Feature: 1. The motors are all made of metal gears, adopting high cost 2 ended ball bearing structure, excellent workmanship, and durable. 2. The basic characteristic of the geared motor is that the lower the speed, the greater the torsion, the diameter of the output shaft is 8mm, and the force is more stable. 3. With 2mm thick zinc alloy gear casing box, geared motor can be more powerfully protected.The direction of the output shaft of the gear casing is perpendicular to the motor shaft. 4. This worm gear motor is self locking, that is, when the motor is without electricity, the output shaft cannot rotate. 5. Wide range of applications, DC worm gear motor are widely used in household appliances, audio visual products, office equipment, massage and health care systems. Specification: Item Type: DC Motor Material: Copper,Zinc Alloy Model: 5840-555 Material: Copper, Zinc Alloy Purpose: Industrial Drive Device Output Shaft Size (diameter x Length):approx. 8 x 13mm / 0.3 x 0.5in Size (Length x Width): Approx.58 x 40mm / 2.3 x 1.6in Rated voltage DC12V parameter table current no load 0.5A load 1.2A locked rotor 4.7A Reduction ratio (change ratio) 17 31 50 100 200 290 500 No load speed rpm 470 260 160 80 40 27 12 Rated torsion kg.cm 2.5 4.5 7.3 14.5 29 42 60 Rated speed rpm 380 200 130 60 30 20 12 Maximum torsion Kg.cm 4.3 8 12.5 25 51 70 70 Rated voltage DC24V parameter table Current no load 0.25A Rated load 1.5A Locked rotor 5.2A Reduction ratio (change ratio) 17 31 50 100 200 290 500 No load speed rpm 470 260 160 80 40 27 16 Rated torsion kg.cm 8 9.5 15 30 40 50 60 Rated speed rpm 380 200 130 60 30 20 12 Maximum torsion Kg.cm 17 31 50 50 70 70 70 . Package List: 1 x DC Motor Note: Because the locked rotor torsion of this motor is too large, during use, do not frequently reverse and reverse, do not forcefully lock the rotor, and cannot be used for a long time under a torsion higher than 40kg.cm, and cannot exceed 60kg.cm in short‑term use applications; Otherwise, the all metal gear set structure adopted immediately will still exceed the torsion limit of the material and cause damage to the reduction box gear.