MHRS-150 Touch Screen Digital Display Rockwell Hardness Tester

Hardness Testers

Overview

The MHRS-150 is a touch screen digital display Rockwell hardness tester that shows the hardness value directly on a 5.5 inch LCD touch screen. It covers the HRA, HRBW and HRC scales used for hardened steel, cemented carbide, stainless steel and non-ferrous metals, and it is built for the routine hardness testing of castings, forgings and machined parts.

Rockwell hardness testing is the standard method for checking heat-treated steel because a single test is quick and the reading comes straight from the machine. The MHRS-150 adds a modern interface and an electronically adjusted measuring system to that long-established principle, so the operator works with a clear display and a stable, repeatable instrument rather than a mechanical dial.

Technical Specifications

Parameter	Value
Model	MHRS-150
Measuring range	20-88 HRA, 20-100 HRBW, 20-70 HRC
Test force	60, 100 and 150 kgf (588.4 N, 980.7 N and 1471 N)
Maximum allowable height of sample	230 mm
Distance from the indenter centre to the machine wall	165 mm
Hardness resolution	0.1 HR
Display	5.5 inch LCD touch screen
Error adjustment range	95 % to 105 % (electronic)
Dimensions	522 × 293 × 729 mm
Weight	98 kg
Power supply	AC 220 V, 50 Hz

Touch screen display and electronic adjustment

The hardness value is shown directly on the 5.5 inch LCD touch screen, so there is no dial to read and no conversion to make in the operator’s head. Through the built-in system the hardness value error can be electronically debugged over an adjustment range of 95 % to 105 %, which lets the machine be trimmed to a standard block rather than being sent away for a mechanical adjustment. ISO 6508-1 covers Rockwell hardness testing of metallic materials, so results from the MHRS-150 are comparable with other machines that follow the same standard.

Construction and stability

The shell is moulded and cast by a special foundry process, so the structure is stable and does not deform and the machine can work in a relatively harsh production environment. The car paint is of a high grade with strong scratch resistance and stays bright after many years of use. The 230 mm maximum sample height and the 165 mm throat between the indenter centre and the machine wall cover a wide range of flat and cylindrical workpieces, and the 0.1 HR resolution keeps the reading fine enough for acceptance testing of hardened parts.

Applications

The MHRS-150 is used for the sample testing and acceptance inspection of castings and forgings, for flat and cylindrical workpieces in steel and non-ferrous metals, and in the automotive and aviation industries for carbide, ceramics and stainless steel. It is equally at home in a laboratory and on the shop floor, which is where its robust cast housing and touch screen interface pay off.

Frequently Asked Questions

What scales does the MHRS-150 Rockwell tester measure?
It covers the HRA, HRBW and HRC scales, with a measuring range of 20-88 HRA, 20-100 HRBW and 20-70 HRC, and a hardness resolution of 0.1 HR.

What test forces does the MHRS-150 use?
It uses the 60, 100 and 150 kgf major loads – 588.4 N, 980.7 N and 1471 N – which are the standard Rockwell forces for the HRA, HRBW and HRC scales.

How is the reading displayed?
The hardness value is displayed directly on a 5.5 inch LCD touch screen, and the built-in system allows the hardness value error to be electronically adjusted over a range of 95 % to 105 %.

What is the maximum sample size the MHRS-150 can take?
The maximum allowable sample height is 230 mm and the distance from the indenter centre to the machine wall is 165 mm, which covers a wide range of flat and cylindrical workpieces.

Which standard governs Rockwell hardness testing?
ISO 6508-1 covers Rockwell hardness testing of metallic materials, so results from a compliant machine such as the MHRS-150 are comparable with results from other machines that follow the same standard.

About CHENJI & Support

CHENJI is the brand of Jinan Chenji International Trade Co., Ltd. (Shandong, China), a manufacturer and exporter of material testing machines since 2014, with in-house quality control plus third-party inspection by SGS or Bureau Veritas. The company holds ISO 9001 certification (626024QH073R1) and is a Bureau Veritas audited supplier (MIC-ASR2451820). Testing machines are normally supplied with a calibration certificate valid for 12 months and traceable to national force standards, and our engineers help you select the machine, fixtures and accessories for your specimen and method.

Every quotation is prepared against the standard you test to, so the delivered machine matches the test method rather than only the headline capacity. Spare parts, consumables and calibration support are available after delivery, and machines can be produced to OEM or ODM requirements when a customer drawing or specification is provided.

Selecting and Verifying a Testing Machine

Choosing a machine is a matter of matching capacity to the specimen and the method, not of buying the largest frame. A 1000 kN machine is not suitable for a sample that needs 1 N of force; capacity selection follows the specimen and the standard, and the force measuring system should be verified per ISO 7500-1 or ASTM E4 on a regular schedule. Load cells are commonly supplied as class 0.5 or class 1, which means the indicated force stays within ±0.5% or ±1% of the true force.

Test results are only comparable when they are quoted together with the standard, the specimen geometry, the test speed and the force measurement class. We are glad to review your test method and specimen so that the machine, fixtures and accessories are correctly specified before you order.

Request a Quotation

Tell CHENJI your material, part size and required Rockwell scale, and we will confirm the MHRS-150 configuration, indenters and price for a quotation.

Email annie@chenjitester.com or call / WhatsApp +86 158 5311 1612.