The Webster Hardness Testers are a portable, fast, accurate hardness gauge that are made in three distinct models for testing Aluminium, Brass, Copper and Mild Steel. Webster Hardness Testers will quickly identify tempers and test a variety of shapes that other testers cannot check, such as extrusions, tubing and flat stock.
All testers operate in the same manner but differ only in penetrator design, type of load spring and hardness ranges. The principle of operation is simple. The work to be tested is placed between the anvil and the penetrator. Pressure is then applied to the handles until “bottom” is felt at which time the dial indicator is read.
The Model B Tester is designed to cover the hardness of aluminium alloys from the 100 to the 7075 series. The 20 graduations on the Webster dial indicator covers the range between 25 and 110 on the Rockwell E Scale.