1Pcs/lot 57mm Planetary Gearbox Ratio 3:1 4:1 5:1 10:1 for Nema23 Stepper Motor Shaft diameter 6.35mm or 8mm Gearbox only! (gear ratio: 3:1-10:1. with connector pinion, but with out motor.)The video shows connect the gearbox to motor with the pinion.Feature Description:Low noiseSpeed adjustableLong existence characteristicsHigh torqueGearing Arrangement: PlanetaryOrigin: Mainland ChinaModel Number: PLANETARY 57XG-3/-10Output Torque: Max load 12N.m, rated load 6N.mInput Speed: Max velocity 3000rpm, variableOutput Speed: variable as diversified ratioGear ratio: 3:1 4:1 5:1 10:1Backlash: Less than or equivalent to fifteen arcminThe specification of 57mm Geared Stepper Motor Planetary gearbox:Gear ratio 3:1-10:1 belong to 1-stage:The dimension of nema 23 planetary gearbox:The suitable enter shaft of motor:should with unmarried flat type and 6.35mm or 8mm diameter*9mm length(Including pad height).Send with the pinion to hook up with the motor:Assembled with stepper motor nema 23:Application of geared stepper motor :Geared stepper motor can be utilized in such locations as industrial transmission control, powder packaging machine, CD-ROM reader, winding machine, printing machine, cutting machine, engraving machines, printers, plotters, robotics and other related products.Planetary Gearbox *1