NBS Rubber Abrasion Tester – GenNBS

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NBS Rubber Abrasion Tester - GenNBS

Standards

Ultimate User-Friendliness
Ultimate User-Friendliness
Leading Dependability and Reliability
Leading Dependability and Reliability
NIST Certified Consumables
Strict Compliance with Industry Standards
Stocked Consumables and Spares
Stocked Consumables and Spares
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Trusted After Sales Technical Support
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GenNBS is NextGen's NBS Abrasion Tester used to test the abrasion resistance of vulcanized rubber or other rubber compounds. It is commonly used for the soles and heels of footwear. It has an intelligent power failure recovery system. The unit conducts measurements through volumetric loss of specimens exposed to the action of a normalized abrasive medium secured to a rotations cylinder. Learn all you need to know about NBS Abrasion Testing Systems.

Specifications

Specimen 3 sets, 25.4 x 25.4 x 6.35 mm
Load 2265g, 3 sets
Counter LCD 0 - 999.999
Rotation Speed 45&#plusmn;5 rpm
Suction 2kg/cm2
Spare Parts Standard Rubber (5pc)
North American #40 Grit (1pc)
Dimension (W x D x H) 21.65 x 11.80 x 19.70-inches
55 x 30 x 50 cm
Weight 154 lbs / 70 kg
Power 110V/60Hz or 220V/50Hz
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FAQs

During testing, technicians follow the ASTM D1630 abrasion standard guidelines.

First, the technician unlocks a bridge holding the gauges. The bridge is then lifted to allow the arms to swing backwards for mounting of the specimen. Each compound is then mounted and secured in the slots.

The operator lowers the arms to the metallic drums. The bridge is lowered and locked in place, with a calibration weight on every arm. The technician likewise calibrates the gauges, then sets the test's number of revolutions. Finally, the operator presses the button to start the abrasion testing.

Prior to the actual testing, the equipment is given a break in run to allow the conditioning of the new abrasive paper. Garnet paper with #40 grit is used for the test. It can be used for 18 runs.

The abrader makes 500 revolutions employing break in compounds. It makes a second run of another 500 revolutions. Standard reference compounds are used for the second run. The compounds are discarded after the runs.

In the actual run, the new reference compound is used together with the previous three compounds. The four compounds then undergo four passes. Each pass tests three compounds.

The first pass if for testing the three previous reference compounds. The second pass is for the first two reference compounds along with the new compound. The third pass is for the third, together with the new compound as well as the first compound. The final pass is for testing the new compound, and the second and third reference compounds.

The operator runs the NBS tester until the compounds’ surface matches the drum’s shape. The gauges and revolution counter is set to zero. The operator then restarts the tester.

The tester runs until it 0.1 inch is scraped off from the compounds. The gauges indicate the amount of the material scraped off. The technician logs the readings and number of revolutions from each gauge. He then computes the number of revolutions required to abrade 0.1 inch from all compounds.

The tester needs another run, this time with new standard reference compounds. The reference compounds are then removed and a new compound is mounted on the arms.

The machine will stop from running when it has abraded 0.1 inch off the fresh set of specimens. The operator gets the values from the initial two runs in the latest computation.

Although the NBS abrasion test machine applies the same principle as other rubber abrasion testing machines, the NBS method is designed specifically to test materials that fall under a thickness level not lower than 2.5 mm.

The NBS testing machine employs a test specimen that is abraded against a rotating drum that is covered in abrasive materials. A weight is put in place to pull the specimen towards the drum with the use of a consistent force. The testing machine operator gauges the strength of the material by assessing the remaining volume after a test cycle.

There must be three reference compounds as well as a new reference compound used for testing. The original reference compound standard must be 8 inches long and 1 inch wide. Laboratories cut the material to the standard size specifically for rubber abrasion testing.

The standard reference compound size should measure 1 x 1 x 0.25 inch. The specimen must be of this size in order to fit into the NBS abrasion testing machine's arm slot.

If a specimen is over the standard thickness, it will require buffing until it is reduced to the appropriate size. On the other hand, thinner specimens should be stacked or piled in layers until the required thickness is achieved.

The new reference compound must have been stored during the past six months prior to the scheduled testing. A compound that has been stored for more than six months is not qualified to be used as specimen for the test.

Also, the reference compound must undergo a curing process before the test. This is necessary to make sure that the material will get an even abrasion. The compound reference is cured at a pre-determined temperature.

There is likewise a breach in the compound used for conditioning the new abrasive paper. This break has similar dimensions to the standard reference compound.

The most common test materials for the NBS abrasion testing method are vulcanized rubbers that are a fixture in the footwear industry. To be specific, these materials are used for heels and soles of shoes and other footwear.

The NBS testing machine is ideally used for testing thicker materials. A more abrasive sheet attached to the rotating drum is used to expose the rubber material to more intense revolutions. As a result, the evaluation of wear is achieved faster compared to the results obtained from testing using a DIN abrasion testing machine.

Not all rubber materials can be tested using the NBS abrasion tester. For one, the machine is not suitable for use for thin polyurethane materials. When the material is exposed to the NBS tester's higher abrasion levels, it will result to wearing through after only a small number of short revolutions. The known benchmark for materials appropriate for use with the NBS abrasion testing machine is vulcanized rubber's hardness.

The NBS tester is not suitable for any thin polyurethane materials. Exposing this material to the higher levels of abrasion on the NBS tester will cause them to wear through within only a few short revolutions. The hardness of vulcanized rubber is the benchmark for materials suitable for NBS abrasion testing.

Because the NBS tester is typically used with thicker materials, it uses a more abrasive sheet affixed to the rotating drum to expose the rubber sample to more intense revolutions. This allows for an evaluation of wear at a faster rate than that of a DIN abrasion tester.

Vulcanized rubbers are most common with NBS abrasion test method - typically found in the footwear industry.

The NBS tester uses a test specimen to abrade against a rotating drum covered in abrasive material. A weight pulls the specimen into the drum at a consistent force and the operator can gauge the materials strength by evaluating the volume remaining after the test cycle.

While the principle of the NBS abrasion tester is similar to other rubber abrasion testers, the NBS procedure is specifically designed for testing materials with a thickness of at least 2.5mm.

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