In the mechanical manufacturing and metallurgical industries, material hardness testing is a critical step that determines product reliability. However, inspecting oversized components, long shafts, or bulky molds with standard testing equipment has always been a major challenge. To address this industrial pain point, Veiyee (China) introduced the HRD-150B Rockwell hardness tester. Featuring a specialized heightened design, this machine has become a top choice for heat treatment workshops and quality control laboratories worldwide.

The HRD-150B is an electro-mechanical Rockwell hardness tester that combines high-rigidity mechanical engineering with automated electrical control. The letter “B” in the model name signifies its “Heightened” or extended-axis capability. Unlike standard hardness testers that limit sample height to around 170mm, the HRD-150B provides a massive vertical testing space of up to 400mm.

This model fully supports the three classic Rockwell scales: HRA, HRB, and HRC. The entire testing cycle—including preliminary loading, main load application, dwell time, and unloading—is driven automatically by an electric motor. This automated process optimizes cycle times and eliminates human errors during physical operation.

To help quality control managers evaluate the compatibility of this machine with their production requirements, here are the detailed technical specifications:

The primary advantage of this heightened Rockwell hardness tester is its ability to accommodate oversized parts. The 400mm vertical capacity allows operators to easily place large crankshafts, heavy-duty gears, forging dies, or thick metal blocks onto the anvil without space constraints. This eliminates the need to cut expensive samples down to size just to fit inside a standard machine.

Instead of relying on a manual hand lever—which often introduces human error due to inconsistent pulling speeds—the HRD-150B utilizes an electric motor drive system. Once the operator sets the initial load and presses the start button, the machine applies the major load smoothly, holds it for the precise pre-set dwell time, and unloads automatically. This uniform process ensures maximum repeatability and data integrity.

The structural body of the machine is manufactured using high-quality cast iron. This heavy-duty casting acts as a natural dampener against ambient workshop vibrations. Inside the machine, a friction-free spindle system transfers the testing force directly to the diamond cone or steel ball indenter with absolute precision, ensuring long-term mechanical stability.

Thanks to its robust construction and extended dimensions, the HRD-150B Rockwell hardness tester is widely used in multiple industrial sectors:

Although the HRD-150B relies on an analogue dial gauge that requires the operator to read results manually, it remains a highly valuable investment. The machine perfectly balances the precision of an automated electric drive, an extra-large vertical clearance, and a highly competitive price point from Veiyee China.

If your facility is searching for a dependable, cost-effective, and heightened Rockwell hardness tester capable of handling heavy industrial workloads, the Veiyee HRD-150B is an exceptional choice.