机车减速机变频机车齿轮箱按牵引机车的动力源分为：SNRJXK系列变频机车车轴齿轮箱、SNRJC系列内燃机车车轴齿轮箱和SNRJR系列电容机车车轴齿轮箱（主要型号：SNRJC2T/SNRJC5T/SNRJC10T/SNRJC15T/SNRJC25T/SNRJC30T/SNRJC35T/SNRJC40T/SNRJC45T-20.83/SNRJC55T-24.137/SNRJC55T-28.16/SNR
