WEBSTER® Instrument Brochure
4Pages

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 nonheat-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. WEBSTER INSTRUMENT, INC. 11856 Mississippi Avenue Los Angeles, California 90025 Tel. (310) 479-6770 FAX (310) 478-1365

The Model B Tester is designed to cover the hardness of aluminum alloys from the 1100 to the 7075 series. The 20 graduations on the Webster dial indicator covers the range between 25 and 110 on the Rockwell E Scale. The graphs on this page show the range covered by the Model B Tester. The lines for these graphs were derived from many tests on a variety of alloys and show an average curve. Production lots of alloys can vary in work-hardening characteristics which may result in instances where readings do not fall precisely on the curve. All tests were conducted with the Model B Tester set to...

The Model B-75 Tester was developed to obtain more sensitive response to slight changes in the upper range of hardness covered by the Model B. This sensitivity is particularly useful in testing mild steel and the stronger aluminum alloys. For brass the B-75 covers the range from annealed to full-hard. This added sensitivity is accomplished by incorporating a penetrator of slightly different contour and a heavier load spring than used in the Model B. The 20 graduations on the Webster dial indicator covers the range between 20 and 100 on the Rockwell B Scale. The graphs on this page show the...

The Model BB-75 Tester was developed to answer the need of certain industries for a method of rapidly testing the hardness of electro-deposited copper and copper in the low hardness range. The B-75 penetrator is used to give sensitivity and the Model B load spring is employed to give light pressures. This combination allows the user to test the soft range of many common materials. The graph below shows the range covered by the Model BB-75 Tester on copper. Results were derived from many samples, and show the average curve. All tests were conducted with the Model BB-75 Tester set to read 17...