HSR-2645CR Continuous Rotataion for Servo for Robot & Industrial Use. 72 rpm, 12kg/cm-7.4V 40.6x19.8x37.8mm, 53g

Control System: +Pulse Width Control 1500usec Neutral
Required Pulse: 3-5 Volt Peak to Peak Square Wave
Operating Voltage Range: 4.8-7.4 Volts
Operating Temperature Range: -20 to +60 Degree C (-4F to +140F)
Operating Speed (4.8V): 46 RPM at no load
Operating Speed (6.0V): 58 RPM at no load
Operating Speed (7.4V): 72 RPM at no load
Operating Torque (4.8V): 111.09 oz-in (8 kg-cm)
Operating Torque (6.0V): 138.87 oz-in (10 kg-cm)
Operating Torque (7.4V): 166.64 oz-in (12 kg-cm)
Continuous Rotation Modifiable: Completed (Stock)
Direction: Clockwise/Pulse Traveling 1500 to 1900usec
Motor Type: Carbon Brushed Cored Motor
Potentiometer Drive: No Potentiometer
Bearing Type: Dual Ball Bearings
Gear Type: Metal Gears
Dimensions: 1.59" x 0.77"x 1.48" (40.6 x 19.8 x 37.8mm)
Weight: 1.87oz (53g)