This standard specifies the type, basic parameters, dimensions, technical requirements, test methods and inspection rules of base-type hard tooth surface reducers for cranes. This standard applies to three series of external meshing involute helical cylindrical gear reducers (hereinafter referred to as reducers), QY3D, QY4D and QY34D. This reducer is mainly used in various relevant mechanisms of cranes, and can also be used in transportation, metallurgy, Transmission mechanism of mechanical equipment in mining, chemical industry and light industry.
JB/T 10816-2007 Referenced Document
GB 5903-1995 Gear oils for industrial enclosed gear drives
GB/T 10095.1 Cylindrical gears—ISO system of flank tolerance classification—Part 1:Definitions and allowable values of deviations relevant to flanks of gear teeth*, 2022-10-12 Update
GB/T 11345-1989 Method for manual ultrasonic testing and classification of testing results for ferritic steel welds