Product Name: Chain Couplings Model NO.: 3012-12022 Type: Rigid Coupling Material: Aluminum Structure: Rigid Speed: 7000r/M Bore Diameter: 9mm Torque: >80N.M Shaft Hole: 19-32 Standard Or Nonstandard: Standard Trademark: SYPT Transport Package: Plywood Case Specification: ISO, SGS, BV Origin: China HS Code: 8483600090 Product Description Chain Coupling SelectionIn general, the torque capacity of the coupling exceeds the normaltorque transmitted by the largest shaft size that the coupling canaccommodate.Therefore, select the smallest coupling which accommodates bothshaft diameters.Where there is reverse operation, shock loads, or any other severeoperating condition, it is recommended that the next coupling sizeup is selected.