Page 7 of ANSI Roller Chains by U.S. Tsubaki

r super performance super-strong ansi chains conquer fatigue and space limitations super series chains have wider-waist link plates after heat-treating pitch holes are ball drifted pins are through hardened for greater shock resistance maximum allowable load is 25 to 30 percent higher super-h series chains have wider-waist and thicker link plates the same manufacturing techniques are used as in super series resulting in even higher maximum allowable loads ultra super series chains provide greater ultimate tensile strength and maximum allowable loads than any other roller chain from tsubaki when you spec ultra super series you can use chains up to two sizes smaller and that saves you money super series super-h series ultra super series 6

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