Power HD TR-4 Micro Waterproof 2.2kg Metal Geared Servo for TRX-4

Brand: Power HD | SKU: TR-4

3+ in stock

5.0

3 reviews

$34.91

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Description

Please Note

Servos are powered by the ESC's output to the receiver. If you're using a higher-strength servo than the ESC can support (usually greater than 20kg), you may experience 'brown-outs' where the radio signal can be interrupted and cause erratic driving. This can be helped by plugging a Glitch Buster into the receiver smoothing the current delivery. However, in some cases, you may need to install an external BEC.

New from Power HD the TR-4! Having compatibility with high voltage 6V-8.4V, at 7.4V input the servo pulls up to 2.6kg-cm of torque at a speed of down to 0.10s. A long 35cm receiver wire and mini size of 22.5 x 12.5 x 24.0 mm ensures the servo is a direct fit in crawler Traxxas TRX-4 Crawler Range! The TR-4 servo comes with 25T metal spline and special gaskets making it waterproof for go-everywhere capabilities.

Specifications

Torque(4.8V): 1.8 kg-cm (25.0 oz/in)
Torque(6.0V): 2.2 kg-cm (30.6 oz/in)
Torque(7.4V): 2.6 kg-cm (36.1 oz/in)
Speed: 0.15 sec (4.8V) | 0.12 sec (6.0V) | 0.10 sec (7.4V)
Operating Voltage: 4.8 ~ 7.4 DC Volts
Weight: 16.0 g (0.56 oz)
Gear Type: Copper & Aluminium
Operating Temperature: -20~60c
Working frequency: 1520s / 50hz
Size: 22.5x12.5x24.0mm ( 0.89x0.49x0.94")

Power HD TR-4 Servo Specifications

Total Height (A) = 29mm
Body Width (B) = 22.8mm
Below Mount (C) = 15.5mm
Above Mount (D) = 11.5mm
Total Length (E) = 29.7mm
Total Width (F) = 12.8mm

Specifications

Servo

Servo Spline Count: 25Tooth
Total Length: 29.7mm
Total Width: 12.8mm
Bottom to Under Mount: 15.5mm
Top to Under Mount: 11.5mm
Total Height: 29mm
Body Length: 22.8mm
Rotational Degrees: 120° (Normal)
6V Sec/60 Degrees Seconds per 60 degrees of rotation: 0.12
Case Material: Plastic
6V Torque kg/cm Kilograms of torque at 25mm away from the center of the spline: 2.2
Gear Material: Metal
Waterproof Casing: Yes
Size Conventionally sized servo names: Sub Micro

Reviews (3)

Aug 31, 2025

3 months ago

Colin L

Verified Buyer

No review text provided.

Aug 08, 2025

4 months ago

Peter J

Verified Buyer

No review text provided.

Feb 23, 2025

9 months ago

Brendon S

Verified Buyer

Standard steering servo on my son's Traxxas trx4m bronco died within 4 days of carpet crawling, so new servo with metal gear set was ordered with hobbies direct and within 4 days we had it at our door. Came with new horns in great packaging and even better, (and not very common) is the servo wires were longer then standard making the job so much easier, plug and play and we were away. Thanks again hobbies direct. Great products at the best prices and service second to none.