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Rockwell scale: Models and Operation
The Rockwell hardness test can be conducted on several various hardness testers. All testers, however, fall under one of three categories. Bench model hardness testers can be found either in a digital or analog model. Digital bench models utilize a digital display and typically take more technical training to be able to operate, whereas the analog models are simpler to operate as well as very accurate and display results on a dial on the front of the machine. All bench model testers are usually found within a workshop or laboratory setting. Other testers are portable, and all portable testers will come in a digital model including a digital results screen similar to that of the bench digital model. Nowadays, companies prefer employees to use these portable testers as they are the easiest and most practical to use.

One popular brand among engineers is the Phase portable tester which also includes the options to perform several other types of hardness tests including Brinell, Vickers, and Shore. This proves to be the most efficient form of on-the-go testing throughout a manufacturing setting. This also disregards the need for a conversion chart since all of the work is done within the Phase portable tester.

The Rockwell test is very cost-effective as it does not use any optical equipment to measure the hardness based on the small indention made, rather all calculations are done within the machine to measure the indention in the specimen, providing a clear result in a manner in which is easy to read and understand once given. This also prevents any reworking or finishing needing to be done to the specimen both before and after testing. However, it is critical to double check specimens as the smallest indentions made from testing could potentially result in incorrect measurements in hardness, leading to catastrophe. After time, the indenter on a Rockwell scale can become inaccurate as well and need replacing to ensure accurate and precise hardness measurements.