Patent ID: 7354346

Claim:
A torque limiter for use in office appliances in an environment having a high temperature and a high humidity, having an inner ring fitted inside an outer member and a torque transmission member is interposed between said inner ring and said outer member, whereby a predetermined torque is generated by a friction generated between said inner ring and said torque transmission member, when said inner ring and said outer member rotate relatively to each other containing a lubricating oil to be impregnated with said members on each other, said lubricating oil consisting essentially of a base oil, an emulsifier added to said base oil And a wear resistant agent, wherein said base oil consists of synthetic saturated hydrocarbon oil having a kinematic viscosity of 500 to 1200 mm.sup.2/s at 40. degree. C., wherein said emulsifier is added to said base oil of said lubricating oil as a solution dissolved in a solvent not generating a chemical attacking property.