本国际标准规定了封闭、精密、单螺旋和双螺旋的最低要求， 平行轴设计的一级和两级增速器和减速器，小齿轮转速为3000 min−1或 更大或25 m/s或更大的俯仰线速度，用于特殊用途。此类应用程序通常 需要在没有安装备用设备的情况下长时间连续运行，并且对系统至关重要 装置的持续运行。根据协议，本国际标准可用于其他服务。 本国际标准还规定了符合以下标准的齿轮评级方法: a） 齿轮精度  齿精度:ISO 1328-1:1995中给出的精度等级为4级或更高，适用于单齿距偏差fpt， 和总的累计螺距偏差Fp，  总螺旋偏差Fβ 小齿轮和车轮的螺旋线之间:精度等级4或更高，如中所示 ISO 1328-1:1995； b） 横向接触比范围:1,2<εα < 2,0; c） 重叠率εβ W 1,0； d） 螺旋角:5Uβ 铀35°; e） 小齿轮或齿轮的工作齿面:提供齿廓修正，以获得良好的共轭齿载荷 沿接触路径分布； f） 小齿轮或齿轮的工作齿面:根据需要进行修改，以补偿扭转和弯曲 偏转，必要时，对于节线速度超过100 m/s的齿轮，还包括热变形 扭曲； g） 齿轮润滑:纯矿物油，粘度等级VG-32或VG-46（见ISO 3448）； h） 齿轮齿的材料:质量MQ或更好，符合ISO 6336- 5:1996.

This International Standard specifies the minimum requirements for enclosed, precision, single and double helical, one- and two-stage speed increasers and reducers of parallel shaft design with pinion speeds of 3000 min−1 or greater, or pitch line velocities of 25 m/s or greater, for special purpose applications. Such applications will typically be required to operate continuously for extended periods, without installed spare equipment and are critical to the continued operation of the installation. By agreement this International Standard may be used for other services. This International Standard also specifies a method of rating gears which meet the following criteria: a) gear accuracy  teeth accuracy: accuracy grade 4 or better as given in ISO 1328-1:1995, for both single pitch deviation, fpt, and total cumulative pitch deviation, Fp,  total helix deviation Fβ between the helices of the pinion and wheel: accuracy grade 4 or better as given in ISO 1328-1:1995; b) range of the transverse contact ratios: 1,2 < εα < 2,0; c) overlap ratio εβ W 1,0; d) helix angle: 5 u β u 35°; e) working flanks of the pinion or gear: provided with profile modifications to obtain a good conjugate tooth load distribution along the path of contact; f) working flanks of pinion or gear: modified as necessary to compensate for both torsional and bending deflections and, when necessary for gears with pitch line velocities in excess of 100 m/s, also for thermal distortions; g) gear lubrication: straight mineral oil, viscosity grade VG-32 or VG-46 (see ISO 3448); h) material of the gear teeth: quality MQ or better, in accordance with ISO 6336-5:1996.