Made in India
RASN-Twin-D
Digital Rockwell cum Superficial Hardness Tester
RASN-Twin-D
Digital twin-range tester for regular Rockwell and superficial N/T scales with 3 kgf and 10 kgf minor loads. Results in 0.1 Rockwell units, stored with date and time and exported as CSV over USB or printed on the built-in thermal printer.
The RASN-Twin-D is the digital twin-range Rockwell tester manufactured by Eklavya Techno Solutions in Ichalkaranji, India. It tests the regular Rockwell scales A to K with 60, 100 and 150 kgf major loads and the superficial 15N, 30N, 45N, 15T, 30T and 45T scales with 15, 30 and 45 kgf loads, using a 10 kgf or 3 kgf minor load as the scale requires. Results are shown to 0.1 Rockwell and 0.1 superficial Rockwell units, judged against operator-set high and low limits, stored with date and time, and printed on the built-in thermal printer or exported as CSV over USB.
The superficial scales matter for case-hardened, induction-hardened and nitrided parts, thin sheet and strip, small pins and plated components, where the shallow impression of a light load stays inside the hard layer. Loading is still by hand, which keeps the machine simple and robust, while the panel handles dwell timing and record keeping. The RASN-Twin-D is supplied with regular RA and superficial SF diamond indenters, a 1/16 inch ball, flat and V-groove tables and certified Rockwell C, Rockwell B and HR 30 N test blocks; it has 230 mm test height, 133 mm throat depth and runs on single-phase 230 V.
Major load (total test force): 147.1, 294.2, 441.3, 588.4, 980.7, 1471 N (15, 30, 45, 60, 100, 150 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 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
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) | — |
Anything where a full 150 kgf HRC test would break through the hardened layer or distort the piece: case-carburised and induction-hardened gears and shafts, nitrided components, thin sheet and strip, small pins, springs and plated parts. The 15N, 30N and 45N scales use the diamond SF indenter and the 15T, 30T and 45T scales the 1/16 inch ball, with a 3 kgf minor load.
Readings are displayed to 0.1 Rockwell on the regular scales and 0.1 superficial Rockwell on the N and T scales. Every result is stored with date, time and scale and can be printed on the built-in thermal printer, exported as a CSV file over USB or collected by the ETS PC software; high and low limits give an instant pass or fail indication.
The RASN-Twin reads the same scales on a dial to 1 unit with no storage or printing. The RASN-Twin-D adds the digital panel, 0.1 resolution, dwell timing, limits, USB and printer while keeping manual loading. The RSNE-Twin goes one step further with a motorised load, dwell and unload cycle for production testing.
The RASN-Twin-D is built and verified to IS 1586 (Part 2), ASTM E18 and ISO 6508-2, which cover both regular and superficial Rockwell testing. Certified Rockwell C, Rockwell B and HR 30 N test blocks are included so that each range can be verified at installation and re-checked routinely.
Diamond indenters Rockwell RA and Rockwell SF, a 1/16 inch ball indenter, a 50 mm flat table, a 38 mm V-groove table for 6 to 45 mm rounds, Rockwell C, Rockwell B and HR 30 N test blocks, telescopic screw sleeves, clamping device, machine cover and built-in thermal printer. Optional items are 5 mm step inserts, a jack rest for long heavy jobs and the PC reporting software.
