Roller Chain - Tsubaki

Introduction toTsubaki Roller ChainExplanation of Terms1. ANSI Standard Minimum Tensile Strength (Tensile Breakage Strength)This is the Minimum Tensile Strength determined by ANSI. If a roller chain breaks from atensile load below this value, then it does not surpass ANSI standards. In the case ofmulti-strand roller chain, the single strand value is multiplied by the number of strands.2. Average Tensile StrengthThis is a fracture load reading obtained after a long period of actual tensile strength testingof a large number of chain strands. Of course, when any given strand of roller chainfractures, this value may be higher or lower, so it does not represent a guaranteed value.This value differs depending on the manufacturer.3. Minimum Tensile StrengthThis is a minimum value determined by statistical processing at TSUBAKI. If any rollerchain fractures by a tensile load below this value, then it does not surpass the standards.This value differs depending on the manufacturer.Drive ChainMinimum ANSI StandardTensile StrengthTsubaki Minimum Tensile StrengthAve. Tensile StrengthFrequencyTensile StrengthFig. 1 Relationship between three tensile strengths.4. Tensile Strength Testing MethodAs shown in Fig. 2, roller chain with over five links is fixed at both ends by clevises and isstretched until fracture occurs. The type of fracture is indicated by breakage of the rollerchain or failure of its parts (Fig. 3).Fig. 2 Tensile strength testFig. 3 Shape of fractureA-5