Ross Flex Tester

Listing ID #3824965

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:¼ HP single-phase 230 volts AC
100 ± 5 cycles per minutesWidth of slit
Angle of bending of specimens:
:5 mm
Supply Type Manufacturer, Exporter, Supplier
Preferred Buyer Location All over the world

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Product Details

: 2.5 mm
Angle of bending of specimens :
62 mm Motor
: Measurement of Cut Growth of Rubber by the use of Ross Flexing Machine
Distance of slit from fixed end :
Methods of Test for Vulcanized Rubbers Part 16
90° Radius of bend
IS 3400 (Part 16) 1974 :
: Twelve
100 ± 5 cycles per minutes Width of slit
: 5 mm
Dimensions of test specimens :
Frequency of flexing :
: ¼ HP single-phase 230 volts AC
: Standards Method of Testing for Measurement of Cut Growth of Rubber by Ross Flexing machine
IS 10702 1985 :
Specification for Rubber Hawai Chappals ASTM D 1052 - 1985
150 x 25 x 6.3 mm Numbers of test specimens that can be tested simultaneously

STECH ENGINEERS Ross Flexing Machine allows one end of the test specimen to be clamped firmly to a holder arm while the pierced end is placed between two rollers that must permit a free bending movement of the test specimen during the test. During each cycle, the pierced area of the test specimen is bent freely over a 10mm ( 0.4in. ) diameter rod through a 90o angle. The machine operates at 1.7 + 0.08 Hz (100 + 5cpm ).

Introduction

A pierced strip test specimen is bent freely over a rod to a 90o angle and the cut length is measured at frequent intervals, to determine the cut growth rate. The cut is initiated by a special shaped piercing tool. The test gives an estimate of the ability of rubber vulcanized to resist crack growth of a pierced specimen when subjected to bend flexing. No exact correlation between these test results and service is implied due to the varied nature of service conditions.

Procedure

Measure and record the median thickness of the test specimen taken at three points across the width at the point of the cut. With the holder arm of the flexing machine in a horizontal position, clamp side by side the test specimens of the same making sure that the cuts are at the center point of the are of the rods. Lower the adjustable top rollers until they just touch the test specimen and lock in this position by means of the wing nuts. Permitting free travel of the test specimens between the rollers during the bending movement. Start the machine and record the number of cycles by the use of a counter. Make frequent observations, recording the number of cycles and the increase in cut length measured to the nearest 0.5mm for the purpose of determining the rate of increase in cut length. When observing cut growth, the holder arm shall be at an angle approximately 45o from the vertical. The test shall be continued until the cut length has increased 500%, that is, until the combined length of the cut and crack has increased to a total of 15.0mm ( 0.60in. ) or when 250kilocycles has been reached with slow cracking samples. In some cases the cut growth is not in a straight line as a continuation of the cut made by the piercing tool, and "star – shaped " cracking may develop. In this event, the cut growth shall be measured as the length of the longest continuous crack, regardless of its direction. When it is necessary to stop operation of the machine temporarily, the holder arm shall be in a horizontal position, so that the test specimens remain horizontal while not being flexed.

Report

	Sample identification,
	Specimen medium thickness,
	Test temperature if other than 23 + 2oC ( 73 + 3.6oF ), and
	The average number of cycles for each 100% increase in cut growth above the initial pierce of 2.5mm ( 0.10in. ) of the tested specimens, upto and including 500%, where possible.

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Company Details

Stech Engineers the company from India established in the year 1998, started Manufacturing Rubber Hardness Tester and gradually grown to manufacturing most of the Rubber Testing equipments. Within a short period the company has achieved a well reputation in the field of Rubber Testing equipments and a front leader in providing high Quality Testing Machines at very affordable price. We have well qualified technical professional and associates in our organization to serve with improving Quality Products, which meet all International Standards and Latest Methods for very convenient and easy Quality Assurance.