Rubber Testing Equipment

IRHD hardness tester is used to determine the hardness characteristics of elastomeric materials employing in the rubber. Standard features includes:

• Range of hardness 30 to 85
• IRHD diameter in indention tip 2. 50mm
• Contact force 0. 30 N
• Indenting force 5. 40 N
• Electric supply 230 volt single-phase AC

Related Standard:

• Is 3400 (part 2)-1980 methods of test for vulcanized rubber hardness

One of the methods for determining the abrasion resistance of elastomers is by a rotating drum abrasion tester. In this test the elastomer under test is abraded against an abrading surface mounted over a rotating drum. The abrading surface has a specified abrading power. The test specimen, which is in form of a button, is held against it under a fixed load. The abrading surface is made to rub against the test specimen by rotating the drum at a fixed speed, the test specimen being meanwhile made to move along the axis of the drum.

Related standards:
IS 3400 (part 3) ­ 1987:  Methods of test for vulcanised rubbers
part 3 : abrasion resistance using a rotating cylindrical drum device
DIN 53516: Testing of rubber and elastomers -  determination of abrasion resistance
ISO 4649 ­ 1985: Rubber ­ determination of abrasion resistance using a rotating cylindrical drum device

The resistance to abrasion of sole leather may be determined with the help of a drum type abrader (similar to NBS Abrader). In this test, an abrasive cloth strip of a specified grit is fixed over the circumference of a drum, which is rotated at a specified speed. The test specimen, in shape of a rectangular strip, is held on a metallic bar located above the drum such that its longer axis is perpendicular to the axis of the drum. When the metallic bar is pressed against the drum, the test specimen gets abraded. The number of revolutions needed to produce a depth of abrasion of 2.5 mm is determined and compared against that needed to produce a depth of abrasion of 2.5 mm in a standard rubber compound to obtain the abrasive index of the leather sample under test.