How to Pick Micro Servos and Soldering Tools for RC
Pick micro servos by torque and weight, then match soldering tools to the joints you make. An SG92R gives 2.5 kg/cm at 4.8V for small planes, while a 60W iron solders motor wires fast. A heat gun shrinks tubing clean. The Plusivo 60W digital soldering iron kit costs $38.99 and adjusts from 200 to 500C.
Quick facts
| Fact | Value |
|---|---|
| SG92R torque | 2.5 kg/cm at 4.8V, $8.00 |
| MG996R torque | 9.4 kg/cm at 4.8V, $15.99 |
| Plusivo Digital iron kit | $38.99, adjusts 200 to 500C |
| Plusivo Wired iron kit | $13.99, adjusts 200 to 450C |
| Soldering starter kit | $14.99, mat, hands, and tape |
| Soldering mat | $8.37, rated to 932F |
Which micro servo fits a small RC build?
Match the servo to the load, not to the size of the model. The SG92R gives 2.5 kg/cm at 4.8V for small planes and cars.
The MG90D adds metal gears and digital control in a 13g case. It costs $14.00 and suits larger park flyers.
The DSM-44 moves in 0.07 sec per 60 degrees for fast control. Pick it when the servo must answer quick stick moves.
When does a standard servo beat a micro servo?
A standard servo wins when the load passes micro servo torque. The MG996R gives 9.4 kg/cm at 4.8V and 11 kg/cm at 6V.
It weighs 55g and measures 40.7 by 19.7 by 42.9 mm. Check the bay size before you swap a micro servo for a standard one.
It draws 1400mA at stall, per its TowerPro datasheet. Size the BEC for stall current, not for idle current.
What wattage soldering iron suits RC work?
A 60W iron suits motor wires, ESC leads, and battery plugs. The $38.99 digital kit adjusts from 200 to 500C with an LED display.
A wired 60W kit suits fine board work and heavy joints alike. The $13.99 kit adjusts from 200 to 450C with a temperature knob.
Set the iron to 350C for most RC solder joints. A cold iron makes dull joints, and a hot iron lifts pads.
Which bench tools speed up RC soldering?
Helping hands hold wires still while you solder. The magnetic set costs $3.99, and the station with a magnifier costs $31.99.
A PCB holder with a suction base holds boards steady. It resists heat to 260C and measures 50 by 70mm.
A silicone mat guards the bench from heat and solder drops. The $8.37 mat resists heat to 932F and wipes clean.
How do you solder servo leads without damage?
Tin each wire end before you join it to the next wire. Tinned wires join fast and need less heat on the joint.
Slide heat shrink over the wire before you solder. A heat gun at $20.99 shrinks the tubing tight without scorching it.
Keep the iron on the joint for 2 to 3 sec only. Longer heat melts the servo wire insulation and the connector housing.
How the options compare
| Part | Use | Key spec | Price |
|---|---|---|---|
| SG92R servo | Micro servo | 2.5 kg/cm at 4.8V | $8.00 |
| MG90D servo | Micro servo | 13g, metal gears, digital | $14.00 |
| MG996R servo | Standard servo | 9.4 kg/cm at 4.8V | $15.99 |
| Plusivo Digital iron kit | Soldering | 60W, 200 to 500C, LED display | $38.99 |
| Soldering starter kit | Bench setup | Mat, hands, and tape | $14.99 |
| Mini heat gun | Heat shrink | Compact bench gun | $20.99 |
| Plusivo Wired iron kit | Soldering | 60W, 200 to 450C | $13.99 |
How do you solder a servo lead?
- Strip 5mm of insulation from each wire end.
- Slide a piece of heat shrink over one wire.
- Tin both wire ends with a small amount of solder.
- Join the wires and heat the joint for 2 to 3 sec.
- Slide the heat shrink over the joint and shrink it with the heat gun.
- Tug the joint gently to check it holds.
Parts that fit this guide
In-stock parts ship from the New York, USA warehouse in 1-2 business days. Prices below are the live store prices we verified on November 10, 2026.
SG92R Analog Plastic Composite Gear Micro Servo ($8.00)
Micro servo at $8.00. It gives 2.5 kg/cm of torque at 4.8V with plastic composite gears.
MG90D Digital Metal Gear Micro Servo ($14.00)
Digital metal gear micro servo at $14.00. It weighs 13g and suits larger park flyers.
MG996R Metal Gear Servo ($15.99)
Standard servo at $15.99. It gives 9.4 kg/cm of torque at 4.8V with metal gears.
Micro Servo SG90 / SG92R / MG90S ($13.99)
Micro servo set at $13.99. Pick the SG90, SG92R, or MG90S model at checkout.
Plusivo 60W Digital Soldering Iron Kit, 21-in-1, 120V US Plug, LED Display, 200-500C ($38.99)
Digital soldering iron kit at $38.99. It gives 60W with an LED display and adjusts from 200 to 500C.
Soldering Starter Kit ($14.99)
Soldering starter kit at $14.99. It holds a silicone mat, magnetic helping hands, and Kapton tape.
Mini Heat Gun for Heat Shrink ($20.99)
Mini heat gun at $20.99. It shrinks heat shrink tubing for wire work and RC bench jobs.
Heat Resistant Magnetic Silicone Soldering Mat ($8.37)
Soldering mat at $8.37. It resists heat to 932F and guards the bench from solder drops.
Plusivo 60W Soldering Iron Kit, 120V US Plug, Adjustable 200-450C ($13.99)
Soldering iron kit at $13.99. It gives 60W with an adjustable temperature knob from 200 to 450C.
Magnetic Soldering Helping Hands, 10 Arms ($3.99)
Magnetic soldering helping hands at $3.99 with 10 arms. They hold wire and small parts steady while you solder.
Adjustable PCB Holder with Suction Base ($4.37)
Adjustable PCB holder at $4.37 with a suction base and clamp. It holds boards steady while you solder and resists heat to 260C.
Shop the full range: Tools and Soldering at Quality RC Parts. See also: Related guide.
Frequently asked questions
What temperature should I solder RC wires at?
About 350C for most RC joints. The digital kit adjusts from 200 to 500C for other jobs.
Can a micro servo steer a 1/10 RC car?
No, not well. A 1/10 car needs a standard servo such as the MG996R with 9.4 kg/cm at 4.8V.
Do I need a soldering station or just an iron?
A Plusivo digital iron kit at $38.99 covers most RC work. The wired kit at $13.99 suits fine board work too.
How do I keep solder off my bench?
Use a silicone mat rated to 932F. The mat in this guide costs $8.37 and wipes clean.
Sources
Last updated: November 10, 2026.
