... Speed:1.6 1925RPM Direction of rotation:CW,CCW Ratio: 4~2418 PG25 Series Gearbox (25mmXLmm ) Note:1,Housing material,Zinc alloy. 2 ... ,Backlash,at no-load: ≤2° 3,Bearing at output: sleeve bearings ... 7,When the motors using at low speed,high gear ratio will cause gear motor ... .of teeth1215Pressure angle20°Hole diameter1.98, 2.28, 2.98Reduction ratio4,19,22.5,90,107 ...