6 arcmin eighty around flange Economical planetary reducer gearbox 3:1 to 10:1 for NEMA34 stepper motor input shaft 14mm PLEASE READ THE FOLLOWING NOTICE BEFORE ORDER: 1st:Reduction Ratio The reduction ratio of the planetary reducer you ordered is: 1 level reducer ratio: 3:1,4:1,5:1,7:1,10:1 You should buy directly. Please go away me message for the discount ratio of the planetary reducer after order! Offered reduction Ratio: 1 level reducer ratio: 3:1,4:1,5:1,7:1,10:1 2 degree reducer ratio: 15:1,20:1,25:1,30:1,35:1,40:1,50:1,70:1,100:1 2nd:Input Size We will ship the planetary reducer because the traditional size as follows: Frame Shaft diameter of motor Rabbet diagonal Screw hole distance 80mm 14mm 73mm 98.4mm If any query on the dimension of the planetary reducer, please write me the dimension drawing of your motor. We offer customize provider on your motor and can assist you desire the suitable planetary reducer for your motor. 3rd:Parameters We can offer higher precision version corresponding to backlash three arc-min( P1 grade), 1 arc-min (P0 grade);If you've inquiry to customise the precision ,input and output dimensions, discount ratio please write me Here is the parameters of the planetary reducer: