The Spektrum SPMSS9120BL S9120BL HV brushless servo with 1454 oz-in torque @ 8.4V and 15T spline output is engineered for 1/5-scale off-road RC platforms that demand uncompromising torque, durability, and precision. Designed to thrive in punishing environments, this high-performance surface servo combines race-proven reliability with cutting-edge brushless motor technology. Whether you're bashing through dunes or competing on the track, the S9120BL delivers the control authority needed to dominate large-scale terrain with confidence.
Key features of the Spektrum SPMSS9120BL S9120BL servo
- 1454 oz-in torque @ 8.4V – maximum force for steering and throttle control in 1/5-scale RC vehicles
- Metal gears and aluminum top plate – reinforced durability for high-impact off-road conditions
- Brushless motor with <1µs deadband – ultra-precise input response and long-term reliability
- 6" detachable connector – thicker 18AWG wire for improved power delivery and serviceability
- Redesigned bearing housing – enhanced gear pin support for smoother operation under load
How does the Spektrum SPMSS9120BL servo handle extreme torque demands?
At the heart of the Spektrum SPMSS9120BL S9120BL HV brushless servo with 1454 oz-in torque @ 8.4V and 15T spline output is a newly designed brushless motor that delivers more power than any previous Spektrum servo. Rated at 1173 oz-in @ 6V, 1209 oz-in @ 7.4V, and peaking at 1454 oz-in @ 8.4V, this servo is built to move massive tires and heavy linkages with ease. The 15T spline output ensures compatibility with large-scale servo horns, while the <1µs deadband guarantees precise response to every input—critical for competitive driving and technical terrain.
What makes this servo ideal for off-road RC platforms?
The Spektrum SPMSS9120BL 1/5-scale surface servo with metal gears, aluminum top plate, and 6" detachable connector is purpose-built for off-road abuse. Its metal geartrain resists wear and impact, while the aluminum top plate and redesigned bearing housing provide structural reinforcement where it matters most. The servo’s stealth black casing not only looks sharp but also houses components designed to withstand vibration, dust, and shock. Whether installed in a buggy, crawler, or large-scale truck, the S9120BL offers the ruggedness needed to perform in unpredictable environments.
How does the brushless motor improve performance?
Inside the S9120BL servo with brushless motor, <1µs deadband, and 178.6g mass for large-scale RC vehicles, the brushless motor architecture delivers smoother power delivery, higher efficiency, and longer lifespan compared to brushed alternatives. This design reduces internal friction and heat buildup, allowing the servo to maintain consistent torque under sustained load. Combined with the ultra-low deadband, drivers benefit from immediate and accurate response—essential for navigating tight corners, steep climbs, and high-speed straights.
Is the Spektrum SPMSS9120BL servo easy to install and maintain?
Yes. The Spektrum SPMSS9120BL with 6.3oz weight, 62.7mm length, and 6.0–8.4V HV operating range for off-road platforms features a 6-inch detachable connector with thicker 18AWG wiring, making installation and maintenance straightforward. The servo’s compact dimensions—62.7mm length, 30mm width, and 27.2mm height—fit standard large-scale mounts, while the 178.6g mass balances strength and agility. With a wide HV operating range, it’s compatible with 2S to 3S LiPo systems, giving builders flexibility across platforms and power setups.
What durability upgrades set this servo apart?
The Spektrum SPMSS9120BL high-torque servo with race-proven performance and redesigned bearing housing introduces several structural enhancements. The gear pin supports have been reinforced to reduce flex and wear, while the bearing housing has been re-engineered for smoother gear rotation under load. These upgrades contribute to the servo’s race-proven reputation, having powered podium finishes at the 2020 1/5 Worlds Buggy Class. For drivers who push their vehicles to the limit, these refinements translate to longer service life and consistent performance.
Is this servo suitable for competitive and recreational use?
Absolutely. The High-performance surface servo with 1173 oz-in @ 6V, 1209 oz-in @ 7.4V, and stealth black casing is designed for both racing and bashing. Its torque output and precision make it ideal for competitive setups, while its durability and ease of use cater to recreational drivers who want reliable control in demanding conditions. Whether you're tuning for lap times or trail adventures, the S9120BL delivers the responsiveness and strength needed to stay in control.
Buy Spektrum SPMSS9120BL S9120BL servo for 1/5-scale off-road RC vehicles, buggies, and large-scale crawlers.
Brand, Model and Product Type
- Brand – Spektrum
- Model – SPMSS9120BL
- Product Type – Spektrum SPMSS9120BL S9120BL HV brushless servo with 1454 oz-in torque @ 8.4V and 15T spline output, Spektrum 1/5-scale surface servo with metal gears, aluminum top plate, and 6" detachable connector, Spektrum high-torque servo with race-proven performance and redesigned bearing housing, Spektrum SPMSS9120BL with 6.3oz weight, 62.7mm length, and 6.0–8.4V HV operating range for off-road platforms, High-performance surface servo with 1173 oz-in @ 6V, 1209 oz-in @ 7.4V, and stealth black casing
Dimensions
- Product length – 6.27 cm, sized for large-scale RC platforms requiring high torque output
- Product width – 3.0 cm, compact enough for standard 1/5-scale servo trays
- Product height – 2.72 cm, low-profile design for chassis clearance and gear protection
- Product weight – 6.3 oz (178.6 g), balanced for strength and responsiveness in off-road conditions
Torque and Voltage
- Maximum torque @ 6.0V – 1173 oz-in (84.47 kg-cm), suitable for heavy-duty steering and throttle control
- Maximum torque @ 7.4V – 1209 oz-in (87.06 kg-cm), optimized for mid-voltage performance
- Maximum torque @ 8.4V – 1453.5 oz-in (104.66 kg-cm), peak output for extreme terrain and large-scale buggies
- Operating voltage – 6.0V to 8.4V HV range, compatible with 2S and 3S LiPo systems
Motor and Response
- Motor type – Brushless motor for increased power, efficiency, and long-term reliability
- Deadband – Less than 1 microsecond, ensures ultra-precise input response and control accuracy
Construction and Materials
- Gear type – Metal gears for high-impact durability and long service life
- Top plate – CNC-machined aluminum top plate for structural reinforcement and heat dissipation
- Bearing support – Redesigned bearing housing for smoother gear rotation and improved pin stability
- Casing – Stealth black finish for a sleek, race-ready appearance
Connectivity and Installation
- Connector type – 6-inch (152mm) detachable connector with thicker 18AWG wire for improved current handling
- Spline count – 15T spline output compatible with large-scale servo horns
Application and Compatibility
- Application – Designed for 1/5-scale off-road RC vehicles, buggies, and large-scale crawlers
- Servo size category – Large scale, ideal for high-torque surface platforms
What's in the Box
- 1x Spektrum S9120BL HV brushless metal gear surface servo
