Power HD TR-4 Waterproof Micro Metal Gear Servo TRX-4 PHD-TR-4

The Power HD TR-4 is a waterproof micro digital servo designed as a direct-fit replacement for the auxiliary shift and differential-lock servos used in compatible Traxxas TRX-4 crawlers, delivering up to 2.6kg-cm torque at 7.4V with a metal gear train and 25T output spline

Features

• Waterproof micro digital servo for crawler applications
• Designed as a replacement for compatible Traxxas TRX-4 auxiliary servos
• Suitable for transmission shifting and differential-lock functions
• Up to 2.6kg-cm torque at 7.4V
• Fast 0.10 sec/60° response at 7.4V
• 4.8V to 7.4V operating range
• Metal gear train using copper and aluminium gears
• 25T metal output spline
• Special sealing gaskets provide waterproof protection
• Long 350mm receiver lead simplifies routing through crawler chassis

Specifications

• Brand: Power HD
• Model: TR-4
• Product Type: Waterproof Micro Digital Servo
• Torque at 4.8V: 1.8kg-cm
• Torque at 6.0V: 2.2kg-cm
• Torque at 7.4V: 2.6kg-cm
• Speed at 4.8V: 0.15 sec/60°
• Speed at 6.0V: 0.12 sec/60°
• Speed at 7.4V: 0.10 sec/60°
• Operating Voltage: 4.8V to 7.4V
• Gear Type: Copper and Aluminium
• Output Spline: 25T
• Working Frequency: 1520μs / 50Hz
• Receiver Lead Length: 350mm
• Operating Temperature: -20°C to 60°C
• Dimensions: 22.5 x 12.5 x 24.0mm
• Weight: 16g
• Manufacturer Part Number: PHD-TR-4

Compatibility

• Traxxas TRX-4 transmission shift servo applications
• Traxxas TRX-4 differential-lock servo applications
• Compatible applications replacing the Traxxas 2065-size micro servo

Includes

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

FAQ

Is the Power HD TR-4 the main steering servo for a TRX-4? No, it is primarily designed as a replacement for the smaller auxiliary servos used for the TRX-4 transmission shift and differential-lock functions rather than the main steering servo

How much torque does the TR-4 produce? It produces 1.8kg-cm at 4.8V, 2.2kg-cm at 6.0V and up to 2.6kg-cm at 7.4V

What servo spline does the TR-4 use? The servo uses a 25T metal output spline

Is the Power HD TR-4 waterproof? Yes, current product specifications describe the TR-4 as waterproof and fitted with sealing gaskets for crawler use in wet conditions

Important Notes

• Confirm your receiver or BEC output voltage before operating the servo at 7.4V
• This servo should not be confused with the newer Power HD TR-4M which has different torque speed weight and wiring specifications
• Check linkage endpoints after installation to prevent the servo from stalling against the transmission or differential-lock mechanism