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Power HD

Power HD Red/Black B7-RS Revolution Low-Profile 13kg 7.4V HV Brushless Metal Geared Servo

  • Brushless

Part no. B7-RS

Sold out5.0
2 reviews
1 / 2
1 / 2

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$144.99

or 4 fortnightly payments of $36.25 with afterpay or PayPal, or zip

Power HD B7-RS low-profile HV brushless servo — 13kg torque at 7.4V, titanium/steel gears, only 48g.

  • 13kg-cm torque at 7.4V HV
  • Ultra-fast 0.055 sec/60° response
  • Titanium & steel gears for durability
  • Low-profile aluminium case — 48g
  • SANWA SSR Mode compatible

In stock now: similar

Ready to send today if you order before 1pm.

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Overview

Weighing only 48g, the low-profile B7-RS has improved precision and speed over similar servos. The titanium and steel gears deliver great torque while keeping weight to a minimum.

Servos are powered by the ESC's output to the receiver. If you are 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 to smooth current delivery. In some cases, an external BEC may also be required.

Features

  • 0.055 sec/60° @ 7.4V
  • Aluminium case
  • Low-profile and light-weight
  • Titanium & steel gears
  • 2 x metal ball bearings
  • Compatible with SANWA SSR Mode

In the box

  • 1x B7-RS Low-Profile 13kg 7.4V HV Servo
  • 1x Hardware Set

Specifications

Torque (6.0V)10kg-cm (138.8 oz/in)
Torque (7.4V)13kg-cm (180.5 oz/in)
Speed0.65 sec (6V) / 0.55 sec (7V)
Operating Voltage6–8.4V
Weight48g (1.69oz)
Bearing Type2 x Ball
Gear TypeTitanium & Steel
Operating Temperature-20°C ~ 60°C
Working Frequency1520µs / 333Hz
Size41.0 x 20.0 x 26.4 mm (1.61 x 0.79 x 1.04 in)
Total Height (A)31.2mm
Body Width (B)41.2mm
Below Mount (C)16.8mm
Above Mount (D)9.59mm
Total Length (E)54.8mm
Total Width (F)20mm

Servo

Servo
SizeConventionally sized servo namesLow Profile
Gear MaterialTitanium & Steel
Servo Spline Count25Tooth
Waterproof CasingSplash Proof
Case MaterialAluminium
Height (A)31.2mm
Body Length (B)41.2mm
Bottom to Under Mount (C)16.8mm
Top to Under Mount (D)9.59mm
Length (E)54.8mm
Width (F)20mm
Drive Motor TypeBrushless
Rotational Degrees120° (Normal)
6V Torque kg/cmKilograms of torque at 25mm away from the center of the spline13
6V Sec/60 DegreesSeconds per 60 degrees of rotation0.065
Signal TypeDigital

Reviews (2)

5.0

Based on 2 reviews

  • 5 stars2
  • 4 stars0
  • 3 stars0
  • 2 stars0
  • 1 star0

  • Chris W

    Verified buyer

    27 Sept 2026

  • Steven V

    Verified buyer

    2 Nov 2025

    Excellent, fast and strong servo

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