De Mattia Flex Tester
Product Details:

• The ability of rubber products to withstand repeated flexing without developing cracks is of prime importance where such products are used in conditions undergoing repeated flexing.
• Flexing endurance of rubber products is determined by simulating in the laboratory the action of flexing repeatedly under standard conditions of speed, mode, and degree of flexing.
  
• One of the accepted procedures for determination of flexing resistance makes use of a De Mattia flexing tester. This tester provides useful information about the resistance of compounds of vulcanized rubber to flex cracking when subjected to flexing. Cracks develop in that part of the surface where stresses are set up during flexing, or if that part of the surface initially contains a crack, cause this crack to extend in a direction perpendicular to the stress.
• The PSI De Mattia Flex Tester consists of a set of grips to hold test specimens in two tiers with their holding faces lying in the same vertical plane. The flexing and unflexing action is provided by holding one end of the test specimens in a fixed grip and the other end in a reciprocating grip.
• The set of grips has two fixed grips and one large reciprocating grip positioned between them in order to flex half of the test specimens while the other half are being unflexed. The reciprocating grip is fitted with gunmetal bushes, which slide on hardened and ground rods made of high carbon steel. The reciprocating motion is provided by an eccentric and linkage mechanism driven by an electric motor through a V-belt and pulleys.
  
• A six digit electronic counter with reset and memory backup is provided for indicating the number of test cycles undergone.
• The equipment is built on a rigid metallic base plate and finished in grey hammertone stoving painting and bright chrome / zinc plating to give it a corrosion resistant finish.
  
• The standard model of the tester is designed to test up to six test specimens at one time. A special model capable of testing up to twelve