Webster Hardness Tester

A Portable, Fast, Accurate Hardness Gauge Available in Several Models for Testing Materials such as Aluminum, Brass, Copper and Mild Steel.

Quickly identify tempers.

Tests a variety of shapes that other testers cannot check: Extrusions, Tubing and Flat Stock.

Uses and Applications:

For identifying heat-treated from non-heat-treated parts
Provides correlation between a bench mounted hardness tester and the production line
For segregating materials in stock
For differentiating between soft or work-hardened material
For identifying parts made from improper or substandard alloys
Checking for proper heat-treatment response
Useful in conjunction with stationary laboratory hardness testers. Gives a rapid 100% check on parts which would consume many man-hours with slower operating test equipment
can be used on assemblies which cannot be brought to the laboratory

Features:

One hand operation and portability
Round 3/8 inch diameter anvil permits testing a great variety of shapes
Simple operation permits readings independent of the operator's skill
Test is made by simply applying pressure to the handles until "bottom" is felt
Easy-to-read dial indicator with 20 graduations permits use of the tester as "go" and "no-go" gauge, or values can be converted to other standard scales
Standard hardness gauge tests materials up to 1/4 inch in thickness
Increased capacities available up to 1 inch

Operation:

This sectional view shows the basic design principle of the Webster Hardness Tester. The different models vary only in penetrator and load spring design. These combinations give the ability to test a wide range of hardnesses and metal.

The penetrator housing, which contains the penetrator and load spring, slides vertically in the frame of the tester when pressure is applied to the handles. Only sufficient pressure is needed to "bottom" the lower face of the housing against the work. Resistance of the work to the penetrator causes the penetrator to recede into the housing against the spring pressure. The degree of penetration on the test specimen is indicated on the dial indicator sitting on top of the housing assembly. The load can be varied by adjusting the nut above the load spring, permitting the dial reading to be easily corrected against a test block of known hardness.

A penetration of 0.010 inch produces a full scale reading on the dial indicator. Therefore materials in the softer hardness range should be of sufficient thickness so that the anvil will not influence the test and produce an "anvil effect". In general, soft materials under 0.025 - 0.030 in thickness will not give true readings.

As an alternative product please check our Ames Rockwell Hardness Testers .
Also alternatively see our Advanced Digital Portable hardness tester Computest here
Different models:

Webster hardness testers are available in the following three models:

Model B for Aluminum Alloys
Model B-75 for Brass and Mild Steel
Model BB-75 for Copper

http://www.worldoftest.com/webster.htm

Leebs Rebound Type Portable Hardness Tester

A full range of versatile rebound-type portable hardness testers using the dynamic Leeb Rebound technique, conforming to ASTM A956 and DIN 50156 standards.Leeb technique often is considered a universal method for portable hardness testing. With the Leeb principle an impact body with a hard metal test tip is propelled by spring force against the surface of the test piece. Surface deformation takes place when the impact body hits the test surface, which will result in loss of kinetic energy. This energy loss is calculated by velocity measurements.When the impact body is passing the coil at a precise distance from the surface, a signal voltage is induced during the impact and rebound phase of the test. The voltages are proportional to the velocity.Signal processing by the electronics provides the hardness reading for display and storage.Leeb rebound type portable hardness testers also have certain limitations for minimum sample thickness, weight and surface finish requirements. For lightweight, thin or non-steel samples we can recommend our other type portable hardness testers to ensure high accuracy and repeatability. Our range of rebound type portable hardness testers start from popular and economical versions up to the more sophisticated models and include:

QualiTip (Best Seller)
H1000 (Best Seller)
TH130
TH170
HT100
Hartip 3000
HT200 (Best Seller)

DYNATEST SC Portable Hardness Tester

The purpose of developing this new instrument was to design a portable hardness tester applying a heavy load, comparable to standard Rockwell loads. Also an important fact was to avoid the testing results being influenced by deflection, elasticity or mass of the work piece.

All this has been achieved by development of a new dynamic system, which radically differs from the common models on the market where the test load, being applied by an impact, is not being precise but depends on the reaction it gets; for this reason, these systems can be used only for testing considerable masses that are free of deflection.

With DYNATEST SC, on the contrary, the load acts progressively on the indenter in a very short time and without any impact.

This new system make use of the characteristics of an elastic component, which from load at zero progressively reaches the maximum load and then returns to zero. This component is previously compressed, and then during testing it acts on the penetrator. Thanks to this method, the test load is definite, as it is not produced by an impact but given by the characteristics of the elastic component. In this way the test result is not influenced by any deflection of the work piece.

DYNATEST SC is not influenced by the conditions of the surface to be tested and can be used simply by pressing it on the test surface.

DYNATEST SC enables the users to

Select hardness scale of your choice
Find the minimum measurable thickness
Correct the hardness curve in presence of known values - set + and - tolerance
Perform up to 1000 tests and have them printed afterwards
Perform a series of tests and immediately view the average and the standard deviation
Print out the report in 5 different languages
DYNATEST SC standard configuration

As standard configuration, DYNATEST SC is delivered in a wooden case complete with microprocessor electronic box, output RS232C and the following accessories:

battery charger
diamond indenter
hard metal bar penetrator
test block (HRC, HB30)
3 anvils for flat surfaces
anvil for cylindrical surfaces
template

DYNATEST SC Technical Specifications

DYNATEST SC works according to the Rockwell principle with preload of 68 N (7 kg) and test load of more than 980 N (100 kg). The difference of peneteration between preload and load is processed by a microprocessor and displayed directly in Rockwell C hardness scale or in equivalent Brinell scale compared with test blocks.

DYNATEST SC is equipped with a diamond cone indenter having standard Rockwell section, and a hard metal ball penetrator.


DYNATEST SC Key functions

SCALE SELECT to select the available hardness scales: HRC, 1 HB30, 2 HB30, N/mm², Kg/mm², DPTH
MENU multifunction keypad to gain access to the different functions
PRINT working when the hardness tester is connected to a printer having different print-out
TOL to set up to 4 tolerance values in batch testing.
CAL to correct the hardness curve.
MODE to display the status of the instrument.
ENTER to confirm and save the selected values.
FILE to gain access the file saved (8 files).

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