Webster Hardness Tester - Nokta Metal Ltd

A Portable, Fast, Accurate Hardness Gauge Available in Several Models for Testing Materials such as

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

Each tester is shipped in a fitted case with a spare penetrator, adjusting wrench and standard test strip

Features:

         One hand operation and portability

         Round 9,5 mm 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 25,4 mm 

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 metals.

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 0,60 - 0.75 mm thickness will not give true readings.

Different models:

Webster hardness testers are available in the following three models:

 

Quick, Accurate, Reliable, Easy

 

for inquiries : Nokta Metal Ltd
Ismailpasa Sokak No: 50 Kosuyolu, Kadikoy, 34718 Istanbul, Turkiye
Tel : +90 (216) 545 7550 / Fax: +90 (216) 545 7549 
e-mail