The Bharat Group - Abrasion Tester

The abrasion effect of packaging materials on upper materials can also be tested on this machine. Using a small profiled rubber pad in place of the felt pad, samples can be tested for this effect.
Operation of the machine is simple. The sample is placed on the test surface and clamped using clamps provided. Pretension can be affected by adjustment of the knob in conjunction with the percentage scale on the testing table of the machine. A cycle counter is fitted to the machine causing the machine to stop when the pre-determined amount is reached. The square-rubbing element is inserted on the machined holder on the end of the rubbing head, which is lowered to the surface of the test sample.
Technical Data

• Cycle counter with auto stop.
• Easy adjustment for stretching the material
• Easy clamping to hold the material
• Finger, of mass 500 g, removable but able to be fixed firmly, with a base of 15 mm × 15 mm, a device for attaching pieces of wool felt pads to the base, an additional mass of 500 g and a means of guiding the finger when fully loaded (total mass 1 kg) flat on the test piece; (upto 1.5 kg, 2.0 kg, 2.5 kg load can be maintained) motor, gear box, crank and connecting mechanism driving the carriage to and from, with an amplitude of 35 mm and a frequency of (40 ± 2) cycles/min.

In Din method of determine abrasion resistance of vulcanized natural or synthetic, a cylindrical rubber test specimen is abraded against an abrasive surface mounted on a rotating cylindrical drum in such a manner that abrasion takes place on one of the flat ends of the test specimen which is held against the abrasive surface under a specified load while being traversed across it. The ratio of the volume loss of a standard rubber to the volume loss of the test rubber measured under the same conditions, expressed as a percentage, gives the abrasion resistance index of the rubber under test.
Din Abrasion Tester is designed to determine abrasion resistance index of natural and synthetic rubber in accordance with the above principle. It consists of test specimen holder with a cylindrical opening adjustable between 15.5 to 16.3 mm to clamp the test specimen with an arrangement to adjust the length of test specimen protruding out. The holder is mounted by a screw mechanism along a length of a rotating drum on which the abrasive cloth is fixed. The movement to the screw mechanism and drum is given by an electric motor, gearbox and chain mechanism to give the specified speed of rotation to the drum and the specified lateral movement to the test specimen holder. The swivel arm and test specimen holder are so disposed that the test specimen is pressed against the drum under the specified load with its centre axis at an inclination of 3 degree to the perpendicular in the direction of rotation and placed above the longitudinal axis of drum. A rack and pinion arrangement to rotate the test specimen about its axis during the test (whenever desired) is also provided.
The abrasive cloth is firmly fixed to the drum using a suitable peel able adhesive with the ends of the abrasive cloth butt jointed together. The equipment is provided with limit switches which, in addition of giving over travel safety to the movement of test holder by preventing the lower edge of the test specimen holder to touch the abrasive cloth.
The equipment is built on rigid steel base and finished in grey metallic and bright chrome / zinc plating to give it a corrosion resistant finish. Moulding die, rotary type cutting die(hollow drill) for preparing test specimens and extra abrasive cloth are available as optional accessories.