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Request
a Quote for Bennewart Flex Tester Bennewart flex testing is intended to
determine the resistance of a component of material to cut growth during
repeated flexing. It can also be used to assess the effect of surface patterns
on crack initiation and growth. This test is especially applicable to the
outsoles of footwear, but may also be used with certain other flexible
components.
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The PSI Bennewart Flex Tester consists of a
drive unit comprising of an electric motor with pulleys and belts system to
give the desired speed to an eccentric and link mechanism to give an
oscillating movement to one of the two grips holding the two ends of test
specimens, the other grip being fixed.
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The oscillating grip has gun metal bushes, which
slides on two hardened and ground bearing steel rods to give it a long working
life. Each grip consists of swivable bases pivoted on ball bearings so that
the two ends of the test specimens are free to align themselves with the
natural contour of the specimen during flexing.
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The axis about which the grip bases oscillate
lies in the plane of their specimen holding face. A six digit pre-set
electronic digital counter counts the numbers of test cycles and also stops
the motor after pre-set numbers of test cycles.
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The apparatus is finished in grey hammertone
stoving painting and bright chrome / zinc plating to give it a corrosion
resistant finish.
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A cutting die for preparation of test specimen
from sheet and slitting punch with jig for making initial crack are available
as optional accessories.
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TECHNICAL DATA
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Number of test specimens tested 2 for full sole,
6 for cut test specimens
Angle of flexing 90°
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Diameter of bending mandrel 30 mm
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Frequency of operation 125 to 150 cycles/minute
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Motor ½ HP single-phase 230 volts AC
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Counter Six digit pre-set type digital type with
memory backup
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RELATED SPECIFICATIONS
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DIN 53543 1979 Testing of Semi Rigid
Polyurethane (PUR) Integral Cellular Materials Materials for Soles and Parts
of Shoes
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SATRA PM 161 Bennewart Flex Test Resistance to
Cut Growth on Flexing
IS 15298 (Part 1) -2002 Safety, Protective and Occupational Footwear for
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ISO 8782 (Part 1) - 1998) Professional Use Part 1
: Requirement and Test
Method BS EN 344 - 1993 Requirement and Test Methods for Safety, Protective,
and Occupational Footwear for Professional Use
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