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Product OverviewMW series aluminum Webster tester is also called clamp type hardness tester, They are divided into MW, MW-20a, MW-20b three types, they are light and portable can be hold by one hand, do not need sample when testing, without high skill requirements. It can do fast NDT test of workpiece on site and meet the needs of quality control and qualified rate. It is widely used in production test, acceptance inspection and products quality inspection of aluminum industries and many companies of windows, door and curtain wall, as well as in engineering quality inspection and technical supervision departments. It is a necessary device in raising qualification rate and saving cost.
Function & applicationConfirm the workpiece is heat-treated or not,
Whether the workpiece is made of improper alloy;
Testing over-long or over-weight workpiece;
Project acceptance of aluminum factories
Do project acceptance in companies of windows, door and curtain wall.
MW series webster hardness tester can be classified into four different types according to alloy content and hardness range. Except for MW-B92, each one has three kinds according to size of material.User should choose the right type to measure in case that you may damage the instrument.
Working PrincipleMW series Webster hardness tester adopts indentation principle. Under pressure, the indentation is inversely proportional to the material hardness. HW is short for hardness of Webster, when the value is 16, it means the hardness is 16HW. The value can be read on the dial and can be changed into HV, HR. If the sample hardness is out of range, the needle will point at 20, if the range is too low, the needle will not move and it will stay at 0.
Working ConditionsThe tester should be used in environment of clean, no vibration and no corrosive medium.
Instrument FeaturesNo corrosion and keep precision after we have put them in salty water(5%) for 4 hour. After 100 times 0.5meters falling test, the pointer does not deflect.Thus to ensure the quality of the instrument.
Small portable instrument, small size, light weight, one-handed operation, can quickly measure the hardness of aluminum alloy;
Test process without sampling, can be non-destructive testing of material hardness;
Easy to learn, no high-skill skills of the operation requirements, the human operation on the measurement results less impact, very suitable for the production site for rapid hardness testing of materials;
There is no strict limit on the shape of the workpiece to be measured, suitable for the detection of different shapes of aluminum;
Equipped with calibration sets to solve the problem due to multiple full scale calibration if there is a calibration error;
Detection and display separated, to avoid blocking display so that user can not read the value.
Operating Method and AttentionsThe use of the process should always pay attention to changes in instrument accuracy, by checking the instrument full scale point (20HW) and the calibration point is inaccurate to find inaccurate and timely correction;
The sample surface should be perpendicular to the pressure needle, the bottom of the sample should be closely fit with the anvil, otherwise it will produce measurement error;
The test should be applied once enough grip strength, slow afterburner will result in low measurement;
Instrument anvil and punch with the same hardness, in addition to check the full scale value, generally do not air play, air play will wear red needle, reduce the needle life;
Read the value of the handle should be maintained before the state of the same force until the pointer is stable and then read, read the pointer hardness value should ensure that the line of sight perpendicular to the surface of the dial to reduce the reading error;
In the test process should avoid the sample twist, otherwise it will cause errors and damage the pointer;
The meter head is an integrated part and can not be forcibly removed.
Instrument MaintenanceThe instrument is a precision instrument, its life depends whether in proper use or good maintenance.User should always remember:
Prevent contamination, use soft cloth to clean the dust or stain of the tester especially remove the contamination on the dial head or it will cause error.
Prevent rust, when using pay special attention to its waterproof performance except clean it frequently, many parts will bear rust with water, the rust in the dial head will cause the instrument useless.
Prevent falling off, the tester is made up of many precision components, falling off will result in permanent damage to some parts.
Do not dismantle, all the components had already been put together properly in factory except calibration.
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Test material Aluminum Alloy(1100~7075 Series) Hardness Range 25～110HRE, 58～131HV Accurate Measurement Range 5~18HW Accuracy 0.5HW Measurement Range 0~20HW -
Webster hardness tester standard block The standard hardness block is the standard configuration for Mitech series Webster hardness testers. With size of 150×25×2（mm）and hardness of 15.5-16.5HW.It is mainly used to judge whether the measuring error of leeb hardness tester is in the permitted range by national standards or international standards. Each standard hardness block is engraved with the serial number and hardness values which are consistent with qualified certificates one by one, to ensure the traceability for the national standards or International standards. The standard block is specially made with plating harden layer process. With high quality material, its hardness value is stable and reliable. It is the necessary part for accurate measurement of the instrument. Webster hardness tester small screwdriver The small Screwdriver, its length 145mm, diameter 3mm, mainly used for full scale calibration and indenter change, is one of the standard configuraion of MITECH Webster hardness tester. Webster hardness tester special wrench The wrench is specially made for Webster hardness tester, its socket diameter 12mm, length 35mm, handle length 50mm,mainly used for standard block calibration and indenter change, is one of the standard configuraion of MITECH Webster hardness tester. Webster hardness tester spare indenter MITECH Webster hardness tester indenter adopts hard steel material with a super high hardness that meets the standard of GB/T32660-2016,and is suitable for most of them home and abroad.Its coning angle 60°,indenter diameter0.4mm. Mainly used to test the hardness of workpiece on the surface,is one of the standard configuraion of MITECH Webster hardness tester. webster hardness tester attached files MITECH Webster hardness tester packing information includes product certification, warranty card, product brochures, packing list. Using a special coated paper printed, brochures graphic design beautiful, easy to understand, easy to long-term preservation. Note: The information of MITECH products can be downloaded at www.gcuvbwo08.cn. webster hardness tester ABS case MITECH Webster hardness tester box, size 27cm × 18cm × 18.5cm. It is made of ABS plastic, which is waterproof and resistant to shock. It has excellent heat resistance, low temperature resistance and so on. It can effectively protect the oil, dust and various kinds of corrosion in harsh environment. The box size is in line with aviation, (Can be placed under the seat and luggage rack), safe, reliable and stable. -
Webster hardness tester standard block The standard hardness block is the standard configuration for Mitech series Webster hardness testers. With size of 150×25×2（mm）and hardness of 15.5-16.5HW.It is mainly used to judge whether the measuring error of leeb hardness tester is in the permitted range by national standards or international standards. Each standard hardness block is engraved with the serial number and hardness values which are consistent with qualified certificates one by one, to ensure the traceability for the national standards or International standards. The standard block is specially made with plating harden layer process. With high quality material, its hardness value is stable and reliable. It is the necessary part for accurate measurement of the instrument. Webster hardness tester spare indenter MITECH Webster hardness tester indenter adopts hard steel material with a super high hardness that meets the standard of GB/T32660-2016,and is suitable for most of them home and abroad.Its coning angle 60°,indenter diameter0.4mm. Mainly used to test the hardness of workpiece on the surface,is one of the standard configuraion of MITECH Webster hardness tester.
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