Home >> Products >> Hardness Tester >> Rockwell Hardness >> Dolphin nose indenter Dual Rockwell Hardness Tester
Dolphin nose indenter Dual Rockwell Hardness Tester

Dolphin nose indenter Dual Rockwell Hardness Tester

Model: HRSS-150A

Dolphin nose indenter Dual Rockwell Hardness Tester is a large-platform Rockwell hardness tester that uses the Rockwell (ROCKWELL) measurement principle. It is used for hardness testing of materials such as carbon steel, alloy steel, cast iron, non-ferrous metals, and engineering plastics. It employs advanced international closed-loop sensor control technology to achieve automatic control and the hardness testing process. The loading system uses a high-precision force sensor and a central controller to form a closed-loop circuit, realizing microsecond-level tracking and control of the force application process. It is widely used in metrology, mechanical manufacturing, metallurgy, chemical industry, building materials, and other fields for testing, scientific research, and production.

General Introduction

Model HRSS-150A: Rockwell and superficial Rockwell hardness incorporated tester

Dolphin nose indenter Dual Rockwell Hardness Tester is a large-platform Rockwell hardness tester that uses the Rockwell (ROCKWELL) measurement principle. It is used for hardness testing of materials such as carbon steel, alloy steel, cast iron, non-ferrous metals, and engineering plastics. It employs advanced international closed-loop sensor control technology to achieve automatic control and the hardness testing process. The loading system uses a high-precision force sensor and a central controller to form a closed-loop circuit, realizing microsecond-level tracking and control of the force application process. It is widely used in metrology, mechanical manufacturing, metallurgy, chemical industry, building materials, and other fields for testing, scientific research, and production.

Key Features

  • Features
  • Principle
  • Standard
  • Application

1. Specially designed dolphin nose indenter, this head horizontally protruding ring can be measured, such as general hardness tubular parts can not be measured, the minimum inner diameter of 25mm test

2. The touch-screen interface, easy to operate, in any language version

3. There is no need to install weights or installation.

4. Electric load and closed-loop control

5. Test force automatic correction, improve the accuracy of a force of magnitude

6. All Rockwell scale, high, medium and low hardness value is automatically corrected three sections

7. Set up a password-protected setup parameters; keeping more samples and test information

8. U disk save measurement data to EXCEL format for easy editing and processing

9. modular design, easy maintenance.

  1. The indenter moves down into position on the part surface

  2. A minor load is applied and a zero reference position is established

  3. The major load is applied for a specified time period (dwell time) beyond zero

  4. The major load is released leaving the minor load applied.

Dial Analog Rockwell Hardness Tester

The resulting Rockwell number represents the difference in depth from the zero reference position as a result of the application of the major load.


ASTM E18 “Standard Test Methods for Rockwell Hardness of Metallic Materials”

ISO 6508 “Metallic materials — Rockwell hardness test”

ASTM D785 “Standard Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials”

● Measuring the Rockwell hardness of soft metal materials such as ferrous and non-ferrous metals;

● Measuring the Rockwell hardness of high-hardness alloy materials such as cemented carbide;

● Measuring the Rockwell hardness of heat-treated materials such as quenched and tempered metals;

● Measuring the Rockwell hardness of certain non-metallic materials such as plastics and bakelite.

Main Technical Specification

ModelHRSS-150A
MethodsRockwellSuperficial Rockwell
Hardness scalesHRA,HRB,HRC,HRD,HRE,HRF,HRG,HRH,
HRK,HRL,HRM,HRR,HRP,HRS,HRV
15N,30N,45N,15T,30T,45T,15W,30W,
45W,15X,30X,45X,15Y,30Y,45Y
Initial testing force98.07N (10Kg)29.42N (3Kg)
Total test force588.4N(60Kg), 980.7N(100Kg), 1471N(150Kg)147.1N(15Kg), 294.2N(30Kg), 441.3N(45Kg)
Measuring range

HRA:20-88,HRB:20-100,HRC:20-70,HRD:40-77,

HRE:70-100,HRF:60-100,HRG:30-94,HRH:80-100,

HRK:40-100,HRL:100-120,HRM:85-115,HRR:114-125

HR15N:70-94, HR30N:42-86, HR45N:20-77,
HR15T:67-93, HR30T:29-82, HR45T:1-72
Duration time control0-99S adjustable
Hardness value Resolution0.1 Rockwell hardness unit
Test load accuracy<0.5%
Touching screen displayMenu selection, hardness value displaying, data statistics, storage, parameter setting etc.,
Data storageUSB flash disk; Save in U disk in EXCEL format
Scales exchangeBrinell, Vicker’s Rockwell, Superficial Rockwell etc.
Max. height of specimen300mm
Max. width of specimen250mm
Dimensions720×280×840mm
Weight80Kg
Power supplyAC 220V, 50-60HZ
StandardBSEN 6508, ISO 6508, ASTM E18, GB/T230


Main accessories


ItemQuantity
Frame1 set
Rockwell diamond indenter1 pc
Ball indenter with the diameter of 1.5875 mm1 pc
Hardness block (HRC, HRB, HR15N, HR30N, HR30T)6 pcs
Large, medium, V-type testing bench1 set each
Fuse 2A1 pc
Power cable1 pc
U disk, touch pen1 pc
Documents (Manual, packing list, certificate)


Require More Customized Solutions?

We offer customization to meet your specific needs. Our expert team will collaborate with you to develop the perfect product for you
Customize Now

Beijing United Test Co., Ltd.