Poldi Hardness Tester Dealers

The hammer type Poldi Hardness Tester is suitable for measuring the Brinell Hardness of Steel, Cast iron, Brass Aluminum, Copper etc. This Poldi Hardness Tester is used 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: The load is applied by a hammer blow on the specimen and a standard test bar in a 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 got the chart supplied with the machine.

APPLICABILITY- The hammer type Poldi impact hardness tester is useful for simple and quick determination of Brinell hardness of metals such as steel, Cast Iron, Brass, Aluminium, Copper etc. Due to easy handling and maneuverability, this tester is most suitable for testing heavy castings and other components.PRINCIPLE-Load is applied to the specimen and a standard test bar in a linear direction through a special Brinell Ball of 10 mm dia. by a hammer blow. With the impact load being consistent, the extent of indentations obtained on the specimen and the test bar depend on their hardness, harder material gives less depth of indentation. The two diameters of indentations are measured by a special "Magnifiscope" measuring magnifier supplied with the tester. By referring to the table provided, the hardness of the specimen can be determined.TECHNICAL DATA-Brinell Ball: 10 mm dia. Fixed in a special holder with a spring loaded plunger.Standard Test Bar: Each bar individually calibrated with multiplying factor markingsMAGNIFISCOPE: Measuring magnifier Measuring range : 10 mm - Scale graduations : 0.1 mm - Magnification: -10 x - Accuracy of Measurement: 0.05 mmHARDNESS TABLES: Comparison Tables for finding hardness. Separate Tables for Steel, Cast Iron, Brass, Copper and Aluminum.GROSS DIMENSIONS:170 x 65x 40 mm (approx.)

These Hardness Testers are used to Test the Hardness of Steel, Steel castings, Cast Iron, Forgings, very large components, etc.

Insert the tapered end of the standard test bar after cleaning into the space provided between the ball and the plunger and slide it further beyond the tapered position. The test bat will thus be firmly gripped between the ball and the plunger pressed by a spring. The specimen to be tested be properly ground or filed and polished at the surface where it is to be tested to ensure accurate readings, With standard test bar inserted place the tester vertically on the specimen such that the ball touches the polished surface. Give a blow on the top of the plunger, with a hammer. The blow should not be very hard and should as vertical as possible. The blow will cause two indentations, one on the standard test bar and the other on the specimen. The diameters of these two indentations should be measured accurately with magnifier having, lease count of 0.1 mm provided with the machine. If the indentations so obtained are slightly elliptical, average diameter should be found out. The distance between the centers of any two indentations on standard test bar should be less than 15mm. If the bar is fully utilized it has to be replaced. The limiting indentation diameter on the standard test bar is 4.2mm

Load is applied to the specimen and a standard test bar in a linear direction through a special Brin ell Ball of 10 mm dia. by a hammer blow. With the impact load being consistent, the extent of indentations obtai ned on the specimen and the test bar depend on their hardness, harder material gives less depth of indentation. The two diameters of indentations are measured by a special “Magnifiscope" measuring magnifier supplied with the tester. By referring to the table provided, the hardness of the specimen can be determined

• Display Type: Analog
• Accuracy: 0.1 mm
• Hardness Scale: 10 mm
• arameter: Metal Hardness
• Automation Grade: Manual

FEATURES: The hammer type  Poldi impact Hardness Tester is suitable for measuring the Brinell Hardness of Steel ,Cast iron , Brass Aluminium. 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 alongwith the tester. The hardness of the specimen can be determined, by referring got 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 mmMagnification                                10xAccuracy of measurement         0.05 mmHardness Tables:-Comparison tables for finding hardness Separate Tables for Steel, Cast iron , BrassCopper and Aluminium.

• Material: Steel, Cast Steel
• Probe Type: D/DC
• Vickers: 83,976

The D-2 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 body is the measure of its kinetic energy. The instrument converts the signal of absorbed energy in to a chosen scale of conventional hardness.

One of these is the Poldi-hammer shown in the figure given above. The hammer type portable impact hardness tester is useful for simple and quick determination of Brinell hardness of metals such as steel, Cast Iron, Brass, Aluminium, Copper etc. Due to easy handling and maneuverability, this tester is most suitable for testing heavy castings and other components, difficult to be carried to a table type hardness tester.For testing, load is applied on the work piece (specimen) and a standard test bar in linear direction through a special Brinell Ball of 10 mm diameter by a hammer blow as explained below. The tester is supplied with calibrated bars of different hardness. For hardness measurement, selection of a calibrated bar is done such that its hardness is approximately equal to hardness expected of the work piece. For a given hardness of calibration bar, at the ratio of the two diameters you’ve measured, a value of hardness is given, the hardness of the work piece.

