Power HD TR-4M 3.2kg HV Waterproof Metal Gear Micro Servo Blue TR-4M

The Power HD TR-4M is a compact waterproof micro digital servo designed for small-scale crawlers including the Traxxas TRX-4M, delivering up to 3.2kg-cm torque at 7.4V with fast 0.085 sec/60° response, metal gearing and a 25T output spline

Features

• Micro digital servo for compact RC crawler installations
• Designed for compatible Traxxas TRX-4M applications
• Waterproof construction for all-terrain use
• Up to 3.2kg-cm torque at 7.4V
• Fast 0.085 sec/60° response at 7.4V
• High-voltage operation from 4.8V to 7.4V
• Copper and aluminium metal gear train
• 25T output spline
• Lightweight plastic case
• JR-style receiver lead
• Blue finish

Specifications

• Brand: Power HD
• Model: TR-4M
• Product Type: Waterproof Micro Digital Servo
• Torque at 4.8V: 2.5kg-cm
• Torque at 6.0V: 3.0kg-cm
• Torque at 7.4V: 3.2kg-cm
• Speed at 4.8V: 0.11 sec/60°
• Speed at 6.0V: 0.095 sec/60°
• Speed at 7.4V: 0.085 sec/60°
• Operating Voltage: 4.8V to 7.4V
• Gear Material: Copper and Aluminium
• Output Spline: 25T
• Signal Type: Digital
• Working Frequency: 1520μs / 50Hz
• Receiver Lead: JR Style 180mm
• Operating Temperature: -10°C to 60°C
• Dimensions: 22.5 x 12.5 x 24.0mm
• Weight: 14g
• Case Material: Plastic
• Waterproof: Yes
• Manufacturer Part Number: TR-4M

Compatibility

• Traxxas TRX-4M
• Other compact RC crawler and surface applications matching the servo dimensions voltage range spline and connector requirements

Includes

• 1 x Power HD TR-4M Waterproof Micro Digital Servo Blue

FAQ

How much torque does the Power HD TR-4M produce? It produces 2.5kg-cm at 4.8V, 3.0kg-cm at 6.0V and up to 3.2kg-cm at 7.4V

What is the speed at 7.4V? Current independent specifications consistently list 0.085 sec/60° at 7.4V

Is the TR-4M waterproof? Yes, multiple current Power HD retailers describe the TR-4M as waterproof despite one retailer specification table incorrectly marking waterproof casing as No

What servo spline does the TR-4M use? Current specifications identify a 25T output spline

Is this the same servo as the older Power HD TR-4? No, the TR-4M is a newer lighter model with higher torque, faster speed and a shorter receiver lead than the original TR-4

Important Notes

• Confirm your receiver or BEC can provide the selected servo voltage before operating at 7.4V
• Check servo endpoints after installation to prevent binding or stalling
• Do not confuse this plastic-case TR-4M with the heavier brass-case TR-4M variant which has different torque speed dimensions and weight