Hardness Testers

Product Details:

Product Description:

The tester is a hardness scale based on indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a preload.There are different scales, denoted by a single letter, that use different loads or indenters. The result is a dimensionless number noted as HRA, where A is the scale letter.

FEATURES

• Rockwell scales A through H and K
• Stable cast iron construction
• Ideal basic hardness testing for many typical applications

The hammer type Poldi Impact Hardness Tester is suitable for measuring the Brinell Hardness of Steel, Cast iron, Brass, Aluminum, Copper etc. This Poldi Hardness Tester is useful to test parts, where bench type model is not useful. This type of machine is most ideal and simple for Foundries, Workshops, Engineering Colleges, Technical Institutions etc.

PRINCIPLE:Load is applied by a hammer blow on the specimen and a standard test bar in linear direction through a hardened steel ball of 10 mm dia. The impact load on both is the same. The extent of indentation on the specimen and the test bar depends on their hardness. The two diameters of indentations on test bar and specimen are measured by a magnifier supplied along with the tester. The hardness of the specimen can be determined,by referring to the chart supplied with the machine.

TECHNICAL DATA :Hardened Steel Ball:10 mm dia, fixed in a special holder with a spring loaded plunger.

Standard Test Bar:Each bar individually calibrated and Multiplying Factor marked thereon.

Magnifier:Measuring range : 10 mm Scale graduation : 0.1 mm Magnification : 10 x Accuracy of measurement : 0.05 mm

Additional Information:

• Minimum Order Quantity: 1 Unit

Digital Portable Hardness Tester is an advanced pocketable hardness tester distinguished by its high accuracy, wide measuring range, simplicity of operation & above all it is a really portable instrument operating on three pencil cells of size AA. It is suitable for testing the hardness of many materials & finds applications for hardness testing in many areas of industry.

Measuring Method:

• The measuring principle is based on absorption of kinetic energy & its relation in conventional scales of hardness. This is achieved with help of the probe, wherein a small body with a hard tip is propelled against the test surface by a spring & latch arrangement. The motion of the body is the measure of its kinetic energy. The instrument converts the signal of absorbed energy into a chosen scale of conventional hardness.

Typical applications for hardness testing with the portable hardness tester:

• In-situ hardness testing of individual parts or components in assembled machine.
• Hardness testing of mould surface of a die.
• Hardness testing of heavy components like rolls of rolling mill or sugar industry or paper industry.
• Hardness testing of heavy pressure vessels.
• Hardness testing of the production line of components like crankshafts, cylinder blocks.
• Checking hardness of material in stock.
• Hardness testing when required in failure analysis.

Functions available on the display of Indicating Instrument of the portable hardness tester:

• Display of hardness in various conventional scales of hardness as given in the chart below for the standard probe.
• The instrument has compensation for the angle of the probe with respect to vertical while testing.
• Immediate conversion between available conventional scales of hardness.
• Standard deviation & average results up to nine readings can be taken.
• The readings can be recorded & recalled for later viewing. The max capacity being 500 readings. The readings are stored serially & the serial number being displayed. There is a batch number facility as well to distinguish from batch to batch. The entire batch readings can be cleared or the batch number can be reset using the specific keys.
• The machine calibration can be done using the keyboard & there is no need of any expertise to recalibrate the machine.
• Serial port (RS 232) or printer port (Centronics Compatible) is available on request.

 

Specifications of the Indicating instrument Portable hardness tester:

• Overall dimensions of the indicating Instrument: 150mm long, 70mm wide, 50mm high approx.
• Weight of the instrument: 500 Gms. approx.
• Operating Temp: 15°C to 45°C approx.(Type Test report available)
• Measuring accuracy: Mean uncertainty +/- 2.0 % (corresponding to +/- 1.6 HRC at 58 HRC) on
• standard test block. Or +/- 10 BHN on Brinell test block.
• Operates on three dry pencil cells of size AA

Additional Information:

• Item Code: FM-DHT

Features:

• Wide testing range, from the soft metal such as lead, up to the hardest, like hardened steel
• Tiny indentation allows testing of a precision finished parts
• Thin sheet metal is perfectly tested because applied load is very small
• Hardness number is obtained on the same specimen, regardless of the load applied
• Motorized loading and unloading cycle
• Built-in projection screen to get accurate results

 

Construction:

To accommodate the high precision loading system & an optical projection screen the machine frame is designed sturdy. Specimen is placed on the testing table. The test cycle is fully automatic. The accurate load is applied on a diamond penetration by means of a lever & weights. The load is removed automatically after a specific lapse of time. The objective is indexed with the test piece & the diamond indentation is projected on the measuring screen. The diagonals of the indentation can be measured by means of the micrometer screw of the projection screen.

Specification:

Additional Information:

• Item Code: FM-VHT
• Minimum Order Quantity: 1 Piece

Specification:

Additional Information:

• Item Code: FM-PHT-200-P
• Minimum Order Quantity: 1 Unit

Description:

• Model B-3000(J): Simplest model of Brinell Hardness tester with mechanical design, loading, unloading manual, best suitable for testing batch quantities.
• Model B-3000(H): Machine designed with a hydraulic power pack & control circuit for effortless loading-unloading operation. A dial gauge in front measures depth of ball penetration. This facilitates production testing within tolerance limits by compression method.
• Model B-3000(O): Basic Machines design & operation similar to B-3000(H). In addition, an 'optical device' with 14x magnification provided in front to project diameter of ball impression on the glass screen with a micrometer measuring system with 0.01 mm accuracy. The indenter swivels and projects diameter of ball impression immediately after unloading operation which avoids additional time for measurement of ball impression. This gives real Brinell number on production testing.
• Brinell Hardness Testers Model B-3000(H), (O) & (J) are precision engineered conforming to IS: 2281 - 1983, BS: 240 and 240 and ASTM: E 10 however, B-3000 (H), (O), (J) are most suitable for production testing.

 

Specification:

Additional Information:

• Item Code: FM-BHT
• Minimum Order Quantity: 1 Unit