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We are engaged in offering Abrasion Testing Machines that are used to determine the resistance of small size coarse aggregates and crushed rock. Our machine is fitted with hollow cylinder, mounted on a robust frame on ball bearings. To prevent the abrasive charge from falling on the cover, a detachable shelf is fixed into it. The shelf extends throughout the inside length of the drum. |
Din Abrasion Testing Machine
RISHIKESH DIN Abrasion tester (Abraser / Abrader), which is the original product developed in Germany and sold worldwide, is designed to conform to the ASTM D5963 and IS0 4649 standards (ISO 4649 has replaced the DIN 53516 standard). This top quality and highly popular abrasion tester will allow you to measure the abrasion resistance of rubbers (vulcanized thermo set rubbers and thermoplastic elastomers) that are subject to abrasive/frictional wear in their actual service, such as tires, conveyor drive belts, and shoe soles. Since wear is always a result of abrasion, different test methods have been developed for the simulation of long term wear.
The method conforming to ASTM D5963 / ISO 4649 has proven to be the best way of simulating long term wear. This method enables comparative tests for the control of the uniformity of a specific material. The achieved test results provide important parameters in respect to the wear of elastomers in practical use. The abrasion resistance is measured by moving a test piece across the surface of an abrasive sheet mounted to a revolving drum, and is expressed as volume loss in cubic millimeters or abrasion resistance index in percent. For volume loss, a smaller number indicates better abrasion resistance, while for the abrasion resistance index, a smaller number denotes poorer abrasion resistance. The DIN Abrasion tester can also be used for comparative measurements on other materials such as plastics, chalk or painted surfaces.
Accessories for DIN Abrasion Tester.
Abrasive Sheet
An abrasive sheet will abrade approximately 210 ... 250 mg from the mass of a comparison sample. This abrasion should be reduced to approximately 210 ... 220 mg by abrading a steel sample across the entire width of the delivered drum once or twice. The sheet can be used as long as the abrasive loss of a comparison rubber sample is less than 180 mg. It has to be replaced then.
Rubber Comparison Sample Sheet.
The rubber comparison sample sheet serves for the determination of the degree of abrasiveness in compliance with ISO 4649 (Formerly DIN 53516). It is produced of a special mixed rubber. Each plate has a dimension of approximately 186 mm x 186 mm and enables the production of about 100 comparison samples of a thickness of 8 mm.
Circular Cutting Unit
The circular cutting unit is used for the cutting of rubber samples with a diameter of 16 mm. The holder for the cutter is a morse taper No. 2 and can be fitted to a suitable drilling machine.
Replacement Cutter Spare cutter
For the circular cutting unit.
Increasing the sample pressure by 10 N
An additional weight of 10 N allows an increase of the pressure in steps by 12,5 / 15 / 17,5 and 20 N.
Drum Cleaning Unit
The drum cleaning unit consists of a set of brushes with holder, which is mounted on the rear of the sample holder and removes the dust from the abrasive sheet. A vacuum cleaner hose with a diameter of 40 mm can be connected to the brush holder.
Replacement Brushes
For the drum cleaning unit
Precision Balance
The precision balance with digital display, for the weighing of the sample, consists of a metal housing with a glass-protected weighing space. Weighing tray Ø 80 mm Weighing range: 0 ... 110 g Display step: 0,1 mg Reproducibility: ± 0,15 mg Linearity: ± 0,2 mg Mains connection: selectable 110/220 V, 50/60 Hz Dust Cover.
Dust cover
Consists of a transparent plastic cover.
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Taber Type Abrasion Tester
Invented by Taber in the early 1930’s, the Taber abrasion is an industry standard used in the wear and durability testing of ceramics, plastic, textiles, metals, leather, rubber, flooring, and painted, acquired and electro-plated surface, such testing aids in
1) Research & Development
2) Process ControlM
3) Quality Assurance
Accelerated wear test procedures using the Taber Abrasion are written into many of the test specifications of the American society for testing and materials (ASTM) and other standards organization.
This durable instrument repeatable determines the precise point at which a material, up to ½ " thick, breaks down or shows unacceptable wear.
The Abrasion Process
Samples of material to be tested are mounted on the abrasion's rotating turntable and subjected to the wearing action of two abrasive wheels applied at a specific pressure.
A unique "X" pattern of abrasion an exclusive Taber feature, is produced by the rotary rub-wear action of the wheels. Wear action occurs as the wheels by the rotating sample. The axis of rotation of the wheels is displaced from that of the turntable so that a sliding action is generated as they rotate, abrading the material. An area of 30square centimeters or over 4.5square inches is subjected to wear and a complete circle on the material surface is abraded at all angles of grain or weaves.
Evaluating Test Results
Visual End Point Method
Certain materials are best evaluated by observing the point at which they undergo a marked change in appearance or break down physically, using this method, the number of test cycles recorded on the counter is a wear index (rate of wear) of the sample. Painted, plated, or polished surfaces, paper, textiles and fabrics best lend themselves to this method.
Weight Loss Method
The weight loss method of evaluation is recommended when test results are to be compared with those of similar materials with about the same specific gravity. In this case, the Taber wear index is the loss of weight in milligrams per thousand cycles of abrasion for a lost performed under a specific set of conditions.
Volume Loss Method
If wear resistance of a material is compared with that of one having a different specific gravity, then a correction for this difference should be applied to the weight loss in order to obtain an accurate indication of the relative resistance to wear.
Depth Of Wear Method
It may be desirable after abrasion tests to measure the depth of wear. This can be done with a 125632 Optical Micrometer available as an accessory. The micrometer is precision calibrated in increments of one ten thousandths of an inch.
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