SL-5 : Manual weight selection an Manual zero adjustment of Dial gauge
SL-5A : Manual weight selection with Automatic zero setting dial Gauge
SL-5B : Automatic weight selection with automatic zero setting dial gauge
SL- 5C: Arrangement similar to SL 5B with one additional weight of 187.5 kg for Brinell tests
SL- 5D: Arrangement similar to SL 5B with two additional weight of 187.5 kg and 250kg for Brinell tests on this machine small pin having dia 2mm can be tested as plunger is guided with a set of six bearings.
SL- 5E : Rockwell Superficial Hardness Tester with automatic zero setting dial gauge, manual load selection. The major load are N scale besides all fifteen Rockwell Superficial scales. Can be used with this tester
SL-5F : This model is double purpose Hardness Tester suitable for Both Rockwell & Rockwell Superficial hardness test. The Major load of 15,30, 45,60, 100 and 150 kg are applied.