We are operating as the successful distributor and trader of Poldi Type Metal Hardness Tester. The offered product is used for testing the hardness of ferrous and non ferrous metals. It is dimensionally accurate and has been sourced from a reliable vendor base for maintaining quality. Our product range is regarded for being flawless, is supplied within the stipulated time period and also is in tune with the international standards. “Poldi” type impact hardness tester for metals (ferrous as well as nonferrous) with 10 mm Brinell ball indentor and with Magnifiscope, supplied with instruction manual in four languages Viz., English, German, Portuguese ,Russian.   Features:   Long service life Intricately designed Reliable  

Manufacturer & Exporter of Poldi Hardness Tester & 8x Magnifier Lens type Poldi Hardness Tester. Our product range also comprises of Portable Hardness Tester, Digital Ultrasonic Thickness Gauge and Digital Coating Thickness Gauge.  

• diameter: 10 mm

The hammer type Poldi 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.

    DIRECTIONS FOR USE OF POLDI HARDNESS TESTER MODEL “NP”:   Insert the tapered end of the standard test bar after cleaning into the space provided between the ball and the plunger and slide it further beyond the tapered position. The test bat will thus be firmly gripped between the ball and the plunger pressed by a spring. The specimen to be tested be properly ground or filed and polished at the surface where it is to be tested to ensure accurate readings, With standard test bar inserted place the tester vertically on the specimen such that the ball touches the polished surface. Give a blow on the top of the plunger, with a hammer.     The blow should not be very hard and should as vertical as possible. The blow will cause two indentations, one on the standard test bar and the other on the specimen. The diameters of these two indentations should be measured accurately with magnifier having, lease count of 0.1 mm provided with the machine. If the indentations so obtained are slightly elliptical, average diameter should be found out. The distance between the centers of any two indentations on standard test bar should be less than 15mm. If the bar is fully utilized it has to be replaced. The limiting indentation diameter on the standard test bar is 4.2mm.         SPECIFICATION OF POLDI TESTER           MATERIAL : ALLOY STEEL EN-8 OR EN-9   DIA : 30 MM   LENGTH : 85 MM           TUNGSTON CARBIDE BALL       DIA   10 MM           POLDI BAR       MATERIAL : ALOOY STEEL EN-8 OR EN-9 OR CARBEN STEEL- WPS    SIZE : 12mm x 12mm x 150mm   EYE PIECE : 8 X   BRINELL MICROSCOPE   25 X (OPTIONAL AT EXTRA COST)             Tensile strength and Brinell Hardness Numbers of various metals can be found as under :     STEELS   The booklet contains two tables, one for steel in natural of annealed state and the other for steels in hardened or hardened and tempered state. It is necessary to know the condition of specimens before and It, however it is not known or cannot be determined then first tables for natural or annealed steels be used for specimens having Brinell hardness of up to 360. When the hardness of the specimens exceeds 360, the other tables are to be used.         OTHER METALS           Separate Tables have been provided for other metals, e.g. Brass, Copper, Aluminium, Bronze and Cast Iron. These tables do not show the tensile strength of these metals but only the Brinell hardness number because the relation between the Brinell hardness & the corresponding tensile strength has not yet established with as much reliability as in the case of steels.           PROCEDURE           After measuring the actual dia of indentation on standard test bar the column “Dia of indentation on standard test bar” should be referred for the same value and for actual dia of indentation on work piece the raw “Dia of indentation on work piece” should be referred. Where the horizontal and vertical columns intersect the tensile strength in tones per sq. in (the upper figures) and the Brinell Hardness Numbers (the lower figures) can be read. To convert tensile strength from tons / sq. in to Kg. / sq. mm use a multiplying factors of 1.575.           To take care of the varieties in the tensile strength and the hardness of standard test bars coming out of production, each test bar is properly tested and a multiplying factor is inscribed on it, at one end.           For determining the exact tensile strength and hardness of specimens, multiply, the reading found from the tables by this multiplying factor.                 EXAMPLE             Diameter of ball indentation -           1) On the test bar 1.8 mm. 2) On the specimen (steel in natural condition) 1.7 mm.           Tensile strength founds from Tables 50.8 tone/sq. inch after multiplying with 1.575 to convert in to kg/sq. mm comes to 80 Kg./sq.mm.           Brinell Hardness Number found from tables 225 BHN.           Multiplying factor inscribed on standard test bar: 1.14. Therefore, the tensile strength of specimen is 80 x 1.14 = 91.20 Kg/sq. mm in and the Brinell hardness = 225 x 1.14 = 256.5 BHN. When after some use, the protruding end of the plunger gets deformed by blows, it may be reconditioned and rounded off again or simply replaces.           Poldi type Impact Hardness Tester is not designed to replace the tensile strength testing machine or standard hardness tester. The accuracy of this hardness tester may very sometimes to the extent +/- 10% as against the more accurate table type standard Hardness testers. However, the Poldi Impact Hardness Tester has the advantage of easy handling and greater flexibility. This is very important, especially for testing heavy specimens who cannot be taken to table type hardness are extremely costly eompared to Poldi tester and require greater skill to operated properly.

We are offering Poldi Hardness Tester. Features: the hammer type poldi 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 got 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: 10x accuracy of measurement: 0.05 mm hardness tables:- comparison tables for finding hardness separate tables for steel, cast iron , brass copper and aluminum.

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