MaterialDialFinishingPerformanceLogoPacking Home > Technology > Performance     Performance Tests Dial Turning Test Safety locks produced by SINOX are combination locks. The presence of indexing spring that is in contact with the groove between dials when the dial turns exerts pressing pressure to make sure each position is distinctly felt when the dial turns. In turning a dial, the number of the combination is solidly located without turning the other dials to render the open/close state of the lock readily observed. Operation in the dark: Some of the SINOX products can be operated in the dark (AL-100/PL-977/PL-876/XL series). This function allows operation of the lock without actually looking at it (in places where there is no light or when the user is visually impaired). It works by the design of 90o angle of groove surface between dial numbers 5 and 6 so that when the indexing spring is in contact with the groove (the "0" position), the dial is locked in one direction and turns in the other direction only, thus forcing positioning and number locating. Tension / Torque Test: (ultrasonic welding, riveted cable, riveting strength) (1) Drop test : Locks with riveted bodies (sides A & B) are subjected to drop test by CNS standards to check if the riveting strength is sufficient. The test entails letting the sample fall freely from a height of 150cm and testing each sample eight times. After testing, check to see if sides A & B fall apart, or if any part breaks up and if the lock still works normally. (2) Tension test : Riveted cable is subjected to tension tester to examine if its tensile strength conforms to SINOX/customer requirement; the first-piece after inspection is tested to see if its tensile strength conforms to requirement. (3) Torque test : Torque wrench is applied to test if ultrasonically welded lock is uniformly welded and if the welding strength is sufficient. The test is done by placing a fixture into the closed end of the cable head and then securing the torque wrench and fixture; twisting the wrench until the torque reaches the standard value or until the product breaks, and then examining whether the torque value thus obtained conforms to SINOX criteria. Reliability Tests (1) Dial cycle test: This test is performed for all Samsonite products to check if any single dial of the lock would take other dials with it when it turns (this is not supposed to occur). One out of every 5000 pcs of products is tested by turning it 5,000 times with a special tester. None of the dials of the product may take other dials with it before, during and after testing when it turns. (2) Cross cut test: This test is performed on products with surface treatment (varnished/electroplated/electro-deposited) to check if the surface treatment has sufficient adhesion or shows brittleness. (3) Tape test: This test is required for products with surface treatment (varnished/electroplated/electro-deposited) or marking (with customer or specific logo), in which 3M testing tape is used to test if the surface treatment or marking has sufficient adhesion. (4) Alcohol test: This test is required for products with marking (with customer or specific logo) to check if the marking breaks down or the inking becomes smudged when in contact with solvent (5) Environmental test: This test subjects pressure-cast material, such as lock body and hook to the temperature of 140-160 continuously for 20 minutes to see if the material has bubbles, deforms, or undergoes other changes that affect product quality after baking under high temperature. Quality Assurance Test All SINOX combination locks offer reliable quality. Each and every piece of SINOX product is subjected to complete functional inspection in the process of manufacturing. The exterior and customer logo of each product conform to international standard (Pantone No.) or sample tested by the customer. SINOX's QA also conducts random sampling inspection according to MIL-STD-150E at AQL 1.0 for function and 2.5 for appearance to make sure all products are in good working condition when shipped.