Rockwell Hardness Testers

Our range of Rockwell Hardness Testers  test the hardness value of various materials according to Rockwell Principles. The testing procedure is according to ISO 6508 and ASTM E18. 

The applications of the Rockwell Hardness Testers include hardness value of hard metals, carburized steels, quenched steels, hard cast irons, mild steels, Al-alloys, Cu-alloys and malleable irons. 

These units measure the depth difference between the primary and testing load and convert the depth difference to the hardness value. Machines can be operated semi-automatically.

They are essential testing instruments for quality testing section, university and college, research institution and industrial laboratory.

Types of Rockwell Hardness Testers

Model HR-150A - Rockwell tests, scales A-B-C. (60/100/150kgf) with dial indicator and hand control loading.

Model HR-150DT - Rockwell test with scales A-B-C (60/100/150kgf ) with dial indicator and motor control loading.

Model HRS-150 - Rockwell test with scales A-B-C (60/100/150kgf ) with digital indicator and motor control loading. Hardness value converts to HV, HB.

Model HRM-45 - Superficial Rockwell test scales N & T (15/30/45kgf) with dial indicator and hand control loading.

Model HRM-45DT - Superficial Rockwell test scales N & T (15/30/45kgf) with dial indicator and motor control loading.

Model HRMS-45 - Superficial Rockwell test scales N & T (15/30/45kgf) with digital indicator and motor control loading. Hardness value converst to HRA, HRB, HRC, HV, HB

Model XHR-150 - Tests plastic hardness according to ISO 2039-2 and ASTM D785. Its test scales include HRR. HRL, HRM, HRE,HRK with dial indicator and motor control loading.

Standard Accessories with the Rockwell Hardness Testers

HR0150A, HR-150DT, HRS-150

• Diamond Rockwell indenter (1)
• Ø1.5875mm hardness ball indenter(1)
• Standard Rockwell hardness block (3)

HRM-45, HRM-45DT, HRMS-45

• Diamond Rockwell indenter (1)
• Ø1.5875mm hardness ball indenter(1)
• Standard Superficial Rockwell
• Hardness Block(3)

XHR-15

• Steel Ball Indenter(Ø3.175 Ø6.35,Ø12.7mm)
• Ball indenter (each 1)
• Rockwell Hardness Block( HRE,HRL, HRM,HRR) (4)

Rockwell Hardness Testers: Frequently Asked Questions

1. What is a Rockwell Hardness Tester used for?

Rockwell Hardness Testers are precision instruments used to measure the indentation hardness of a wide range of materials. By measuring the depth of penetration of an indenter under a specific load, these machines determine the durability and strength of materials such as:

• Hard Metals: Quenched steel, carburized steel, and hard cast irons.

• Soft Metals: Mild steels, aluminum (Al) alloys, and copper (Cu) alloys.

• Plastics: Specialized models like the XHR-150 are used for polymers and resins.

2. Which international standards do IDM Rockwell Hardness Testers comply with?

All our Rockwell Hardness Testing machines are engineered to meet the highest global quality standards, ensuring accuracy and repeatability. They comply specifically with:

• ISO 6508: Metallic materials — Rockwell hardness test.

• ASTM E18: Standard Test Methods for Rockwell Hardness of Metallic Materials.

• ISO 2039-2 & ASTM D785: Specifically for plastic hardness testing (Model XHR-150).

3. What is the difference between a Manual and a Digital Rockwell Hardness Tester?

IDM Instruments offers three levels of automation to suit different laboratory needs:

• Manual (e.g., HR-150A): Features a dial indicator and hand-controlled loading. Ideal for straightforward, cost-effective testing.

• Motorized (e.g., HR-150DT): Uses motor-controlled loading to eliminate human error during the weight application phase.

• Digital (e.g., HRS-150): Features a digital display and motorized loading. These models can also automatically convert hardness values to other scales like Brinell (HB) or Vickers (HV).

4. What are the different Rockwell scales (A, B, C, N, T) and which one do I need?

The scale depends on the material thickness and hardness:

• Scales A, B, C: The standard scales used for most metals. (Standard models: HR-150 series).

• Scales N & T (Superficial Rockwell): Used for thin materials or surface-hardened layers where a lighter load is required. (Models: HRM-45 series).

• Scales R, L, M, E, K: Specifically used for testing the hardness of plastics. (Model: XHR-150).

5. What is the maximum specimen size for these testers?

Our standard Rockwell Hardness Testers accommodate specimens with a:

• Maximum Height: Up to 170mm (175mm for plastic testing models).

• Maximum Width: Up to 160mm.

6. What accessories are included with the testing unit?

Each unit comes ready for operation with standard accessories, including:

• Indentors: Diamond Rockwell indenter and/or steel ball indenters (Ø1.5875mm, Ø3.175mm, etc., depending on the model).

• Hardness Blocks: A set of standard Rockwell hardness blocks for calibration and verification.

• Manuals: Comprehensive instructions for setup and operation.

7. Can the hardness value be converted to other scales?

Yes. Our advanced digital models, such as the HRS-150 and HRMS-45, feature built-in conversion software. This allows the user to instantly convert Rockwell results into Vickers (HV) or Brinell (HB) values without manual calculations.

8. Why choose IDM Instruments for hardness testing equipment?

Since 1972, IDM Instruments has been a leading manufacturer and supplier of testing solutions. Based in Australia, we provide:

• Expert Calibration: Ensuring your equipment remains compliant with ASTM and ISO standards.

• Custom Solutions: We can tailor instruments to specific industrial requirements.

• Global Support: Trusted by industry leaders worldwide for reliable, high-precision measurement tools.