SAV-SH0255MG+

Overview

The Savox SH0255MG+ Micro Size Digital Servo is a premium choice for RC enthusiasts looking to upgrade their helicopter and park fly aircraft setups. This compact yet powerful servo delivers exceptional performance that rivals much larger standard-size servos, making it the ideal solution for tight spaces where weight matters and precision control is essential. Whether you're flying a 450-size helicopter using CCPM (cyclic pitch control mixing) or setting up a park fly aeroplane, this micro digital servo brings professional-grade reliability and refined engineering to your RC experience in the UK market.

Designed with an over-spec refined approach that overturns the output limitations of ordinary micro-size servos, the SH0255MG+ features Savox's commitment to quality and durability. The servo combines cutting-edge digital technology with durable metal gears and a premium aluminium case, creating a servo that performs like a heavyweight whilst maintaining a featherlight profile. UK RC fliers and hobbyists trust Savox servos for their versatility and dependable performance across a wide range of demanding applications.

This servo represents the pinnacle of micro servo engineering, with production and quality control standards that match those of branded digital cameras. Every component, from the professional gears to the exquisite design, has been meticulously crafted to eliminate common issues like crumbled gears and ensure your RC model operates smoothly from the moment you install it until long after your flying sessions end.

Key Features

• Metal Gear Train — The servo uses a robust metal gear system that ensures exceptional durability and longevity, protecting your investment and eliminating the crumbled gear problems that plague budget micro servos. Metal gears can withstand the stress and vibration of helicopter CCPM operation far better than plastic alternatives, making this a critical feature for serious pilots.
• Aluminium Middle Case — The aluminium construction provides superior heat dissipation, allowing the servo to maintain cooler operating temperatures during extended flight sessions. This thermal management is particularly important in micro servos where heat buildup can degrade performance and reduce servo lifespan, especially in intensive park fly applications.
• Digital Control Circuitry — Modern digital servo technology provides enhanced precision, faster response times, and better signal processing compared to analogue servos, giving your RC helicopter or aircraft superior control authority and responsiveness during flight manoeuvres.
• Soft Start Mode — The new Plus ('+') models include Soft Start Mode technology that gently eases the servo into operation, reducing mechanical shock and extending component lifespan whilst providing smoother control characteristics ideal for delicate flying tasks.
• Sanwa SSR Compatibility — Full compatibility with Sanwa SSR radio systems ensures seamless integration into your existing RC setup without compatibility issues or adapter requirements, making this servo a versatile choice for various radio system configurations.
• Compact Micro Size — At just 22.8 x 12.0 x 29.4mm and weighing only 15.8g (excluding wires and horns), this servo fits into tight fuselage spaces where standard-size servos simply won't fit, making it essential for small RC aircraft and 450-size helicopter builds.
• Professional Gear Design — Professional-grade gear design and precision manufacturing create a solid framework that forms the backbone of reliable servo operation, ensuring consistent performance across thousands of flight hours.
• 21-Tooth Output Spline — The standard 21-tooth spline output ensures compatibility with a wide range of servo horns available in the RC hobby market, giving you flexibility in mounting configurations and control linkage options.

Technical Performance

The Savox SH0255MG+ delivers impressive technical performance that makes it stand out in the competitive micro servo market. Operating at 6V, this servo generates 3.9kg of torque (54.2oz-in), providing ample control force for cyclic pitch mixing on 450-size helicopters and responsive control authority for park fly aeroplanes. The servo achieves extremely fast response times at 0.13 seconds per 60-degree rotation when powered by a 6V battery pack, enabling quick reaction to your radio inputs and smooth, precise flight control. The brushed motor design is proven, reliable technology that delivers consistent performance across varying load conditions. The servo features 1 ball bearing in its design to ensure smooth shaft rotation and reduced friction, whilst the metal gear train and aluminium case work together to create a durable, thermally efficient package. Operating temperatures range from -10°C to 50°C, covering typical outdoor flying conditions in the UK. The servo draws minimal idle current at just 5mA, allowing your battery to maintain charge longer between flying sessions. Under heavy load conditions at locked position, the servo draws approximately 1400mA at 6V, demonstrating strong mechanical power reserves. The pulse width range of 750 to 2250 microseconds with a 1500 microsecond neutral position provides maximum travel flexibility, whilst the 240Hz refresh rate ensures smooth, responsive control feel. The operating travel of 90 degrees (1000-2000 microseconds) covers typical control requirements, with maximum travel extending to approximately 145 degrees when using the full pulse width range. Every aspect of this servo's engineering reflects professional servo design standards, making it suitable for both competitive fliers and dedicated hobbyists.

