Protable rockwell hardness gauge 1.small size,light weight 2.simple operation 3. ... /T230.2-2004. Rockwell Hardness Tester PHR Series small size, light weight, simple operation, easy to use, high ... industry is important, a variety of small and medium size metal parts can be tested, a wide range of ... of more than Φ3mm bar and have the appropriate size of the workpiece. Using convex cylindrical Anvil, you ...