WEBSTER® Hardness Tester
Article No. 11731
Model B Webster Hardness Tester
The WEBSTER Hardness Tester gauges are available in several models for testing materials such as aluminum, brass, copper and mild steel.
Features
- One hand operation and portability.
- Round 3/8 inch diameter anvil permits testing a great variety of shapes.
- Simple operation
- Test is made by simply applying pressure to the handles until "bottom" is felt.
- Easy-to-read dial indicator with 20 graduations converts to standard hardness scale, or can be used as "go" and "no-go" gauge.
- Standard hardness gauge tests materials between 0.025" and 1/4" wall thickness. Increased capacities available up to 1 inch
- Each tester is shipped in a fitted case with a spare penetrator, adjusting wrench and standard test strip
- Standard Test Strip - for everyday use in maintaining calibration of all WEBSTER® Hardness Tester models
- Verified Test Strip - confirmed to be within the hardness specified on the Test Strip label with a certified and traceable Bench Model Rockwell Hardness Tester. Each verified test strip is identified by a serial number and comes with a certificate, valid for one year, which testifies to the exact hardness of the test strip
- 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.
- Two Models available:
- 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. Three increased jaw capacity models are also available: (11732) from 1/4" to 3/8", (11733) from 1/4" to 1/2" and (15045) from 3/8" to 3/4".
- 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.
Procedure
- 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 .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 .025 - .030 in thickness will not give true readings.
Delivery Content
Instrument case, Standard test strip, 25-110 Rockwell E (HA-5501) or 20-100 Rockwell B (HA-5503) Scale, Adjusting wrench, Spare penetrator, Equipped with a 3/8" Standard Diameter Anvil, 1" diameter spacer (11733), 1-1/4" diameter spacer (15045)