What's in the Box

• Savox SH0255MG+ Micro Digital Servo
• Standard servo connecting lead (250mm ± 5mm length)

What You Need to Complete

• Servo horns (21-tooth spline compatible)
• Battery pack (4.8V or 6V LiPo, LiFe, or NiMH recommended)
• Radio receiver compatible with standard servo signals
• Servo mounting brackets appropriate to your application
• Mechanical linkages for control rod connection

Frequently Asked Questions

• Is this servo suitable for 450-size helicopter CCPM control? — Yes, the Savox SH0255MG+ is specifically designed and recommended for CCPM (cyclic pitch control mixing) on 450-size helicopters. The 3.9kg torque at 6V provides sufficient control authority for swashplate mixing, whilst the 0.13-second response time enables precise cyclic control during aggressive flight manoeuvres. This servo is engineered to handle the demands of helicopter flight control.
• What voltage should I run this servo at, and what battery do I need? — The servo operates at both 4.8V and 6V. At 6V you get maximum performance with 3.9kg torque and 0.13-second speed. Most RC pilots use standard 2S LiPo battery packs (7.4V nominal, regulated to 6V through a BEC regulator), 2S LiFe packs, or 5-cell NiMH packs (6V nominal) for helicopter operation. The servo draws approximately 240mA at idle when powered by 6V, so a 1000-1500mAh battery provides several flight batteries worth of capacity.
• How does the metal gear design improve durability compared to plastic gear servos? — Metal gears resist the mechanical stress and vibration inherent in helicopter CCPM operation far better than plastic alternatives. Plastic gears can strip or break under continuous cyclic loading, particularly when controlling the swashplate movements required for 3D helicopter flying. The metal gear train in the SH0255MG+ eliminates this weakness, ensuring long service life even with demanding flying styles. Savox's design specifically aims to make 'crumbled gear' history, addressing a common failure mode in budget micro servos.
• What is the difference between the SH0255MG+ and the standard SH0255MG? — The SH0255MG+ models include Soft Start Mode and Sanwa SSR radio system compatibility as new features. The standard SH0255MG lacks these refinements. The Plus model represents an evolutionary upgrade that provides smoother servo operation characteristics and enhanced radio system compatibility, making it the recommended choice for modern RC setups.
• What is the purpose of the Soft Start Mode mentioned for Plus models? — Soft Start Mode gently eases the servo into operation rather than snapping to commanded position instantly. This reduces mechanical shock to gears, bearings, and control linkages, extending component lifespan and providing more refined, less jerky control feel—particularly noticeable during precise park fly manoeuvres or delicate helicopter hovering.
• How much current does this servo draw, and will my battery power supply handle it? — At idle with no load, the servo draws just 5mA at 6V, essentially negligible. During normal operation with moderate control inputs, current draw depends on load. At maximum stall current (locked position), the servo draws approximately 1400mA at 6V. Most RC helicopter battery systems easily handle this. Running current under typical load is much lower, approximately 180-240mA depending on voltage and load conditions.
• Is this servo waterproof for outdoor park fly flying in wet conditions? — The manufacturer specifications do not list an official waterproof rating for this servo. Standard micro servos are not fully sealed against water ingress. For wet weather park fly flying, consider covering servo openings with protective tape or housing the servo in a waterproof compartment within your aircraft fuselage. For helicopter operation indoors, waterproofing is not typically necessary.
• Can I use this servo as a tail rotor servo on my 450 helicopter? — Yes, this servo is suitable for tail rotor control on 450-size helicopters. The 3.9kg torque at 6V provides ample authority for tail rotor pitch mixing, and the 0.13-second response time ensures fast yaw control response. Many helicopter pilots successfully use multiple SH0255MG+ servos in different positions on their 450-size aircraft.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the SAVOX MICRO SIZE DIGITAL SERVO 3.9KG@6V (HELI & PARKFLY) SAV-SH0255MG+ today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.