Delivery Included
1 Year Warranty
The Spektrum P-SPMSS6400 S6400 HV servo with 266 oz-in torque, 0.06 sec speed, and 25T output spline is a precision-engineered upgrade for 1/10 scale RC buggies, trucks, crawlers, and RTR platforms. Designed to deliver high-speed response and robust torque in a compact footprint, this low-profile digital servo combines a brushed motor with a hardened gear train and a heat-dissipating aluminum case. Whether you're racing on tight tracks, crawling through technical terrain, or bashing across unpredictable surfaces, the Spektrum P-SPMSS6400 offers the mechanical strength and control fidelity needed to elevate your driving experience. Its stealth black finish and space-saving design make it a standout choice for builders who demand performance without compromise.
Key features of the Spektrum P-SPMSS6400 S6400 HV servo
- 25T output spline – compatible with standard servo arms for secure linkage
- Stealth black anodized aluminum case – enhances heat dissipation and structural durability
- Dual output shaft bearings – ensures smooth rotation and consistent torque delivery
- 7075 anodized gear train – precision-machined for tight mesh and minimal wear
- Steel internal gears – engineered for long-term reliability under high-load conditions
- Removable wire harness – includes 2-inch extension lead for flexible installation
- Robust aluminum mounting tabs – secure the servo under extreme vibration and impact
How does the 25T output spline improve compatibility and control?
The Spektrum P-SPMSS6400 low-profile digital servo for 1/10 scale buggies, trucks, crawlers, and RTR upgrades features a 25-tooth output spline that aligns with standard servo arms used across most surface RC platforms. This ensures a secure mechanical connection between the servo and steering or throttle linkages, minimizing slippage and maximizing control accuracy. The 25T spline also supports a wide range of aftermarket accessories, giving builders flexibility in customizing their setups. By upgrading from the previous 24T design, Spektrum enhances both compatibility and torque transmission, making the S6400 a reliable choice for demanding applications.
What makes the aluminum case essential for thermal and structural performance?
The HV-compatible surface servo with 6.0–7.4V input, stealth black finish, and heat-dissipating top case is housed in a stylish black and silver anodized aluminum shell that serves dual functions. First, the aluminum top case acts as a heat sink, regulating internal temperatures during extended operation. This is especially important in high-speed or high-torque scenarios where motor heat can degrade performance. Second, the rigid structure of the case protects internal components from impact and vibration, ensuring long-term reliability. The stealth finish adds a professional aesthetic while reinforcing the servo’s rugged build quality.
How do dual output shaft bearings enhance performance?
The Spektrum digital waterproof servo with dual bearings, 266 oz-in torque, and 0.06 sec transit speed incorporates dual main bearings on the output shaft to support smooth rotation and reduce friction. This design minimizes lateral play and maintains gear alignment under load, resulting in more consistent torque delivery and precise movement. Dual bearings also extend the lifespan of the servo by distributing mechanical stress more evenly across the shaft. For racers and crawlers who rely on split-second steering corrections, this feature ensures that the servo responds predictably and efficiently.
Why is the gear train critical to durability and control fidelity?
The Spektrum P-SPMSS6400 brushed HV surface servo with aluminum case and dual output shaft bearings features a gear train constructed from 7075 hard anodized aluminum and steel. The 7075 aluminum output shaft and main gear are precision-machined for tight mesh, reducing backlash and improving torque transfer. Steel internal gears add strength and wear resistance, allowing the servo to maintain performance over time even under aggressive use. This combination of materials ensures that the S6400 delivers reliable control in both competitive and recreational environments, from high-speed buggies to trail-ready crawlers.
How does the removable wire harness simplify installation?
The Spektrum P-SPMSS6400 with removable wire harness, 7075 anodized gear train, and 2-inch extension lead includes a detachable wiring system that allows users to select lead lengths based on their chassis layout. The included 2-inch extension supports compact installations, while alternative lengths can be used for custom builds. This modular approach simplifies routing and maintenance, enabling clean setups and quick swaps during upgrades or repairs. The removable harness also reduces clutter and improves airflow within the chassis, contributing to overall system efficiency.
What role do aluminum mounting tabs play in securing the servo?
The High-speed waterproof servo for 1/10 vehicles with steel internal gears and aluminum mounting tabs is equipped with robust mounting tabs that anchor the servo securely to the chassis. These tabs are machined from aluminum to resist flexing and deformation, even under high-impact conditions. By maintaining a stable mounting position, the tabs prevent vibration-induced misalignment and ensure that torque is transmitted accurately to the steering or throttle system. This is especially valuable in off-road builds where terrain variability can introduce significant mechanical stress.
Is the Spektrum P-SPMSS6400 optimized for high-voltage performance?
