PTK 42KG 8850 30KG 8852 High Torque Stainless Steel/Metal Gear Waterproof Digital RC Servo for Robot Fixed Wing Car and Aircraft Model Specification：Model: PTK 8850 42KG RC Servo Gear Material: Stainless Steel Gear Case Material: CNC Case Operating Temperature: -15°C~+60°C Operating Travel: 180° (±10°) Refresh Rate: 333Hz Net Weight: 70.2g Pulse Width: 500 To 2500 μSec PCB: Digital Dead Band: 2 μp Neutral Position: 1500uS Size: 40*20*36.8mm Bearing: Double Ball Bearing Operating Voltage: 5V-8.4V Wire: JR 250MM Operating Current: 7.4V/150mA Programmable: Yes Operating Speed @ 5.0V: 0.145sec/60° Operating Speed @ 6.0V: 0.117sec/60° Operating Speed @ 7.4V: 0.095sec/60° Operating Speed @ 8.4V: 0.086sec/60° Stall Torque @ 5.0V: 26kg-cm Stall Torque @ 6.0V: 30kg-cm Stall Torque @ 7.4V: 38kg-cm Stall Torque @ 8.4V: 42kg-cm Model: PTK 8852 30KG RC Servo Gear Material: Metal Gear Case Material: CNC Case Operating Temperature: -15°C ~ +60°C Operating Travel: 180° (±10°) Refresh Rate: 333Hz Net Weight: 66.4g Pulse Width: 500 to 2500 µSec PCB: Digital Dead Band: 2 µs Neutral Position: 1500 µs Size: 40*20*36.8mm Bearing: Double Ball Bearing Operating Voltage: 5V-8.4V Wire: JR 250MM Operating Current: 7.4V/150mA Programmable: Yes Operating Speed @ 5.0V: 0.085sec/60° Operating Speed @ 6.0V: 0.072sec/60° Operating Speed @ 7.4V: 0.059sec/60° Operating Speed @ 8.4V: 0.054sec/60° Stall Torque @ 5.0V: 20 kg-cm Stall Torque @ 6.0V: 25 kg-cm Stall Torque @ 7.4V: 28 kg-cm Stall Torque @ 8.4V: 30 kg-cm Package included: 1x RC Servo