use. ETS also offers calibration with traceable certificates across India.