Yes. The Spektrum P-SPMSS6400 S6400 HV servo with 266 oz-in torque, 0.06 sec speed, and 25T output spline is fully compatible with high-voltage systems operating between 6.0 and 7.4 volts. At 7.4V, the servo achieves its peak torque of 266 oz-in and a transit speed of 0.06 seconds, making it ideal for competitive applications that demand rapid response and strong mechanical output. The brushed motor is tuned for surface use, delivering consistent performance across a wide range of driving styles and terrain types. Whether you're upgrading an RTR vehicle or building a custom rig, the S6400 adapts seamlessly to your power configuration.
Buy Spektrum P-SPMSS6400 S6400 HV servo for 1/10 scale RC buggies, crawlers, and competitive off-road builds.
Brand, Model and Product Type
- Brand: Spektrum
- Model: P-SPMSS6400
- Product Type: Spektrum P-SPMSS6400 S6400 HV servo with 266 oz-in torque, 0.06 sec speed, and 25T output spline, Spektrum P-SPMSS6400 low-profile digital servo for 1/10 scale buggies, trucks, crawlers, and RTR upgrades, Spektrum P-SPMSS6400 brushed HV surface servo with aluminum case and dual output shaft bearings, Spektrum P-SPMSS6400 with removable wire harness, 7075 anodized gear train, and 2-inch extension lead, High-speed waterproof servo for 1/10 vehicles with steel internal gears and aluminum mounting tabs
Dimensions
- Product Length: 4.1 cm – compact footprint for low-profile surface installations
- Product Height: 3.0 cm – optimized for tight chassis layouts
- Product Width: 2.1 cm – fits standard servo mounting configurations
- Product Weight: 62 g – lightweight design minimizes impact on vehicle balance
Motor and Gear System
- Motor Type: Brushed – tuned for high-speed surface response
- Gear Type: Metal – includes steel internal gears for enhanced durability
- Output Shaft: 7075 hard anodized aluminum – precision-machined for strength and wear resistance
- Spline Count: 25 teeth – compatible with standard servo arms
Performance and Speed
- Maximum Torque: 206 oz-in @6.0V; 266 oz-in @7.4V – delivers high torque for demanding terrain and steering loads
- Transit Speed: 0.08 sec @6.0V; 0.06 sec @7.4V – rapid response for competitive maneuvering
Voltage and Compatibility
- Operating Voltage: 6.0–7.4V HV – supports high-voltage systems for maximum performance
- HV Compatibility: Yes – optimized for 2S LiPo setups and high-performance ESCs
Protection and Reliability
- Waterproof: Yes – sealed aluminum case protects internal components from moisture and debris
- Case Material: Stealth black and silver anodized aluminum – provides heat dissipation and rugged durability
- Bearings: Dual output shaft bearings – ensures smooth rotation and long-term reliability
- Mounting Tabs: Aluminum – robust design for secure installation in high-impact environments
Connectivity and Wiring
- Connector Type: Universal – compatible with standard receiver ports
- Wire Harness: Removable – includes 2-inch extension lead with optional lengths available
Application
- Primary Use: Surface – optimized for 1/10 scale buggies, trucks, crawlers, and RTR upgrades
- Servo Size Category: Standard – designed for low-profile, high-speed surface applications
What’s in the Box
- 1 × S6400 1/10 High Speed/Torque Servo 25T (Model No: P-SPMSS6400)
What You Require / What You Will Need
- Compatible receiver and HV-capable power system – required for full performance operation
We want to make sure your delivery goes smoothly, so here are some important details about our service:
- For orders above £120, we offer delivery to most mainland UK addresses. For orders under £120, we can still deliver to Northern Ireland and the outlying isles, as long as the item can be sent by Royal Mail, weighs less than 30kg, and fits within 61cm × 46cm × 46cm. Some highland and remote areas may carry an extra delivery charge as couriers often apply surcharges in these locations. If you live in one of these areas, feel free to contact us before ordering so we can confirm the delivery options and costs for you.
- Most of our products include delivery in the price. If your order is under £90, a small delivery fee will apply but do not worry this will always be clearly shown at checkout before you complete your purchase.
- Depending on what you choose at checkout, your order will usually be delivered either the next working day or within 2 working days. For next day delivery please place your order before 2:00pm. Orders are dispatched Monday to Friday only. Some items may take a little longer and if that is the case we will always show the expected delivery time on the product page.
- If your order includes items with different dispatch times we will normally wait and send everything together once all items are in stock. If one of the items is going to take a while we will give you the choice either wait for everything to arrive or let us send the available items now and deliver the rest later. It is up to you.
- We use trusted delivery partners to make sure your order gets to you safely and on time. We use DPD for next working day deliveries and Royal Mail for the 2 day option.
- As soon as your order is on its way we will send you a tracking number by email. If you provide your mobile number at checkout we will also send delivery updates straight to your phone so you can keep an eye on progress.
- If a product is marked as "Dispatched within 3 working days" delivery usually takes around 3 to 5 working days from when your order is placed.
- For customers in Inverness and other parts of the Scottish Highlands deliveries can take up to 2 working days even if you select next day delivery as couriers do not currently offer a guaranteed next day service to those areas.
