Webster Hardness Tester Model BB-75 for Copper

Hardness testing for Copper

(Standard Capacity up to ¼")

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 on a standard test strip of 6061-T6 aluminum alloy of Rockwell E 90± 1 hardness. 

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

Webster Hardness Testers

Webster portable hardness testers are made in three distinct models for testing brass, aluminum, copper, and mild steel. They allow you to quickly identify tempers and test a variety of shapes that other models simply cannot check - including tubing, extrusions, and flat stock.

Every one of Webster's hardness tester models operates in the same manner. The only differences are in the type of load spring, hardness ranges, and penetrator design.

Model BB-75 Webster Hardness Tester

Certain industries needed a method of rapidly testing the hardness of electrodeposited copper in the low hardness range. The Model BB-75 Webster Hardness Tester was the solution. This penetrator is used to give sensitivity while the Model B load spring is employed to give light pressure. This combination allows users to test the soft range of many common materials.

Operation of Webster Hardness Testers

The operation of Webster Hardness Testers is simple. The work being tested is placed between the anvil and the penetrator. Pressure is then applied to the handles until the “bottom” is felt, then the dial indicator is read.

Applications for WEBSTER Hardness Testers:

• Can Be Used on Assemblies That Cannot Be Brought to the Labs
• Checks for Proper Heat-Treatment Response
• Differentiates Between Soft or Work-Hardened Material
• Gives a Rapid 100% Check on Parts That Would Normally Take a Long Time to Test
• Identifies Heat-Treated Parts
• Identifies Parts Made from Improper or Substandard Alloys
• Provides Correlation Between a Bench-Mounted Hardness Tester and the Production Line
• Segregates Materials in Stock
• Useful in Conjunction with Stationary Laboratory Hardness Testing Tools

Features of Webster Hardness Testers:

• Can Be Operated with One Hand
• Easy-to-Read Dial Indicator with 20 Graduations Permits Use as a “Go” and “No-Go” Gauge
• Round 3/8-Inch Diameter Anvil Can Test a Variety of Shapes
• Simple Operation Permits Readings Independent of the Operator’s Skill
• Tests Materials Up to 1/4 Inch in Thickness with Increased Capacities Available Up to 1 Inch
• Test Only Requires Applying Pressure to the Handles Until the “Bottom” Is Felt