... Gearbox (25mmXLmm ) Note:1,Housing material,Zinc alloy. 2,Backlash,at no-load: ≤2° 3,Bearing at output: sleeve bearings 4,Radial ... MOTOR INSTALLATLON Module0.30.3No.of teeth1215Pressure angle20°Hole diameter1.98, 2.28, 2.98Reduction ratio4,19,22.5,90,107,304,361 ...